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首页> 外文期刊>Turkish Journal of Agriculture & Forestry >Selection for Test Weight and Kernel Weight in High Yielding Wheat Using a Safety-First Index
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Selection for Test Weight and Kernel Weight in High Yielding Wheat Using a Safety-First Index

机译：使用安全第一指标选择高产小麦的试验重量和籽粒重量

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Five breeding lines and 4 cultivars were grown in replicated trials at 1 location in 1999-2000 and 2 locations in 2000-2001 cropping seasons in izmir in order to determine the usefulness of a safety-first selection index in making selection among high yielding wheat genotypes for test weight and thousand-kernel weight. Genotype x environment interactions were significant for these 2 quality traits. The regression coefficient (b(i)) of genotypes, variance (S-I(2)) of a genotype across environments, and a safety-first index (I-I) were calculated to evaluate the stability of genotypes for test weight and thousand-kernel weights. Wheat genotypes with lower b(i) values and small variance (S-2) across environments (the most stable ones) tended also to have lower means for these 2 traits, However, those genotypes with the largest value of index (I), which is considered desirable, were found to have the highest mean values for both test weight and thousand-kernel weight. The rank-correlation coefficient between (I-I) and ((Y) over bar (1)) values was significant for thousand-kernel weight. The ranking from I was significantly correlated with the rankings from the stability parameters b(I) and S-I(2) for test weight. The rank correlation coefficients between b(I) and S-2 for the 2 physical quality traits were highly significant and of similar magnitude (r = 0.983). It was concluded that a safety-first selection index can be useful in plant breeding for the improvement of wheat cultivars with enhanced stability and consistency of quality characteristics when genotype x environment interaction is present.
机译：在伊兹密尔的1999-2000年1个地点和2000-2001种植季节的2个地点的重复试验中，种植了5个育种系和4个品种，以确定安全第一选择指数在高产小麦基因型选择中的有用性用于测试重量和千内核重量。基因型x环境的相互作用对于这两个质量性状是重要的。计算基因型的回归系数（b（i）），基因型在整个环境中的方差（SI（2））和安全第一指标（II），以评估测试体重和千粒重的基因型稳定性。 b（i）值较低且在整个环境中（最稳定的）方差（S-2）小的小麦基因型也倾向于对这两个性状具有较低的均值，但是，那些具有最大指数（I）的基因型，对于测试重量和千粒重，发现被认为是理想的具有最高平均值。对于千内核重量，（I-I）和（（Y）超过小节（1））值之间的等级相关系数很显着。 I的等级与稳定性参数b（I）和S-I（2）的等级显着相关。两个物理质量性状的b（I）和S-2之间的等级相关系数非常显着，并且具有相似的幅度（r = 0.983）。结论是，当存在基因型×环境相互作用时，安全第一选择指数可用于植物育种，以改善小麦品种，具有增强的稳定性和品质特性的一致性。

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