INHERITANCE OF TEST WEIGHT AND ITS RELATIONSHIP WITH GRAIN-YIELD OF OAT
INHERITANCE OF TEST WEIGHT AND ITS RELATIONSHIP WITH GRAIN-YIELD OF OAT
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DOI：
10.2135/cropsci1991.0011183x003100010008x
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发表时间：
1991-01-01
期刊：
影响因子：
2.3
通讯作者：
FREY, KJ
中科院分区：
文献类型：
--
作者：
PIXLEY, KV;FREY, KJ
容重是衡量燕麦（Avena sativa L.）籽粒品质和市场价值的重要指标。本研究旨在评价燕麦优良种质容重的遗传变异程度，并探讨选育高容重燕麦品种的可行性。通过对13个单交组合各50个F2.3代随机株系的测定，估计了各组合的容重方差分量和遗传力。在爱荷华州的三个地点的每一个重复四次的试验中进行评估。试验体重在所有群体中均存在显著的遗传方差（P <0.01）。试验体重的遗传力，线平均值的基础上计算，范围从63%到91%。在10个群体中均发生了超亲分离，但低容重分离比高超亲分离多。高的遗传力，交配手段和中亲值之间的一般一致性，和分离线的分布的正态性表明，基因作用测试重量主要是加性的。试验重量和产量之间的相关性为正的8个群体，负的一个，和不显着的四个。结果表明，容重和产量的遗传方差显著，遗传力较高。由于容重与籽粒产量呈典型的正相关，因此选育容重提高的高产燕麦是可能的。
Test weight is a measure of grain quality and market value of oat (Avena sativa L.). This study was conducted to evaluate the degree of genetic variability for test weight among elite oat germplasm, and to assess the feasibility of breeding oat cultivars with increased test weight. Variance components and heritability of test weight were estimated by evaluating 50 random F2.3 lines from each of 13 single-crosses. Evaluations were conducted in a trial with four replications at each of three locations in Iowa. Significant genetic variance (P less-than-or-equal-to 0.01) occurred for test weight in all populations. Heritabilities for test weight, calculated on a line-mean basis, ranged from 63 to 91%. Transgressive segregation occurred in 10 populations, but low-test-weight segregates were more frequent than high transgressive lines. High heritabilities, the general concurrence between mating means and midparent values, and normality of the distributions of segregating lines suggest that gene action for test weight is primarily additive. Correlations between test weight and grain yield were positive for eight populations, negative for one, and not significant for four. We found significant genetic variance and high heritability for test weight and grain yield. Because test weight and grain yield were typically positively correlated, breeding high-yielding oats with improved test weight should be possible.