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Inheritance of resistance to Fusarium wilt in some sesame crosses under field conditions

机译：田间条件下某些芝麻杂交品种对枯萎病抗性的遗传

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Lines of two generations (F3 and F4) from 15 crosses were screened for two successive seasons (2004 and 2005) for their reaction to Fusarium wilt disease under natural infection by Fusarium oxysporum f.sp. sesami. There was sufficient variability among all crosses and some lines could be valuable for further breeding programs for wilt disease resistance. Offspring of the crosses P1 × P6, P2 × P4 and P3 × P6 seem to be stable in their reaction to the disease in the years of evaluation, though with some segregation from one generation to another. The crosses P1 × P5, P2 × P6, P3 × P4 and P3 × P6 showed a resistant reaction through both generations as well as both seasons. They might be helpful and utilised for large scale cultivation or/and in hybridisation programs to develop resistant varieties with good yield potential. Heritability estimates were very high (more than 95%) in both generations during the two seasons, except for seed yield/plant in the F3 in the first season. This indicated that selection for both Fusarium wilt resistance and seed yield from these lines could be feasible and lead to resistant cultivars with seed yield potential. The results showed highly significant and positive correlations between lower infection in the F4’s and in F3’s through the two seasons. The highest significant correlation of the evaluated traits allowed the selection of some lines to be used in breeding programs. Also, highly significant positive correlations were detected between seed yield/plot of the F4’s in 2004 and the seed yield/plot of F4’s in 2005, but did not reach the significant level in the F3’s.Keywords:sesame; Fusarium oxysporum; wi disease resistance; seed yielddownload PDF Impact factor (Web of Science – Thomson Reuters) 2016: 0.742
机译：连续两个季节（2004年和2005年）筛选来自15个杂交的两代品系（F3和F4），以了解它们在天然被尖孢镰刀菌（Fusarium oxysporum f.sp.）侵染下对枯萎病的反应。芝麻所有杂交品种之间都存在足够的变异性，某些品系可能对进一步的抗青枯病育种计划有价值。在评估的年份中，杂交后代P1×P6，P2×P4和P3×P6似乎对疾病的反应是稳定的，尽管一代之间存在某种隔离。十字架P1×P5，P2×P6，P3×P4和P3×P6在两个世代以及两个季节都表现出抗性。它们可能有用并用于大规模种植或/和杂交计划中，以开发具有良好产量潜力的抗性品种。除了第一季F3的种子产量/植株，两个季节的两个世代的遗传力估计都很高（超过95％）。这表明从这些品系中选择枯萎病抗性和种子产量都是可行的，并导致具有种子产量潜力的抗性品种。结果显示，在两个季节中，F4和F3的较低感染率之间存在高度显着正相关。评估性状的最高显着相关性允许选择一些用于育种程序的品系。同样，在2004年F4的种子产量/图与2005年F4的种子产量/图之间检测到高度显着的正相关，但在F3的种子产量/图上未达到显着水平。尖孢镰刀菌;枯萎;抗病性种子产量下载PDF影响因子（科学技术网-汤森路透）2016：0.742

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