Hashemi Parastoo Sadat, Mohammadi Abdollah, Alizadeh Bahram, Mostafavi Khodadad, Amiri Oghan Hassan
Department of Agronomy and Plant Breeding, Karaj Branch Islamic Azad University Karaj Iran.
Oil Crops Research Department, Seed and Plant Improvement Institute Agricultural Research, Education and Extension Organization (AREEO) Karaj Iran.
Food Sci Nutr. 2024 Feb 16;12(5):3628-3641. doi: 10.1002/fsn3.4033. eCollection 2024 May.
The production of high-oil-yielding hybrid varieties is a primary objective in oilseed rape ( L.) breeding programs. Biometric genetic experiments such as line × tester provide valuable insights into the genetic structure of traits associated with high oil yield.
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.
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.
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.
培育高油产量杂交品种是油菜育种计划的主要目标。诸如系×测验种等生物统计学遗传实验为与高油产量相关性状的遗传结构提供了有价值的见解。
本研究对21个冬油菜杂交种进行了评估，这些杂交种由3个恢复系与7个细胞质雄性不育系杂交产生。实验采用基于完全随机区组设计的系×测验种试验。本研究对物候、农艺、产量和油产量构成因素进行了评估。还采用了理想基因型选择指数（SIIG）方法，以同时基于所有研究性状鉴定优良杂交种。
在所获得的杂交种与对照品种之间观察到显著差异。遗传力分析表明，物候性状主要受加性效应控制，而农艺和品质性状主要受非加性基因效应影响。广义和狭义遗传力均表现出较宽的范围，突出了遗传变异的重要性。值得注意的是，杂交种T1×L5、T1×L6和T3×L1的特殊配合力值分别显著为394.74、541.73和1236.79，使其成为提高种子产量的最佳特殊组合。基于SIIG指数，杂交种T3×L1、T1×L5、T1×L3和T2×L3成为具有理想农艺性状的高油产量杂交种。
通过系×测验种和SIIG方法鉴定出的优良杂交种有望在油菜育种计划中用于培育具有理想农艺性状的高产油菜品种。
