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以14个中韩粳稻品种为材料,在云南省水稻高产环境下进行试验,对产量及其构成因素进行了方差分析、相关分析和通径分析。结果表明:参试的中国品种其产量潜力明显高于韩国品种,高2t/hm2,相关分析表明,结实率高的品种可以获得高产。有效穗、穗粒数、结实率和千粒重对产量的直接效应为正值,其中以穗粒数的影响最大,直接通径系数为1.6437。对所有中韩粳稻品种而言,穗粒数是产量形成的主导因素,只有在稳定穗粒数的基础上,适当降低有效穗而大力改进穗部性状,即增加结实率和千粒重,可以进一步提高水稻产量的潜力。
Taking 14 varieties of japonica rice from China and South Korea as materials, experiments were carried out under the conditions of rice high yield in Yunnan Province. The variance analysis, correlation analysis and path analysis were conducted on yield and its components. The results showed that the yield potential of Chinese varieties tested was significantly higher than that of Korean varieties with 2t / hm2 high, and the correlation analysis showed that high yield could be obtained for the varieties with high seed setting rate. The direct effect of effective panicles, grains per spike, seed setting rate and 1000-grain weight on yield was positive, of which the effect of spikelets was the largest, and the direct path coefficient was 1.6437. For all varieties of japonica rice, grains per spike was the dominant factor in yield formation. Only by reducing the number of effective spikes and improving the panicle traits significantly, the grain yield could be further improved by increasing seed setting rate and 1000-grain weight Potential of rice yield.