A doubled haploid population, derived from anther culture of F hybrid between a typical indica cv. and a japonica cv. has been used to investigate the seedling cold tolerance (SCT) in growth cabinet. By dynamically an...A doubled haploid population, derived from anther culture of F hybrid between a typical indica cv. and a japonica cv. has been used to investigate the seedling cold tolerance (SCT) in growth cabinet. By dynamically analyzing every day’s survival percentages of the parents and DH lines under 7-d cold plus 9-d normal temperature condition, the guantitative trait loci (QTLs) for SCT have been mapped based on a molecular linkage map constructed from this population. The results show that two parents had significant differences in SCT and the segregation of SCT in DH lines was basically a continuous distribution with most serious injury on the 6th d of the cold treatment. A total of 4 QTLs for SCT have been identified on chromosomes 1, 2, 3 and 4 respectively. The additive effects of qSCT-1, qSCT-2 and qSCT-3 have been contributed by the japonica ev JX17, but that of qSCT-4 has been contributed by the indica cv ZYQ8. The mechanism of SCT seems complicated since the above 4 QTLs detected at different stages展开更多
文摘A doubled haploid population, derived from anther culture of F hybrid between a typical indica cv. and a japonica cv. has been used to investigate the seedling cold tolerance (SCT) in growth cabinet. By dynamically analyzing every day’s survival percentages of the parents and DH lines under 7-d cold plus 9-d normal temperature condition, the guantitative trait loci (QTLs) for SCT have been mapped based on a molecular linkage map constructed from this population. The results show that two parents had significant differences in SCT and the segregation of SCT in DH lines was basically a continuous distribution with most serious injury on the 6th d of the cold treatment. A total of 4 QTLs for SCT have been identified on chromosomes 1, 2, 3 and 4 respectively. The additive effects of qSCT-1, qSCT-2 and qSCT-3 have been contributed by the japonica ev JX17, but that of qSCT-4 has been contributed by the indica cv ZYQ8. The mechanism of SCT seems complicated since the above 4 QTLs detected at different stages
