Breeding and genetics

Warm-Season (C4) Grasses

Volumn , Issue , 2016, Pages 51-94

  Vogel, Kenneth P ^a   Burson, Byron L ^b  

^a UNIVERSITY OF NEBRASKA LINCOLN   (United States)

^b TEXAS A AND M UNIVERSITY   (United States)

Author keywords

Genetic variation; Germplasm; Grass inflorescence structure; Mass selection; Natural hybridization; Plant breeding; Self incompatibility mechanisms; Sterility mechanisms; Warm season grasses

Indexed keywords

EID: 85101460268     PISSN: None     EISSN: None     Source Type: Book    
DOI: 10.2134/agronmonogr45.c3     Document Type: Chapter

References (166)

1. Aastveit, A.H., and K. Aastveit. 1990. Theory and application of open-pollination and polycross in forage grass breeding. Theor. Appl. Genet. 79: 618-624.
2. Alderson, J., and W.C. Sharp. 1994. Grass varieties in the United States. Agric. Handb. 170. CRC Press-Lewis Publ., Boca Raton, FL.
3. Alexandrova, K.S., P.D. Denchev, and B.V. Conger. 1996a. In vitro development of inflorescences from switchgrass nodal segments. Crop Sci. 36: 175-178.
4. Alexandrova, K.S., P.D. Denchev, and B.V. Conger. 1996b. Micropropagation of switchgrass by node culture. Crop Sci. 36: 1709-1711.
5. Allard, R.W. 1964. Principles of plant breeding. John Wiley & Sons, New York.
6. Asker, S.E., and L. Jerling. 1992. Apomixis in plants. CRC Press, Boca Raton, FL.
7. Baker, R.J. 1986. Selection indices in plant breeding. CRC Press, Boca Raton, FL.
8. Bashaw, E.C. 1962. Apomixis and sexuality in buffelgrass. Crop Sci. 2: 412-415.
9. Bashaw, E.C. 1968. Registration of Higgins buffelgrass. Crop Sci. 8: 397-398.
10. Bashaw, E.C. 1980a. Apomixis and its application in crop improvement, p. 45-63. In W.R. Fehr and H.H. Hadley (ed.). Hybridization of crop plants. ASA, Madison, WI.
11. Bashaw, E.C. 1980b. Registration of Nueces and Llano buffelgrass. Crop Sci. 20: 112.
12. Bashaw, E.C., and CR. Funk. 1987. Apomictic grasses, p. 40-82. In W.R. Fehr (ed.). Principles of cultivar development: Vol. 2, crop species. MacMillian Publ. Co., New York.
13. Bashaw, E.C., and W.W. Hanna. 1990. Apomictic reproduction, p. 100-130. In G.P. Chapman (ed.). Reproduction versatility in the grasses. Cambridge Univ. Press, Cambridge, UK.
14. Bashaw, E.C., and K.W. Hignight. 1990. Gene transfer in apomictic buffelgrass through fertilization of an unreduced egg. Crop Sci. 30: 571-575.
15. Bashaw, E.C., A.W. Hovin, and E.C Holt. 1970. Apomixis, its evolutionary significance and utilization in plant breeding, p. 245-248. In M.J.T. Norman (ed.). Proc. Int. Grassl. Congr., 11th, Surfers Paradice, QLD, Australia. 13-23 Apr. 1970. Univ. of Queensland Press, St. Lucia, QLD, Australia.
16. Bashaw, E.C., M.A. Hussey, and K.W. Hignight. 1992. Hybridization (N + N and 2N + N) of facultative apomictic species in the Pennisetum agamic complex. Int. J. Plant Sci. 3: 466-470.
17. Benedict, H.M. 1941. Effect of day length and temperature on the flowering and growth of four species of grasses. J. Agric. Res. 61: 661-672.
18. Brewbaker, J.L. 1957. Pollen cytology and self-incompatibility systems in plants. J. Hered. 48: 271-277.
19. Brummer, E.C. 1998. Molecular and cellular technologies in forage improvement: An overview, p. 1-10. In Molecular and cellular technologies for forage improvement. In E.C. Brummer et al. (ed) CSSA Spec. Publ. 26. CSSA, Madison, WI.
