Pedigree Analysis of Rice Breeding Lines in Fukushima Prefecture

Abstract

The pedigree of breeding lines of rice in Fukushima Agricultural Experiment Station (breeding lines) and cultivars (comparative varieties) in Fukushima Prefecture was analyzed. The ancestors making the greatest genetic contribution to breeding lines were Asahi followed by Aikoku, Oba, Kamenoo, Kiryoyoshi, Joshu and Kyotoshinasahi, in this order. It was recognized that the breeding lines showed a high coefficient of parentage to Asahi, Oba and Kamenoo, differing from the other breeding lines reported to date. In breeding lines, the parentage to Koshihikari and Kamenoo showed a significant negative correlation with the grain quality and the coefficient of parentage to Asahi showed a significant positive correlation with the grain quality. The coefficient of parentage to Koshihikari and Norin 22 showed a significant positive correlation with eating quality, but that of the breeding lines did not. It was considered that new parental materials were necessary to breed lines with high eating quality, because all of the breeding lines showed a high coefficient of parentage to Koshihikari. Based on the genetic background defined by this pedigree analysis, the parents for crossing may be selected more rationally.