Analysis of biological traits contributing to grain yield of short-to mid-season corn (Zea mays L.) hybrids
Analysis of biological traits contributing to grain yield of short-to mid-season corn (Zea mays L.) hybrids
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短中季玉米（Zea mays L.）杂交种籽粒产量生物学性状分析
DOI：
10.4141/cjps91-078
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发表时间：
1991
影响因子：
1.2
通讯作者：
R. Hamilton
中科院分区：
文献类型：
--
作者：
L. Dwyer;H. Hayhoe;W. Royds;R. Hamilton
短中季玉米产量相关生物学性状的研究鉴定了杂交种，并证明了确定它们对谷物产量的相对贡献的方法。在三个地点种植了9个成熟度等级为2350-2800玉米热量单位（CHU）的杂交种。测定了12个反映发育速率、营养生长和向籽粒分配的植株尺度性状。结果表明，不同品种、不同成熟度、不同地点间的产量差异显著（P≤0.05）。 杂种产量差异与杂种性状值的差异有关。通过一系列多元线性回归分析，筛选出影响产量差异的性状。测试年异常温暖（所有网站有超过2800 CHU）和性状相关的植物的营养身高和达到该身高所需的时间是最一致的产量相关。 关键词：植物性状，玉米，回归，产量，育种
Biological traits related to grain yield of short- to mid-season corn (Zea mays L.) hybrids were identified, and an approach to determine their relative contribution to grain yield was demonstrated. Nine hybrids with maturity ratings of 2350–2800 corn heat units (CHU) were grown at three sites. Twelve plant-scale traits were measured which reflected development rate, vegetative growth and partitioning to the grain. Analyses indicated significant differences (P ≤ 0.05) in grain yield among hybrids, maturity ratings and sites. Hybrid yield differences were related to hybrid differences in trait values. Traits contributing to yield differences were also selected by a series of multiple linear regressions. The test year was abnormally warm (all sites had more than 2800 CHU) and traits related to the vegetative stature of the plant and the time required to reach that stature were most consistently correlated with yield. Key words: Plant traits, maize, regression, grain yield, breeding