20. Burson, B.L., and M.A. Hussey. 1996. Breeding apomictic forage grasses, p. 226-230. In M.J. Williams (ed.). Proc. Am. Forage Grassl. Counc, Vol. 5. Vancouver, BC, Canada. 13-15 June 1996. AFGC, Georgetown, TX.
21. Burson, B.L., M.A. Hussey, J.M. Actkinson, and G.S. Shafer. 2002. Effect of pollination time on the frequency of 2n+n fertilization in apomictic buffelgrass. Crop Sci. 42: 1075-1080.
22. Burson, B.L., P.W. Voigt, R.A. Sherman, and C.L. Dewald. 1990. Apomixis and sexuality in eastern gam- agrass. Crop Sci. 30: 86-89.
23. Burson, B.L., and B.A. Young. 2001. Breeding and improvement of tropical grasses, p. 59-79. In A. Sotomayor-Rios and W.D. Pitman (ed.). Tropical forage plants: Development and use. CRC Press, Boca Raton, FL.
24. Burton, G.W 1948. The performance of various mixtures of hybrid and parent inbred millet. J. Am. Soc. Agron. 40: 908-915.
25. Burton, G.W. 1974. Recurrent restricted phenotypic selection increases forage yields of Pensacola bahi- agrass. Crop Sci. 14: 831-835.
26. Burton, G.W 1982. Improved recurrent restricted phenotypic selection improves bahiagrass forage yields. Crop Sci. 22: 1058-1061.
27. Burton, G.W. 1986. Developing better forages for the south. J. Anim. Sci. 63: 63-65.
28. Burton, G.W., 1989a. Progress and benefits to humanity from breeding warm-season forage grasses, p. 21-29. In D.A. Sleper et al. (ed.) Contributions from breeding forage and turf grasses. CSSA Spec. Publ. 15. CSSA, Madison, WI.
29. Burton, G.W. 1989b. Registration of ‘Tifton 9' Pensacola bahiagrass. Crop Sci. 29: 1326.
30. Burton, G.W., and I. Forbes, Jr. 1960. The genetics and manipulation of obligate apomixis in common bahiagrass (Paspalum notatum Flügge), p. 66-71. In C.L. Skidmore (ed.). Proc. Int. Grassl. Congr., 8th, Reading, England. 11-21 July 1960. Alden Press, Oxford, UK.
31. Cäceres, M.E., F. Matzk, A. Busti, F. Pupilli, and S. Arcioni. 2001. Apomixis and sexuality in Paspalum simplex: Characterization of the mode of reproduction in segregating progenies by different methods. Sex Plant Reprod. 14: 201-206.
32. Casler, M.D., D.R. Buxton, and K.P. Vogel. 2002. Genetic modification of lignin concentration affects fitness of perennial herbaceous plants. Theor. Appl. Genet. 104: 127-131.
33. Casler, M.D., and K.P. Vogel. 1999. Accomplishments and impact from breeding for increased forage nutritional value. Crop Sci. 39: 12-20.
34. Chao, C-Y. 1964. Megasporogenesis, megagametogenesis and embryology in Paspalum orbiculare. Acad. Ann. New Asia Coll. 6: 15-25.
35. Chao, C-Y. 1974. Megasporogenesis and megagametogenesis in Paspalum commersonii and P. longi-folium at two ploidy levels. Bot. Notister 127: 267-275.
36. Chao, C-Y. 1980. Autonomous development of embryo in Paspalum conjugatum Berg. Bot. Notister 133: 215-222.
37. Conger, B.V. 1998. Genetic transformation of forage grasses, p. 49-58. In E.C. Brummer et al. (ed.). Molecular and cellular technologies for forage improvement. CSSA Spec. Publ. 26. CSSA, Madison, WI.
38. Cornelius, D.R., and CO. Johnston. 1941. Differences in plant type and reaction to rust among several collections of Panicum virgatum L. J. Am. Soc. Agron. 33: 115-124.
39. Darlington, CD. 1939. The evolution of genetic systems. Cambridge Univ. Press, Cambridge, UK.
40. Denchev, P.D., and B.V. Conger, 1994. Plant regeneration from callus culture of switchgrass. Crop Sci. 34: 1623-1627.
41. de Nettancourt, D. 1977. Incompatibility in angiosperms. Springer-Verlag, New York.
