Registration of Seed Sterile, Perennial Sorghum spp. [Sorghum bicolor (L.) Moench x S. halepense (L.) Pers.] Hybrid 'PSH09TX15'
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Crop Science Society of America. All rights reserved. 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.
