Correlation Between Yield and Yield Components of Hybrid Mid-season Rice
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摘要: 通过对福州市2007~2009年中稻新品种联合区试的30个杂交中稻品种的产量和产量构成因素观测数据分析,为鉴定、评选高产稳产中稻新品种及配套栽培技术提供科学依据。差异性分析表明,粒重变异系数最小,性状相对稳定;回归分析结果显示5个产量构成因素与产量呈正相关关系,其中丛穗数、穗实粒数和结实率相关性达显著水平;偏相关分析表明,丛穗数、穗实粒数和粒重与产量呈显著正相关,穗总粒数和结实率与产量的偏相关系数为负值,但不显著;通径分析表明,丛穗数、穗实粒数和粒重对产量的直接效应均为正值,其中穗实粒数的直接贡献最大,丛穗数、穗实粒数和粒重对产量的间接效应均为负效应,其中丛穗数通过粒重的间接负效应值较大。综合上述分析结果,在对福州地区杂交中稻新品种的筛选时,穗实粒数和丛穗数应作为优先考察的因素,同时兼顾粒重和穗总粒数,并要求相对稳定的结实率。Abstract: Yield and yield components of 30 mid-season rice hybrids were studied in a joint regional field test in Fuzhou during 2007-2009.Data for identifying and selecting new stable,high-yield,mid-season rice varieties,as well as,establishing the cultivation technology was obtained.A differential analysis indicated that the difference on the variation coefficients for grain weight was the smallest among all,and the characteristics of the varieties tended to be relatively stable.The regression analysis showed that the 5 yield components positively correlated with yield,with the panicle number,filled spikelets per panicle and seed-setting rate significantly correlated.The partial correlation analysis showed that the panicle number,filled spikelets per panicle and grain weight had significant positive correlations with yield,while the partial correlation coefficient between spikelets per panicle or seed-setting rate and yield was negative,and not significant.The path analysis indicated that the direct effects of the panicle number,filled spikelets per panicle and grain weight on yield were all positive,and the filled spikelets per panicle contributed most greatly to the effect.All indirect effects of the panicle number,filled spikelets per panicle and grain weight on yield were negative,with the panicle number affected by the grain weight relatively high.When all factors were taken into consideration,the filled spikelets per panicle and panicle number should be the critical criteria for selection.However,at the same time,the grain weight and spikelets per panicle,as well as a relatively stable seed-setting rate could not be neglected.
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Key words:
- mid-season rice hybrids /
- yield components /
- correlation /
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[1] 郭玉春,梁康迳,吴杏春,等.新株型水稻物质生产与产量形成的生理生态研究,(Ⅲ)单株产量与穗部性状的相关和通径分析[J].福建稻麦科技,2002,(2):1-4. [2] 唐启义,冯明光.DPS数据处理系统[M].北京:科学出版社,2007.
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