42. Dewald, C.L., PL. Sims, and W.A. Berg. 1995. Registration of ‘WW-B.Dahl’ Old World bluestem. Crop Sci. 35: 937.
43. Dewald, C.L., P.L. Sims, W.A. Berg, and L.M. White. 1988. Registration of ‘WW-Iron Master’ Old World bluestem. Crop Sci. 28: 189-190.
44. Dewald, C.L., P.L. Sims, P.I. Coyne, and W.A. Berg. 1985. Registration of ‘WW-Spar’ bluestem. Crop Sci. 25: 707.
45. de Wet. 1960. Cytogeography of Themeda triandra in South Africa. Phyton 15: 37-42.
46. de Wet, J.M.J. 1979. Origins of polyploids, p. 3-15. In W.H. Lewis (ed.). Polyploidy: Biological relevance. Plenum Press, New York.
47. Dewey, D.R. 1984. The genomic system of classification as a guide to intergeneric hybridization with the perennial Triticeae. p. 209-279. In J.P. Gustafson (ed.) Gene manipulation in plant improvement. 16th Stadler Genetics Symp., Columbia, MO. Plenum Press, New York.
48. Dodds, P.N., A.E. Clark, and E. Nebigin. 1997. Molecules involved in self-incompatibility in flowering plants. Plant Breed. Rev. 15: 19-42.
49. Dutta G.S., and B.V. Conger. 1999. Somatic embryogenesis and plant regeneration from suspension cultures of switchgrass. Crop Sci. 39: 223-227.
50. Duvick, D.N. 1999. How much caution in the fields? Science (Washington, DC) 286: 418-419.
51. Eberhardt, S.A., and L.C. Newell. 1959. Variation in domestic collections of switchgrass, Panicum vir-gatum L. Agron. J. 51: 613-616.
52. Espinoza, F., and C.L. Quarin. 2000. 2n+n hybridization of apomictic Paspalum dilatatum with diploid Paspalum species. Int. J. Plant Sci. 161: 221-225.
53. 4) grasses. Agron. Monogr. 45. ASA, CSSA, and SSSA, Madison, WI.
54. Falconer, D.S. 1981. Introduction to quantitative genetics. 2nd ed. Longman, New York.
55. Fasoulas, A.C., and V.A. Fasoulas. 1995. Honeycomb selection designs. Plant Breed. Rev. 13: 87-139.
56. Fehr, W.R. (ed.) 1987. Principles of cultivar development. Vol. 1. MacMillian Publ. Co., New York.
57. Fehr, W.R., and H.H. Hadley (ed.) 1980. Hybridization of crop plants. ASA and CSSA, Madison, WI.
58. Fisher, W.D., E.C. Bashaw, and E.C. Holt. 1954. Evidence for apomixis in Pennisetum ciliare and Cenchrus setigerus. Agron. J. 46: 401-404.
59. Frye, C.T. 2000. Non-native genotypes and outbreeding depresssion in plants: Theoretical and impiri-cal issues, p. 26-38. In J.C Ritchie et al. (ed.). Proc. of the Second Eastern Native Grass Symp., Baltimore, MD. 17-19 Nov. 1999. Agric. Res. Serv. And Natural Resources Conserv. Serv., USDA, Beltsville, MD. Available at http://purl.access.gpo.gov/GPO/LPS12575 (verified 12 Feb. 2004).
60. Gardner, C.O. 1961. An evaluation of effects of mass selection and seed irradiation with thermal neutrons on yields of corn. Crop Sci. 1: 241-245.
61. Gould, F.W. 1975. The grasses of Texas. Texas A&M Univ. Press, College Station.
62. Greenham, J., and G.P. Chapmen. 1990. Ovule structure and diversity, p. 52-75. In G.P. Chapman (ed.). Reproduction versatility in the grasses. Cambridge Univ. Press, Cambridge, UK.
63. Grimanelli, D., O. Leblanc, E. Espinosa, E. Perotti, D. Gonzalez de Leon, and Y. Savidan. 1998a. Non-Mendelian transmission of apomixis in maize-Tripsacum hybrids caused by a transmission ratio distortion. Heredity 80: 40-47.
64. Grimanelli, D., O. Leblanc, E. Espinosa, E. Perotti, D. Gonzalez de Leon, and Y. Savidan. 1998b. Mapping diplosporous apomixis in tetraploid Tripsacum: One gene or several genes? Heredity 80: 33-39.
