Ys. Sodhi et al., IDENTIFICATION AND INHERITANCE OF FERTILITY RESTORER GENES FOR TOUR CMS IN RAPESEED (BRASSICA-NAPUS L), Plant breeding, 112(3), 1994, pp. 223-227
Eighteen genotypes of Brassica napus were crossed to a cytoplasmic mal
e sterile (CMS) line of B. napus BO15 carrying B. tournefortii cytopla
sm ('tour' cytoplasm). Fourteen genotypes were found to be stable main
tainers 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 F1 and F2 proge
nies of (CMS) BO15 x 'Mangun' and (CMS) BO15 x 'Yudal' showed that fer
tility restoration is controlled by a single dominant gene. The availa
bility of a number of stable maintainer lines and the simple inheritan
ce pattern of fertility restorer gene makes 'tour' CMS a useful system
for hybrid seed production in rapeseed.