The effect of field blocking on gain from selection
The effect of field blocking on gain from selection
复制标题
场阻塞对选择增益的影响
DOI：
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发表时间：
1966
期刊：
影响因子：
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通讯作者：
C. Cockerham
中科院分区：
文献类型：
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作者：
W. Schutz;C. Cockerham
遗传物质评价的一个重要选择是测试遗传条目的环境设计。本文从期望选择增益的角度比较了三种不完全区组设计，指出了该准则与均方误差准则和平均误差方差准则之间的关系。利用土壤异质性的经验指数来表征环境变异性。一般来说，在所有设计中，块信息的适当加权导致选择增益比没有块获得的增益增加。列入对照区似乎不是一个可取的替代办法。这些结果和所使用的方法的局限性的基因型环境相互作用的影响进行了讨论。
An important choice in the evaluation of genetic material is the environmental design for testing genetic entries. Three incomplete block designs are compared in this paper in terms of expected gain from selection, and the relationship between this criterion and the criteria of mean-square error and average error variance is pointed out. Use is made of an empirical index of soil heterogeneity to characterize the environmental variability. In general, the proper weighting of block information resulted in increased gain from selection over that obtained without blocking in all of the designs. The inclusion of check plots did not appear to be a desirable alternative. The effect of genotype by environment interactions on these results and some of the limitations of the methods used are discussed.