65. Griffiths, D.J., R.A.D. Pegler, and T. Tonguthaisri. 1971. Cross compatibility between diploid and tetraploid perennial ryegrass (Lolium perenne L.). Euphytica 20: 102-112.
66. Gunter, L.E., G.A. Tuskan, and S.D. Wullschleger. 1996. Diversity among populations of switchgrass based on RAPD markers. Crop Sci. 36: 1017-1022.
67. Gustine, D.L., R.T. Sherwood, and D.R. Huff. 1997. Apospory-linked molecular markers in buffelgrass. Crop Sci. 37: 947-951.
68. Hallauer, A.R., and J.B. Miranda. 1981. Quantitative genetics in maize breeding. Iowa State Univ. Press, Ames.
69. Hanna, W.W. 1995. Use of apomixis in cultivar development, p. 333-350. In D.L. Sparks (ed.). Advances in Agronomy. Academic Press, New York.
70. Hanna, W.W., and E.C. Bashaw. 1987. Apomixis: Its identification and use in plant breeding. Crop Sci. 27: 1136-1139.
71. Hanna, W.W., J.B. Powell, J.C. Millot, and G.W. Burton. 1973. Cytology of obligate sexual plants in Panicum maximum Jacq. and their use in controlled hybrids. Crop Sci. 13: 693-697.
72. Hanson, A.A., and H.L. Carnahan. 1956. Breeding perennial forage grasses. USDA-ARS Tech. Bull. 1145. U.S. Gov. Print. Office, Washington, DC.
73. Harlan, J.R., M.R. Brookes, D.S. Borgaonkar, and J.M.J., de Wet. 1964. The nature and inheritance of apomixis in Bothriochloa and Dichanthium. Bot. Gaz. (Chicago) 125: 41-46.
74. Harlan, J.R., and J.M.J., de Wet. 1975. On ö wing and a prayer: The origins of polyploidy. Bot. Rev. 41: 361-391.
75. Hayman, D.L. 1992. The S-Z incompatibility system, p. 117-137. In G.P. Chapman (ed.). Grass evolution and domestication. Cambridge Univ. Press, Cambridge, UK.
76. Heslop-Harrison, J. 1982. Pollen-stigma interaction and cross-incompatibility in the grasses. Science (Washington, DC) 210: 1358-1364.
77. Hopkins, A.A., C.M. Taliaferro, C.D. Murphy, and D. Christian. 1996. Chromosome number and nuclear DNA content of several switchgrass populations. Crop Sci. 36: 1049-1052.
78. Hopkins, A.A., K.P. Vogel, and K.J. Moore. 1993. Predicted and realized gains from selection for in vitro dry matter digestibility and forage yield in switchgrass. Crop Sci. 33: 253-258.
79. Hopkins, A.A., K.P. Vogel, K.J. Moore, K.D. Johnson, and LT. Carlson. 1995. Genetic variability and genotype x environment interactions among switchgrass accessions from the Midwestern USA. Crop Sci. 35: 565-571.
80. Hultquist, S.J., K.P. Vogel, D.J. Lee, K. Arumuganathan, and S. Kaeppler. 1996. Chloroplast DNA and nuclear DNA content variations among cultivars of switchgrass, Panicum virgatum L. Crop Sci. 36: 1049-1052.
81. Hultquist, S.J., K.P. Vogel, D.E. Lee, K. Arumuganathan, and S. Kaeppler. 1997. DNA content and chloroplast DNA polymorphisms among accessions of switchgrass from remnant Midwestern prairies. Crop Sci. 37: 595-598.
82. Hussey, M.A., E.C. Bashaw, K.W. Hignight, and M.L. Dalmer. 1991. Influence of photoperiod on the frequency of sexual embryo sacs in facultative apomictic buffelgrass. Euphytica 54: 141-145.
83. Jessup, R.W., B.L. Burson, G.B. Burrow, Y.-W. Wang, C. Chang., Z. Li, A.H. Paterson, and M.A. Hussey. 2002. Disomic inheritance, suppressed recombination, and allelic interactions govern apospory in buffelgrass as revealed by genome mapping. Crop Sci. 42: 1688-1694.
