中国油料作物学报 ›› 2017, Vol. 39 ›› Issue (6): 785-.doi: 10.7505/j.issn.1007-9084.2017.06.009

Previous Articles     Next Articles

Quantitative trait locus mapping for sesame capsule size


  1. 1. Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences/ Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China; 2. College of Life Sciences of Hubei University, Wuhan 430062, China
    Abstract: For
  • Online:2017-12-28 Published:2018-03-19


sesame QTL on capsule size, a genetic map was constructed based on 430 recombinant inbred lines derived from Zhongzhi 13 × ZZM2748. Capsule length, width and thickness were investigated on 2 capsule positions (middle and flanking) in 3 environments. Results showed broad ranges of length (1.54 to 4.39 cm), width (0.42 to 1.31 cm) and thickness (0.37 to 1.33 cm) respectively. Significant correlations were found between width and thickness in the capsules length and thickness of the capsules at same position. The length or width between the middle and flanking capsules also showed significant correlation. In combination with the phenotypes and genotypes of the RIL population, a total of 40 QTLs were detected with phenotype contribution rates varied from 2.00% to 23.67%. Among them, 9, 4, and 5 loci were detected for length, width and thickness of middle capsule, and 10, 8 and 4 loci were for length, width and thickness of flanking capsule. The loci qMCL13.1, qMCW9.1 and (13.77%) had the highest contribution rates (13.69% in average) to length, width and thickness of middle capsule, and qFCL11.1 (9.31%), qFCW9.1 (19.65%), qFCT9.1 (9.41%) contributed the largest variations for length, width and thickness of flanking capsule. There were 21 QTLs repeatedly observed in more than one environment and explained the phenotype variation from 2.00 to 23.67% with 9 detected across all three environments, and some of them exhibited pleiotropic effect on different traits. This study provided an insight for sesame yield related traits, and a foundation to identify capsule genes in the future.

Key words:  sesame, RIL population, capsule size, QTL mapping