Correlations among grain quality traits of different hybrid rice in different years
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摘要: 对2003～2005年来自福建省水稻品种区域试验的282个早籼、中籼和晚籼杂交稻品种的12项稻米品质指标进行了相关性分析。结果表明:不同年份和稻作类型12项品质性状两两间均表现正向和负向的显著或极显著相关的各有3组:糙米率与精米率、垩白粒率与垩白度、胶稠度与质量指数和垩白粒率与透明度、垩白粒率与质量指数、直链淀粉含量与质量指数。不同年份和稻作类型12项品质性状两两间均表现正向和负向的显著或极显著相关的各有1组:早、中型杂交稻的垩白粒率与直链淀粉含量;早、晚型杂交稻的胶稠度与直链淀粉含量;中、晚型杂交稻的整精米率与粒长。研究结果还表明这9组性状间的相关极明显和稳定,不因年份、稻作类型和品种的不同而有变化,可直接应用于杂交稻优质育种中。Abstract: An analysis to determine the correlations of the grain quality traits of different hybrid rice in different years was conducted in various regions in Fujian from 2003 to 2005.Twelve indices were employed for the quality evaluation on 282 hybrid rice varieties,including early indica,medium season indica and late indica.Significant positive or negative correlations were detected between(a) brown rice rate and milled rice rate,(b) chalky rice rate and chalkiness degree,(c) gel consistency and quality indices,(d) chalky rice rate and transparency,(e) chalky rice rate and quality indices,and(f) amylose content and quality indices in the 3 rice types;and,also between(a) chalky rice rate and amylose content in early and medium season hybrid rice,(b) gel consistency and amylose content in early and late hybrid rice,and(c) head milled rice rate and grain length of medium and late hybrid rice.It was also found that the correlations among 9 traits were significant and stable regardless of year,rice types or varieties.The information might be of value in the breeding of hybrid rice.
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Key words:
- Indica hybrid rice /
- rice quality /
- correlation analysis
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