84. Jessup, R.W., B.L. Burson, G.B. Burrow, Y.-W. Wang, C. Chang., Z. Li, A.H. Paterson, and M.A. Hussey. 2003. Segmental allotetraploidy and allelic interactions in buffelgrass [Pennisetum ciliare (L.) Link syn. Cenchrus ciliaris L.] as revealed by genome mapping. Genome 46: 304-313.
85. Johnston, S.A., T.P.N., de Nijs, S.J. Peloquin, and R.E. Hanneman, Jr. 1980. The significance of genie balance to endosperm development in interspecific crosses. Theor. Appl. Genet. 57: 5-6.
86. Kindiger, B., and C.L. Dewald. 1994. Genome accumulation in eastern gamagrass, Tripsacum dactx- loides (L.) L. Genetica 92: 197-201.
87. Knapp, S.J. 1998. Marker-assisted selection as a strategy for increasing the probability of selection using superior genotypes. Crop Sci. 38: 1164-1174.
88. Knox, R.B., and J. Heslop-Harrison. 1963. Experimental control of aposporous apomixis in a grass of the Andropogoneae. Bot. Notiser 116: 127-141.
89. Koltunow, A.M., and U. Grossniklaus. 2003. Apomixis: A developmental perspective. Annu. Rev. Plant Biol. 54: 547-574.
90. Leblanc, O., D. Grimanelli, D. Gonzalez-de-Leon, and Y. Savidn. 1995a. Detection of the mode of reproduction in maize-Tripsacum hybrids using maize RFLP markers. Theor. Appl. Genet. 90: 1198-1203.
91. Leblanc, O., M.D. Peel, J.G. Carman, and Y. Savidan. 1995b. Megasporogenesis and megagametogenesis in several Tripsacum species (Poaceae). Am. J. Bot. 82: 57-63.
92. Liu, B.H. 1998. Statistical genomics: Linkage, mapping, and QTL analysis. CRC Press. Boca Raton, FL.
93. Lu, K., S.M. Kaeppler, K.P. Vogel, K. Arumuganathan, and D.J. Lee. 1998. Nuclear DNA content and chromosome numbers in switchgrass. Great Plains Res. 8: 269-280.
94. Lundqvist, A. 1956. Self-incompatibility in rye. I. Genetic control in the diploid. Hereditas 42: 293-348.
95. Lundqvist, A. 1957. Self-incompatibility in rye. II. Genetic control in the tetraploid. Heredität 43: 467-511.
96. Martinez, E.J., F. Espinoza, and C.L. Quarin. 1994. Bm Progeny (2n+n) from Paspalum notatum obtained through early pollination. J. Hered. 85: 295-297.
97. Martinez-Reyna, J.M., and K.P. Vogel. 1998. Controlled hybridization technique for switchgrass. Crop Sci. 38: 876-878.
98. Martinez-Reyna, J.M., and K.P. Vogel. 2002. Incompatiblity systems in switchgrass. Crop Sci. 42: 1800-1805.
99. McMillian, C. 1959. The role of ecotypic variation in the distribution of the central grassland of North America. Ecol. Mono. 29: 285-308.
100. Meyer, W.A., and C.R. Funk. 1989. Progress and benefits to humanity from breeding cool-season grasses for turf, p. 31-48. In D.A. Sleper et al. (ed.). Contributions from breeding forage and turf grasses. CSSA Spec. Publ. 15. CSSA, Madison, WI.
101. Miles, J.W., and C.B. do Valle. 1996. Manipulation of apomixis in Brachiaria breeding, p. 164-177. In J.W Miles et al. (ed.). Brachiaria: Biology, agronomy, and improvement. CIAT-EMBRAPA, Cali, Colombia.
102. 4) grasses. Agron. Monogr. 45. ASA, CSSA, and SSSA, Madison, WI.
103. 4) grasses. Agron. Monogr. 45. ASA, CSSA, and SSSA, Madison, WI.
104. Moser, L.E., and K.P. Vogel. 1995. Switchgrass, big bluestem, and indiangrass. p. 409-420. In R.F Barnes et al. (ed.) Forages, 5th ed. Vol. I: An introduction to grassland agriculture. Iowa State Univ. Press, Ames.
105. 4) grasses. Agron. Monogr. 45. ASA, CSSA, and SSSA, Madison, WI.
