四川农业大学学报 ›› 1996, Vol. 14 ›› Issue (02): 162-166.doi: 10.16036/j.issn.1000-2650.1996.02.003

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杂交早稻主要性状分析及高产育种探索

蒋开锋, 郑家奎, 文宏灿   

  1. 四川省农科院水稻高粱研究所, 泸州市 646100
  • 收稿日期:1995-07-13 出版日期:1996-06-30 发布日期:2017-03-07

ANALYSIS ON THE MAIN TRAITS AND DISCUSSION ON HIGH-YIELD BREEDING OF EARLY-SEASON HYBRID RICE

Jiang Kaifen, et al   

  1. Rice and Sorghum Research Institute, Sichuan Academyof Agricultural Sciences/Luuhou, Sichuan, China 646100
  • Received:1995-07-13 Online:1996-06-30 Published:2017-03-07

摘要: 用相关分析、通经分析和主成份分析方法对近年来育成的一些杂交早稻组合的主要性状分析表明:1.产量和产量性状及产量性状间有较为复杂的相关关系,而以每穗实粒数和株高对产量的直接作用最大;2.生育期对产量的直接作用和其它性状通过该性状的间接作用很小,说明早稻生育期范围内,实现高产是可能的;3.按累积贡献率≥85%,确定了穗平着粒数、结实率、千粒重和穗长四个主成份;4.对提高杂交早稻的育种途径和策略进行了探讨。

关键词: 早稻[49EJ], 杂交[45CC, 49DB], 经济性状, 相关分析[32A, 32DA], 主成份分析[30R], 高产育种

Abstract: Path coefficiency analysis and principle component analysis on the main traits of early-season hybrid rice were carried out by using 16 early-season hybrid rice combinations. The results slow as follows:There were complicated correlation ships between yield and yield components, and between yield components. Filled seed per panicle and plant height had higher direct contribution to high grain yield. However, the direct contribution of growth duration and the indirect contrihutions of other traits through growth duration to high yield were comparatively unsignificant. Thus, it is quite possible to increase the grain yield of early-season hybrid rice. According to the cumulative pet. of variability >85, four principle components, including spikelet number per panicle, seed percentage, 1000-grain weight and panicle length, were selected out. In the end, the breeding strategy for improving early-season hybrid rice was discussed.

Key words: EARLY RICE, HYBRIDIZATION, ECONOMIC TRAIT, CORRELATION ANALYSIS, PRINCIPAL COMPONENT ANALYSIS, HIGH-YIELD BREEDING

中图分类号: 

  • S511.1