320-1 Towards Hybrid Breeding In Switchgrass: Unraveling the Genetics of Self-Incompatibility In Tetraploids.



Wednesday, October 19, 2011
Henry Gonzalez Convention Center, Hall C, Street Level

Andrea Arias-Aguirre1, Ursula K. Frei1 and Thomas Lubberstedt2, (1)Agronomy, Iowa State University, Ames, IA
(2)Iowa State University, Ames, IA
Self-incompatibility (SI) is defined as the inability of fertile hermaphrodite seed plants to produce zygotes after self-pollination. It is a widespread phenomenon  in  Poaceae. SI in several grasses is under gametophytic control of two multiallelic loci, named S and Z, which segregate independently and appear to be conserved across grass species. A third locus restoring self-fertility was reported for Lolium perenne. Switchgrass (Panicum virgatum), is a perennial autopolyploid that shows strong self- incompatibility. Our goal is, to study SI in switchgrass using L. perenne as model species. SI might be an effective hybridization mechanism to produce hybrid seed. Hybrid breeding is a promising option in perennial grasses including switchgrass, which has been proposed as major biomass producing species for biofuel production in the U.S.
See more from this Division: C01 Crop Breeding & Genetics
See more from this Session: Molecular, Statistical and Breeding Tools to Improve Selection Efficiency