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首页> 外文期刊>Spanish Journal of Agricultural Research >Short communication. Plant density effect on the individual plant to plant yield variability expressed as coefficient of variation in barley
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Short communication. Plant density effect on the individual plant to plant yield variability expressed as coefficient of variation in barley

机译：简短的沟通。植物密度对单株产量的影响，以大麦的变异系数表示

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The effect of plant density on the coefficient of variation (CV) for individual plant yield was studied in barley (Hordeum vulgare L.). An F2 population originating from the cross Niki x Carina was planted in three densities: high (51.32 plants/square m), intermediate (4.61 plants/square m), and low (1.15 plants/square m) using the honeycomb design. In each of the experiments, the most promising 15 plants were selected based on the individual plant yield. Progeny (F3) of the 30 plants selected from the intermediate and the low plant density were grown the following year in two experiments under an intermediate and low density. It was observed that in the F2 population the CV was reduced from 71 to 55% when the density reduced from 51.32 to 4.61 plants/square m, whereas the CV value was increased when the density was further reduced to 1.15 plants/square m. Similarly, the following year the CV was increased from 39 to 56% when the density was decreased from 4.61 to 1.15 plants/square m in the F3 generation, and from 22 to 58% in the control. It was concluded that for barley an optimum plant density might exist under which the CV for individual plant yield is minimized and therefore the effectiveness of selection might be optimized.
机译：在大麦（Hordeum vulgare L.）中研究了植物密度对单株产量变异系数（CV）的影响。使用蜂窝设计，以三种密度种植了来自Niki x Carina杂交的F2种群：高（51.32株/平方米），中（4.61株/平方米）和低（1.15株/平方米）。在每个实验中，根据单个植物的产量选择了最有前途的15种植物。第二年，在中等密度和低密度下的两个实验中，从中等密度和低密度植物中选出的30株植物的子代（F3）得以生长。观察到，在F2种群中，当密度从51.32植株/平方米降低到4.61植株/平方米时，CV从71降低到55％，而当密度进一步降低到1.15植株/平方米时，CV值增加。同样，第二年，当F3代植物的密度从4.61植株/平方米降低到1.15植株/平方米时，CV从39％增至56％，而对照植株从22％增至58％。结论是，对于大麦而言，可能存在最佳植物密度，在该密度下，单个植物产量的CV最小，因此选择效率可能得到优化。

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