106. Nakagawa, H. 1990. Embryo sac analysis and crossing procedure for breeding apomictic guineagrass (Panicum maximum Jacq.). JARQ 24: 163-168.
107. Nakagawa, H., N. Shimizu, and W.W. Hanna. 1993. Cytology of ‘Natsukaze’ guineagrass (Panicum maximum), a natural apomictic hybrid between a sexual and an apomictic plant. J. Jpn. Soc. Grassl. Sci. 39: 374-380.
108. Newell, L.C. 1968. Effects of strain source and management practice on forage yields of two warm-season prairie grasses. Crop Sci. 8: 205-210.
109. Nielsen, E.L. 1944. Analysis of variation in Panicum virgatum. J. Agric. Res. 69: 327-353.
110. Nogler, G.A. 1984. Gametophytic apomixis. p. 475-518. In B.M. Joshi (ed.) Embryology of an-giosperms. Springer-Verlag, Berlin.
111. Norrmann, G.A., O.A. Bovo, and C.L. Quarin. 1994. Post-zygotic seed abortion in sexual diploid x apomictic tetraploid intraspecific Paspalum crosses. Aust. J. Bot. 42: 449-456.
112. Oliver, M.J., J.E. Quisenberry, N.L.G. Trolinder, and D.L. Keim. 1999. Control of gene expression. U.S. Patent 5 723 765. Date issued: 3 Mar. 1998.
113. Ozias-Akins, P., E.L. Lubbers, WW. Hanna, and J.W McNay. 1993. Transmission of the apomictic mode of reproduction in Pennisetum: co-inheritance of the trait and molecular markers. Theor. Appl. Genet. 85: 632-638.
114. Ozias-Akins, P., D. Roche, and WW Hanna. 1998. Tight clustering and hemizygosity of apomixis linked molecular markers in Pennisetum squamulatum implies genetic control of apospory by divergent locus that may have no allelic form in sexual genotypes. Proc. Natl. Acad. Sci. (USA) 95: 5127-5132.
115. Pepin, G.W., and CR. Funk. 1971. Intraspecific hybridization as a method of breeding Kentucky blue-grass (Poa pratensis L.) for turf. Crop Sci. 11: 445-448.
116. Pessino, S.C., C. Evans, J.P.A. Ortiz, I. Armstead, CB. do Valle, and M.D. Hayward. 1998. A genetic map of the apospory-region in Brachiaria hybrids: Identification of two markers closely associated with the trait. Hereditas 128: 153-158.
117. Petrov, D.F., E.S. Fokina, and N.I. Belovsova. 1985. Experimental production of apomixis in corn, Dok-lady Akad. Nauk SSSR, 281, 509, (Doklady Bot. Sci., 281, 31).
118. Poehlman, J.M. 1987. Breeding field crops. 3rd ed. AVI Publ. Co., Westport, CT.
119. Pupilli, F., M.E. Cäceres, C.L. Quarin, and S. Arcioni. 1997. Segregation analysis of RFLP markers reveals a tetrasomic inheritance in apomictic Paspalum simplex. Genome 40: 822-828.
120. Pupilli, F., P. Labombarda, M.E. Cäceres, C.L. Quarin, and S. Arcioni. 2001. The chromosome segment related to apomixis in Paspalum simplex is homoeologous to the telomeric region of the long arm of rice chromosome 12. Mol. Breed. 8: 53-61.
121. Quarin, C.L. 1986. Seasonal changes in the incidence of apomixis of diploid, triploid, and tetraploid plants of Paspalum cromyorrhizon. Euphytica 35: 515-522.
122. Quarin, C.L., F. Espinoza, E.J. Martinez, S.C. Pessino, and O.A. Bovo. 2001. A rise of ploidy level induces the expression of apomixis in Paspalum notatum. Sex. Plant Reprod. 13: 243-249.
123. Richards, H.A., V.A.Rudas, H. Sun, J.K. McDaniel, Z. Tomaszewski, and B.V. Conger. 2001. Construction of a GFP-BAR plasmid and its use for switchgrass transformation. Plant Cell Rep. 20: 48-54.
124. Riley, R.D., and K.P. Vogel. 1982. Chromosome numbers of released cultivars of switchgrass, india-grass, big bluestem and sand bluestem. Crop Sci. 22: 1081-1083.
