Genetic evidence for differential selection of grain and embryo weight during wheat evolution under domestication.

ABSTRACT: Wheat is one of the Neolithic founder crops domesticated ~10 500 years ago. Following the domestication episode, its evolution under domestication has resulted in various genetic modifications. Grain weight, embryo weight, and the interaction between those factors were examined among domesticated durum wheat and its direct progenitor, wild emmer wheat. Experimental data show that grain weight has increased over the course of wheat evolution without any parallel change in embryo weight, resulting in a significantly reduced (30%) embryo weight/grain weight ratio in domesticated wheat. The genetic factors associated with these modifications were further investigated using a population of recombinant inbred substitution lines that segregated for chromosome 2A. A cluster of loci affecting grain

SUBMITTER: Golan G 

PROVIDER: S-EPMC4566971 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature