Registration of Seed Sterile, Perennial Sorghum spp. [Sorghum bicolor (L.) Moench x S. halepense (L.) Pers.] Hybrid 'PSH09TX15'

摘要

A novel, perennial Sorghum spp. hybrid (PSH) [Sorghum bicolor (L.) Moench x S. halepense (L.) Pers.], 'PSH09TX15' (Reg. No. GS-785, PI 680638) was identified that possesses complete seed sterility, only rare occurrences ( 0.1%) of flowering, and significantly greater mean leaf number per tiller than S. halepense. Initial collection of the hybrid was made in 2009, and subsequent evaluations were made in a collaborative effort between Texas A&M University, Texas A&M AgriLife Research, and the USDA-ARS. Winter survival of PSH09TX15 exceeded 98% at three locations in plant hardiness zones 9a, 8b, and 8a between 2012 and 2015 with no significant differences across locations. PSH09TX15 developed significantly greater leaf numbers per tiller (>= 11) and shorter rhizome derived shoot (RDS) distances (-50%) than naturalized populations of S. halepense. PSH09TX15 produced annual biomass yields not significantly different than Dekalb Sudax ('SX-17') forage sorghum across three seasons (2012-2014) at three locations (College Station, Beeville, Commerce) in Texas. Effective eradication protocols were identified for PSH09TX15 to enable crop rotations. As a high biomass genotype, PSH09TX15 provides a perennial sorghum germplasm source suitable for utilization as a hay, forage, and biofuel feedstock with risk of neither seed weed invasiveness nor hybridization with cultivated S. bicolor.