Identification and Inheritance of Fertility Restorer Genes for ‘tour’ CMS in Rapeseed (Brassica napusL.)

摘要

AbstractEighteen genotypes ofBrassica napuswere crossed to a cytoplasmic male sterile (CMS) line ofB. napusBO 15 carryingB. tournefortiicytoplasm (‘tour’ cytoplasm). Fourteen genotypes were found to be stable maintainers of the ‘tour’ CMS. Of the remaining four genotypes, GSL‐1 and ‘Asahi‐natane’ were found to be heterozygous and ‘Mangun’ and ‘Yudal’ were homozygous for the restorer gene. Analysis of the F1and F2progenies of (CMS) BO 15 בMangun’ and (CMS) BO 15 בYudal’ showed that fertility restoration is controlled by a single dominant gene. The availability of a number of stable maintainer lines and the simple inheritance pattern of fertility restorer gene makes ‘tour’ CMS a useful system f