Genetic variability of mineral concentrations in Festuca arundinacea Schreb.
Genetic variability of mineral concentrations in Festuca arundinacea Schreb.
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Festuca arundinacea Schreb 矿物质浓度的遗传变异。
DOI：
10.1007/bf00275779
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发表时间：
2004
影响因子：
5.4
通讯作者：
D. Sleper
中科院分区：
文献类型：
--
作者：
Henry T. Nguyen;D. Sleper
本文以高羊茅（Festuca arundinacea Schreb.）在所有可能的组合中交配，以确定在广泛的遗传基础群体中Mg，Ca，K和P浓度的遗传变异的性质。一般配合力均方显着的大多数变量，而特定配合力均方在大多数情况下，表明加性遗传方差是更重要的。基因型x年的相互作用是显着的大多数变量，这表明选择应在许多环境中进行评估。广义遗传力估计的基础上，父母和后代的方差分量一般高的P，K，Ca和Mg，但低的比例K/（Ca + Mg）。狭义遗传力的这些矿物接近广义值，因为加性遗传方差是最大的组成部分，总的遗传变异。矿质元素含量与牧草干物质产量的相关性较低。得出的结论是，存在足够的遗传变异，以提高矿物质浓度，而不改变牧草干物质产量。
SummaryNine randomly chosen clones of tall fescue (Festuca arundinacea Schreb.) were mated in all possible combinations to determine the nature of genetic variation for Mg, Ca, K, and P concentrations in a broad genetic base population. General combining ability mean squares were significant for most variables, whereas specific combining ability mean squares were not significant in most instances indicating that additive genetic variance was more important. Genotype x year interactions were significant for most variables, suggesting that selection should be evaluated over many environments. Broad-sense heritability estimates based on parental and progeny variance components were generally high for P, K, Ca, and Mg but low for the ratio K/(Ca + Mg). Narrow-sense heritabilities for these minerals were close to the broad sense values since the additive genetic variance was the largest component of the total genetic variation. Correlations between mineral concentrations and herbage dry matter yield were low. It was concluded that adequate genetic variation exists to improve mineral concentration without altering herbage dry matter yields.