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首页> 外文学位 >DIALLEL ANALYSIS OF RATE AND DURATION OF GRAIN FILL AND OTHER AGRONOMIC TRAITS IN EIGHT INBRED LINES OF MAIZE (ZEA MAYS L.).
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DIALLEL ANALYSIS OF RATE AND DURATION OF GRAIN FILL AND OTHER AGRONOMIC TRAITS IN EIGHT INBRED LINES OF MAIZE (ZEA MAYS L.).

机译：对八种玉米自交系的籽粒灌浆和其他农艺性状的发生率和持续时间的双重分析。

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摘要

Fifty-six crosses (including reciprocals) and their eight inbred parents were grown to determine if there was genetic variation in the rate and duration of grain filling and other agronomic traits. The nature of gene control, reciprocal effects, environmental influences, and the relationships among these traits also were studied. F(,1)'s and reciprocal crosses were grown at two locations for two years in a randomized complete block design with three replications at each location.;General combining ability (GCA) effects were highly significant for the rate of fill, yield, AFPD, rows ear('-1), and plant height. GCA effects were more important than specific combining ability (SCA) effects for EFPD. Both GCA and SCA effects were important for lag period. SCA effects were highly significant for grain moisture and kernel weight. Reciprocal maternal and non-maternal effects were not significant for most traits.;EFPD may be directly or indirectly related to grain yield. Rate of fill was limiting for the material studied. There was considerable variability for most traits, except EFPD. Environmental influences were important in the expression of these traits. Most traits were under additive genetic control and hence selection should be beneficial. However, fast screening methods need to be developed especially for rate, EFPD and lag period.;Significant differences existed for rate of fill, grain moisture percentage, yield, actual filling period duration (AFPD), plant and ear height, days to silk, row number, kernel number, ear length and circumference among inbreds and hybrids. There were also significant differences in lag period and effective filling period duration (EEPD) among hybrids but not among inbreds. Grain yield was positively correlated with rate and duration of grain fill. Hybrids had longer lag periods, higher rates of fill, yield, ear and plant height, and lower grain moisture than the average of their parents. EFPD varied considerably among hybrids in comparison with mid-parent values. Hybrids generally flowered earlier, had more rows ear('-1), kernels row('-1), heavier kernels and longer AFPD than their inbred parents. In most cases, reciprocal effects were not significant. Year, location, genotype, first- and second-order interaction components were important for all traits except ear circumference.
机译：种植了56个杂交种（包括倒数）及其8个近交亲本，以确定籽粒灌浆的速率和持续时间以及其他农艺性状是否存在遗传变异。还研究了基因控制的性质，相互影响，环境影响以及这些特征之间的关系。 F（，1）和对等杂交在随机的完整块设计中在两个位置生长了两年，每个位置重复三遍;总的结合能力（GCA）效应对于填充率，产量， AFPD，排穗（'-1）和株高。对于EFPD，GCA的作用比特异性结合能力（SCA）的作用更为重要。 GCA和SCA的影响对于滞后期都很重要。 SCA效应对于谷物水分和籽粒重量非常重要。多数性状对母本和非母本的影响均不显着。EFPD可能与谷物产量直接或间接相关。填充速率限制了所研究的材料。除EFPD外，大多数性状都有相当大的变异性。在这些特征的表达中，环境影响很重要。大多数性状都处于加性遗传控制之下，因此选择应该是有益的。但是，需要特别针对速率，EFPD和滞后期开发快速筛选方法。；填充率，谷物水分百分比，产量，实际填充期持续时间（AFPD），植物和穗高，到丝的天数，自交系和杂种的行号，仁号，穗长和周长。杂种之间的滞后期和有效灌浆期持续时间（EEPD）也存在显着差异，而近交者之间没有显着差异。籽粒产量与籽粒灌浆速率和持续时间呈正相关。杂种的滞后时间更长，填充率，产量，穗和株高更高，且谷物水分含量低于其父母的平均水平。与中亲相比，EFPD在杂种之间的差异很大。杂种通常开花较早，比自交亲本有更多的排穗（'-1），籽粒排（'-1），较重的籽粒和更长的AFPD。在大多数情况下，相互影响并不明显。年，位置，基因型，一阶和二阶相互作用成分对除耳围以外的所有特征都很重要。

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  • 作者

    KIMANI, PAUL MACHARIA.;

  • 作者单位

    The University of Wisconsin - Madison.;

  • 授予单位 The University of Wisconsin - Madison.;
  • 学科 Agriculture Agronomy.
  • 学位 Ph.D.
  • 年度 1983
  • 页码 267 p.
  • 总页数 267
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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