PDF(Pubmed)
Abstract：
UNASSIGNED: The production of high-oil-yielding hybrid varieties is a primary objective in oilseed rape (Brassica napus L.) breeding programs. Biometric genetic experiments such as line × tester provide valuable insights into the genetic structure of traits associated with high oil yield.
UNASSIGNED: In this study, 21 winter hybrids of oilseed rape were evaluated, which were generated by crossing three restorers with seven CMS lines. The experiment was conducted using a line × tester experiment based on a completely randomized block design. Phenological, agronomic, yield, and oil yield components were assessed in this study. The ideal genotype selection index (SIIG) methodology was also employed to identify superior hybrids based on all studied traits simultaneously.
UNASSIGNED: Significant differences were observed between the obtained hybrids and the check cultivars. Heritability analysis revealed that phenological traits were primarily controlled by additive effects, while agronomic and qualitative traits were mainly influenced by non-additive gene effects. Both broad-sense and narrow-sense heritability exhibited a wide range, underscoring the importance of genetic variance. Notably, the hybrids T1 × L5, T1 × L6, and T3 × L1 showed significant specific combining ability values of 394.74, 541.73, and 1236.79, respectively, making them the top specific combinations for increasing seed yield. Based on the SIIG index, hybrids T3 × L1, T1 × L5, T1 × L3, and T2 × L3 emerged as high-oil-yielding hybrids with desirable agronomic traits.
UNASSIGNED: The identified superior hybrids by line × tester and SIIG approaches hold promise for the development of high-yielding oilseed rape cultivars with desirable agronomic traits in oilseed rape breeding programs.
UNASSIGNED: In this study, 21 winter hybrids of oilseed rape were evaluated, which were generated by crossing three restorers with seven CMS lines. The experiment was conducted using a line × tester experiment based on a completely randomized block design. Phenological, agronomic, yield, and oil yield components were assessed in this study. The ideal genotype selection index (SIIG) methodology was also employed to identify superior hybrids based on all studied traits simultaneously.
UNASSIGNED: Significant differences were observed between the obtained hybrids and the check cultivars. Heritability analysis revealed that phenological traits were primarily controlled by additive effects, while agronomic and qualitative traits were mainly influenced by non-additive gene effects. Both broad-sense and narrow-sense heritability exhibited a wide range, underscoring the importance of genetic variance. Notably, the hybrids T1 × L5, T1 × L6, and T3 × L1 showed significant specific combining ability values of 394.74, 541.73, and 1236.79, respectively, making them the top specific combinations for increasing seed yield. Based on the SIIG index, hybrids T3 × L1, T1 × L5, T1 × L3, and T2 × L3 emerged as high-oil-yielding hybrids with desirable agronomic traits.
UNASSIGNED: The identified superior hybrids by line × tester and SIIG approaches hold promise for the development of high-yielding oilseed rape cultivars with desirable agronomic traits in oilseed rape breeding programs.
摘要：
■生产高产油的杂交品种是油菜（BrassicanapusL.）育种计划的主要目标。诸如线×测试仪之类的生物识别遗传实验为与高油产量相关的性状的遗传结构提供了有价值的见解。
■在这项研究中，对21个油菜冬季杂种进行了评估，通过将三个恢复系与七个CMS系杂交而产生。实验是使用基于完全随机块设计的线×测试仪实验进行的。物候,农艺，产量，和油产率组分在这项研究中进行了评估。还采用了理想的基因型选择指数（SIG）方法，以同时基于所有研究的性状鉴定优良的杂种。
■在获得的杂种和对照品种之间观察到显着差异。遗传力分析表明，物候性状主要受加性效应控制，而农艺性状和质量性状主要受非加性基因效应的影响。广义和狭义的遗传力都表现出广泛的范围，强调遗传变异的重要性。值得注意的是,杂种T1×L5，T1×L6和T3×L1分别显示出394.74，541.73和1236.79的显着特异性结合能力值，使它们成为提高种子产量的顶级特定组合。根据SIG指数，杂种T3×L1，T1×L5，T1×L3和T2×L3成为具有理想农艺性状的高产油杂种。
■通过品系×测试仪和SIG方法确定的优良杂种有望在油菜育种计划中开发具有理想农艺性状的高产油菜品种。
■在这项研究中，对21个油菜冬季杂种进行了评估，通过将三个恢复系与七个CMS系杂交而产生。实验是使用基于完全随机块设计的线×测试仪实验进行的。物候,农艺，产量，和油产率组分在这项研究中进行了评估。还采用了理想的基因型选择指数（SIG）方法，以同时基于所有研究的性状鉴定优良的杂种。
■在获得的杂种和对照品种之间观察到显着差异。遗传力分析表明，物候性状主要受加性效应控制，而农艺性状和质量性状主要受非加性基因效应的影响。广义和狭义的遗传力都表现出广泛的范围，强调遗传变异的重要性。值得注意的是,杂种T1×L5，T1×L6和T3×L1分别显示出394.74，541.73和1236.79的显着特异性结合能力值，使它们成为提高种子产量的顶级特定组合。根据SIG指数，杂种T3×L1，T1×L5，T1×L3和T2×L3成为具有理想农艺性状的高产油杂种。
■通过品系×测试仪和SIG方法确定的优良杂种有望在油菜育种计划中开发具有理想农艺性状的高产油菜品种。
