PJB-2009-300
GENETIC ANALYSIS FOR DISTORTED SEGREGATION OF EF-1 GENE IN RICE
MUHAMMAD JAMIL1, KUI JAE LEE2 AND EUI SHIK RHA3*
Abstract
The present study was carried out to assess the genetic mechanism of the distorted segregation of earliness-1 gene (Ef-1) in cross between Indica and Japonica linkage tester. The linkage relationship was investigated in F2 populations between the Ef-1 gene on chromosome 10 and a new gametophyte gene. Distorted segregation of Ef-1 appeared in F2 populations and it was not related to the F1 seed sterility and the F2 seed fertility. The ratios of the distorted segregation did not vary significantly among F2 populations derived from F1 hybrids of the same cross combinations. Ef-1 gene in B1F1 hybrids derived from the reciprocal backcrosses clearly showed that the distorted segregation was caused by a new gametophyte gene. The recombination value was calculated to be 24.2 ± 5.4% between Ef-1 gene and gametophyte gene.
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