125. Sampson, F., and F. Knopf. 1994. Prairie conservation in North America. Bioscience 44: 418-421.
126. Sato, H., N. Shimizu, H. Nakagawa, and K. Nakajima. 1990. A new registered cultivar “Natsukaze” of guineagrass (Panicum maximum) [Japan]. JARQ 23: 196-201.
127. Savidan, Y.H. 1983. Genetics and utilization of apomixis for the improvement of guineagrass (Panicum maximum Jacq.). p. 182-184. In J.A. Smith and V.W. Hayes (ed.) Proc. Int. Grassl. Congr., 14th, Lexington, KY. 15-24 June 1981. Westview Press, Boulder, CO.
128. Savidan, Y. 2000. Apomixis: Genetics and breeding, p. 13-86. In J. Janick (ed.). Plant breeding reviews. John Wiley & Sons, New York.
129. Savidan, Y. 2001. Transfer of apomixis wide crosses, p. 153-167. In Y. Savidan et al. (ed.). The flowering of apomixis: From mechanisms to genetic engineering. CIMMYT, IRD, European Commission DG VI (FAIR), Mexico, DF.
130. Schutz, W.M., and C.C. Cockerham. 1966. The effect of field blocking on gain from selection. Biometrics 22: 843-846.
131. Service, R.F. 1998. Seed-sterilizing ‘terminator technology’ sows discord. Science (Washington, DC) 282: 850-851.
132. Sherwood, R.T. 2001. Genetic analysis of apomixis. p. 64-82. In Y. Savidan et al. (ed.) The flowering of apomixis: From mechanisms to genetic engineering. CIMMYT, IRD, European Commission DG VI (FAIR), Mexico, DF.
133. Sherwood, R.T., C.C. Berg, and B.A. Young. 1994. Inheritance of apospory in buffelgrass. Crop Sci. 34: 1490-1494.
134. Simpson, C.E., and E.C. Bashaw. 1969. Cytology and reproductive characteristics of Pennisetum se- taceum. Am. J. Bot. 56: 31-36.
135. Sleper, D.A. 1987. Forage grasses, p. 161-208. In W.R. Fehr (ed.). Principles of cultivar improvement. Macmillian Publ. Co., New York.
136. Smith, R.L. 1972. Sexual reproduction in Panicum maximum. Crop Sci. 12: 624-627.
137. Snyder, L.A. 1957. Apomixis in Paspalum secans. Am. J. Bot. 44: 318-327.
138. Snyder, L.A., and J.R. Harlan. 1950. A cytological study of Bouteloua gracilis from western Texas and eastern New Mexico. Am. J. Bot. 40: 702-707.
139. Somleva, M.N., Z. Tomaszewski, and B.V. Conger. 2002. Agrobacterium-mediat&d genetic transformation of switchgrass. Crop Sci. 42: 2080-2087.
140. Steinauer, E.M., and S.L.Collins. 1996. Prairie ecology-The tallgrass prairie, p. 40-52. In F.B. Sampson and F.L. Knoph (ed.). Prairie conservation. Preserving North America’s most endangered ecosystem. Island Press, Washington, DC.
141. Stuber, C.W., M. Polacco, and M.L. Senior. 1999. Synergy of empirical breeding, marker-assisted selection, and genomics to increase crop yield potential. Crop Sci. 39: 1571-1583.
142. Swenne, A., B-P Louant, and M. Dujardin. 1981. Induction par la colchicine de formes autotétraploides chez Brachiaria ruziziensis Germain et Evrard (Graminées). Agron. Trop. 36: 134-141.
143. Taliaferro, C.M., and E.C. Bashaw. 1966. Inheritance and control of obligate apomixis in breeding buffelgrass. Crop Sci. 6: 473-476.
144. Taliaferro, C.M., and J.R. Harlan. 1973. Registration of Plains bluestem. Crop Sci. 13: 580.
145. 4) grasses. Agron. Monogr. 45. ASA, CSSA, and SSSA, Madison, WI.
146. Taliaferro, C.M., K.P. Vogel, J.H. Bouton, S.B. McLaughlin, and G.A. Tuscan. 1999. Reproductive characteristics and breeding improvement potential of switchgrass. p. 147-153. In R.P Overend and E. Chornet (ed.) Biomass-A growth opportunity in green energy and value-added products. Proc. Biomass Conf. of the Americas, 4th, Oakland CA. 29 Aug.-2 Sept. 1999. Elsevier Sci. Ltd, Kidlington, Oxford.
