Genetic Analysis and Gene Mapping of a Rice Spreadingpanicle Mutant
? These authors contributed equally to this paper
Received date: 2014-04-01
Accepted date: 2014-05-14
Online published: 2015-04-10
Rice is the most important crop in our country, and the panicle traits determine the yield and quality of rice. From recombinant inbred lines derived from a cross between Akihikari (japonica) and Qishanzhan (indica), a spreading- panicle mutant (sp) was found that had panicle branches extending outward, increased angle between primary branch and rachis and the panicle grew around this. As compared with the wild-type parent, sp showed significantly reduced panicle weight, grain weight per panicle, 1 000 grain weight, grain width and grain thickness, which implied that the sp gene participated in regulating panicle formation and glumous flower development. Genetic analysis showed that the sp phenotype was controlled by a single dominance nuclear gene. Primary mapping based on the F2 line between sp and 02428 showed that the sp gene was on the long arm of chromosome 4 and at a 62.9 kb region between markers E3 and RM17578. This information provides a basis for cloning this gene and functional mechanism analysis.
Dan Liu, Jiayu Wang, Jin Liu, Dianrong Ma, Minghui Zhao, Wenfu Chen . Genetic Analysis and Gene Mapping of a Rice Spreadingpanicle Mutant[J]. Chinese Bulletin of Botany, 2015 , 50(2) : 198 -205 . DOI: 10.3724/SP.J.1259.2015.00198
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