Genetic Analysis and Molecular Mapping of A Early Heading Date Mutant(ehd(t)) in Rice

doi:10.7668/hbnxb.2011.06.011

Abstract

Abstract: Rice heading date is an important agronomic trait． Mapping heading date gene is important for rice improvement． A rice(Oryza sativaL．) mutant with a early heading date，designated as edh(t),was found from a japonicarice variety Nipponbare． This early heading date mutant phenotype was stably expressed through successive five self-crossed generations，and its heading date was earlier 15 days than that in wild-type． Genetic analysis showed that the phenotype of edh(t) was controlled by a single dominant nuclear gene， temporarily designated as ehd(t). By means of molecular marker technique， the ehd(t)gene was mapped to an interval between two SSR markers RM223 and RM584 on chromosome 8 with two F₂segregating population，with genetic distances of 5． 2 cM and 6． 1 cM to each marker respectively． This is the basis for marker-assisted selection and map-based coloning this ehd(t)gene．

Key words: Rice, Early heading date gene, Genetic analysis, Molecular mapping

CLC Number:

LI Wan-chang, JIANG Li-na, WANG Jun-wei, YU Jiao-jiao. Genetic Analysis and Molecular Mapping of A Early Heading Date Mutant(ehd(t)) in Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2011, 26(6): 55-57. doi: 10.7668/hbnxb.2011.06.011.

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