147. Tischler, C.R., and B.L. Burson. 1995. Evaluating different bahiagrass cytotypes for heat tolerance and leaf epicuticular wax content. Euphytica 84: 229-235.
148. 4) grasses. Agron. Monogr. 45. ASA, CSSA, and SSSA, Madison, WI.
149. Valle, C.B. do, and J.W. Miles. 2001. Breeding of apomictic species, p. 137-152. In Y. Savidan et al. (ed.). The flowering of apomixis: From mechanisms to genetic engineering. CIMMYT, IRD, European Commission DG VI (FAIR), Mexico, DF.
150. Valle, C.B. do, and Y.H. Savidan. 1996. Genetics, cytogenetics, and reproductive biology of Brachiaria. p. 147-163. In J.W. Miles et al. (ed.) Brachiaria: Biology, agronomy, and improvement. CIAT-EMBRAPA, Cali, Colombia.
151. Vielle, J.-Ph., B.L. Burson, E.C. Bashaw, and M.A. Hussey. 1995. Early fertilization events in the sexual and aposporous egg apparatus of Pennisetum ciliare (L.) Link. Plant J. 8: 309-316.
152. Visser, N.C., and J.J. Spies. 1998. Uneven segregation of chromosomes: A possible source of aneuploidy in Cenchrus ciliaris (Poaceae: Paniceae). S. Afr. J. Bot. 64: 130-136.
153. Vogel, K.P. 2000. Improving warm-season grasses using selection, breeding, and biotechnology, p. 83-106. In K.J. Moore and B. Anderson (ed.). Native warm-season grasses: Research trends and issues. CSSA Spec. Publ. 30. CSSA and ASA, Madison, WI.
154. 4) grasses. Agron. Monogr. 45. ASA, CSSA, and SSSA, Madison, WI.
155. Vogel, K.P., HJ. Gorz, and FA. Haskins. 1989. Breeding grasses for the future p. 105-122. In D.A. Sleper, K.H. Asay, and J.F. Pedersen (ed.) Contributions from breeding forage and turf grasses. CSSA Spec. Publ. 15. CSSA, Madison, WI.
156. Vogel, K.P., F.A. Haskins, H.J. Gorz, B.A. Anderson, and J.K. Ward. 1991. Registration of Trailblazer’ switchgrass. Crop Sci. 31: 1388.
157. Vogel, K.P., and H.G. Jung. 2001. Genetic modification of herbaceous plants for feed and fuel. Crit. Rev. Plant Sci. 20: 15-49.
158. Vogel, K.P., and J.F. Pedersen. 1993. Breeding systems for cross-pollinated perennial grasses. Plant Breed. Rev. 11: 251-274.
159. Voigt, P.W., and E.C. Bashaw. 1972. Apomixis and sexuality in Eragrostis curvula. Crop Sci. 12: 843-847.
160. Voigt, P.W., and B.L. Burson. 1983. Breeding of apomictic Eragrostis curvula. p. 160-163. In J.A. Smith and V.W. Hayes (ed.) Proc. Int. Grassl. Congr., 14th, Lexington, KY. 15-24 June 1981. West-view Press, Boulder, CO.
161. Voigt, P.W., B.L. Burson, and R.A. Sherman. 1992. Mode of reproduction of lehmann lovegrass. Crop Sci. 32: 118-121.
162. Wang, Z.Y., A. Hopkins, and R. Mian. 2001. Forage and turf grass biotechnology. Crit. Rev. Plant Sci. 20: 573-619.
163. Warmke, H.E. 1954. Apomixis in Panicum maximum Jacq. Am. J. Bot. 41: 5-11.
164. Weimarck, A. 1968. Self-incompatibility in the Gramineae. Hereditas 60: 157-166.
165. Wricke, G., and W.E. Weber. 1986. Quantitative genetics and selection in plant breeding. Walter de Gruyter, Berlin, New York.
166. Young, B.A., R.T. Sherwood, and E.C. Bashaw. 1979. Cleared-pistil and thick-sectioning techniques for detecting aposporous apomixis in grasses. Can. J. Bot. 57: 1668-1672.