Abstract:
:Grain yield is controlled by quantitative trait loci (QTLs) derived from natural variations in many crop plants. Here we report the molecular characterization of a major rice grain yield QTL that acts through the determination of panicle architecture. The dominant allele at the DEP1 locus is a gain-of-function mutation causing truncation of a phosphatidylethanolamine-binding protein-like domain protein. The effect of this allele is to enhance meristematic activity, resulting in a reduced length of the inflorescence internode, an increased number of grains per panicle and a consequent increase in grain yield. This allele is common to many Chinese high-yielding rice varieties and likely represents a relatively recent introduction into the cultivated rice gene pool. We also show that a functionally equivalent allele is present in the temperate cereals and seems to have arisen before the divergence of the wheat and barley lineages.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Huang X,Qian Q,Liu Z,Sun H,He S,Luo D,Xia G,Chu C,Li J,Fu Xdoi
10.1038/ng.352subject
Has Abstractpub_date
2009-04-01 00:00:00pages
494-7issue
4eissn
1061-4036issn
1546-1718pii
ng.352journal_volume
41pub_type
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