Massafaro, Moriah ， Thompson, Addie ， Tuinstra, Mitch ， Dilkes, Brian ， Weil, Clifford F.
2016 CROP SCIENCE 2016 56(卷), 5(期), (2647-2651页)
Sorghum [Sorghum bicolor (L.) Moench] is a dietary staple for >500 million people in over 30 countries of the semiarid tropics. Unlike other major cereals, proteins in sorghum grain become much less digestible after wet cooking. P721Q is a high-lysine sorghum mutant that exhibits a three-to fourfold increase in protein digestibility after cooking as compared with other sorghum cultivars. While its increased lysine content has been traced to decreased levels of a kafirin storage protein, the goal of this study was to identify the genetic determinant of the increased digestibility. Genome sequencing of bulked segregants from a P721Q x BTx623 mapping population revealed the highly digestible protein trait maps to the same cluster of kafirin genes that contain the high-lysine mutation.
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