RRC ID 36134
Author Pourkheirandish M, Hensel G, Kilian B, Senthil N, Chen G, Sameri M, Azhaguvel P, Sakuma S, Dhanagond S, Sharma R, Mascher M, Himmelbach A, Gottwald S, Nair SK, Tagiri A, Yukuhiro F, Nagamura Y, Kanamori H, Matsumoto T, Willcox G, Middleton CP, Wicker T, Walther A, Waugh R, Fincher GB, Stein N, Kumlehn J, Sato K, Komatsuda T.
Title Evolution of the Grain Dispersal System in Barley.
Journal Cell
Abstract About 12,000 years ago in the Near East, humans began the transition from hunter-gathering to agriculture-based societies. Barley was a founder crop in this process, and the most important steps in its domestication were mutations in two adjacent, dominant, and complementary genes, through which grains were retained on the inflorescence at maturity, enabling effective harvesting. Independent recessive mutations in each of these genes caused cell wall thickening in a highly specific grain "disarticulation zone," converting the brittle floral axis (the rachis) of the wild-type into a tough, non-brittle form that promoted grain retention. By tracing the evolutionary history of allelic variation in both genes, we conclude that spatially and temporally independent selections of germplasm with a non-brittle rachis were made during the domestication of barley by farmers in the southern and northern regions of the Levant, actions that made a major contribution to the emergence of early agrarian societies.
Volume 162(3)
Pages 527-39
Published 2015-7-30
DOI 10.1016/j.cell.2015.07.002
PII S0092-8674(15)00839-9
PMID 26232223
MeSH Amino Acid Sequence Biological Evolution* Hordeum / anatomy & histology Hordeum / genetics Hordeum / physiology* Molecular Sequence Data Phenotype Plant Proteins / chemistry Plant Proteins / genetics Seed Dispersal* Sequence Alignment
IF 38.637
Times Cited 96
Barley Barley seed samples