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中国农学通报

中国农学通报 ›› 2014, Vol. 30 ›› Issue (15): 168-172.doi: 10.11924/j.issn.1000-6850.2013-2491

所属专题： 水稻

• 农学 农业基础科学 • 上一篇    下一篇

南方稻区早籼产量与主要经济性状的分析

吕锐玲 金红梅 周强 涂军明 梅凯华 王欢 张盛   

  • 收稿日期:2013-09-21 修回日期:2013-10-16 出版日期:2014-05-25 发布日期:2014-05-25
  • 基金资助:
    湖北省农业科技创新中心科技专项 “农作物新品种选育” (2007-620-001-03)。

Analysis of the Yield and Major Economic Traits of Early Indica Rice

  • Received:2013-09-21 Revised:2013-10-16 Online:2014-05-25 Published:2014-05-25

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摘要： 为揭示主要经济性状对南方稻区早籼产量的影响规律，采用相关、通径、主成分和回归分析方法，对2009—2011年南方稻区早籼区域试验29个水稻品种或组合的产量及主要经济性状进行统计分析。结果表明：经济性状的变异系数最大的是有效穗(12.78%)；偏相关分析结果表明产量与有效穗(0.5632**)、千粒重(0.7456**)呈极显著正相关；主成分分析结果表明早籼产量信息的主要因子是粒数因子、贡献率为39.93%，生育期因子、贡献率为20.28%，粒重因子、贡献率为17.30%；从主成分第一特征向量分析结果看，负荷量较大因子是每穗总粒数和每穗实粒数，前3个主成分累积贡献率就达到77.51%。通径分析表明4个产量构成因素的直接通径系数的大小依次为：总粒数(Py2=0.9601)>千粒重(Py4=0.7309)>结实率(Py3=0.6872)>有效穗(Py1=0.5411)。回归分析结果表明早籼产量的72.56%是由有效穗、总粒数、结实率、千粒重决定。据此结果，提出了早籼高产育种和高产栽培的主攻方向。

关键词: 扦插生长, 扦插生长

Abstract: In order to reveal the effects of the main economic traits on yield of early indica rice, 29 varieties (lines) in early indica rice regional trials in Southern China from 2009 to 2011 were analyzed by? statistical methods such as correlation analysis, path analysis and principal component analysis. The results showed that: effective spikes number (12.78%) had the largest coefficient of variation in all the main economic traits; partial correlation analysis showed that the yield and effective panicle number (0.5632**), 1000 grain weight (0.7456**) showed a highly significant positive correlation; principal component analysis showed that the main factor of the early indica rice yield information was grains factors, the contribution rate of 39.93%, growth period factor, the contribution rate of 20.28%, grain weight factor, the contribution rate of 17.30%; the first three principal components cumulative contribution rate reached 77.51%. Path analysis showed that four yield components of direct path coefficient: total grains number (Py2 = 0.9601) > grain weight (Py4 = 0.7309) > seed setting rate (Py3 = 0.6872) > effective panicle number (Py1 = 0.5411). Regression analysis showed that the 72.56% yield was decided by effective panicle number, total grains number, seed setting rate, grain weight. Accordingly these results, the main direction of breeding and cultivation of early indica rice is presented.