云麦52产量与产量相关性状的相关分析和通径分析

目的]优质、高产、多抗小麦新品种云麦52的产量与产量相关性状的相关性和明确云麦52的各产量相关性状对其产量的贡献大小.方法]利用2005～2007年度云南省小麦品种区域试验数据进行相关分析和通径分析.结果]相关分析表明:云麦52的产量与小穗数、最高茎蘖数和穗粒数与产量极显著正相关(r=0.726**、0.717**和0.695**),千粒重与产量显著正相关(r=0.491*),退化小穗数与产量显著负相关(r=-0.451*),与基本苗、有效穗和成穗率相关性不显著;而偏相关分析表明云麦52的产量仅与小穗数成极显著正相关(R=0.711**)和千粒重成显著正相关(R=0.641*),其余6个性状相关均不显著.通径分析表明:小穗数(P=0.595)、最高茎蘖数(P=0.462)、千粒重(P=0.263)对云麦52产量的贡献较大.结论]在优质、高产、多抗小麦新品种云麦52的推广应用中,云麦52在分蘖期和拔节期增加肥水的供应保证其大穗和高分蘖力的特性以及高千粒重,同时协调发展其他产量相关性状有利于云麦52产量的提高.

Correlation Analysis and Path Analysis between Yield and Yield-Related Traits of Yunmai 52

Objective] This study was conducted to understand the relationship between yield-related traits and yield of Yunmai 52 which is a high-quality high-yield multi-resistant new wheat variety,and make contribution of yield-related traits to the yield of Yunmai 52 clear.Method] Wheat variety regional trial data in Yunnan Province in 2005-2007 were subjected to correlation analysis and path analysis in the paper.Result] Correlationanalysis showed that the yield of Yunmai 52 was invery significant positive correlation with spikelet number per ear,maximum tiller number and grains per ear (r=0.726**,0.717** and 0.695**,respectively),in significant positive correlation with 1 000-grain weight (r=0.491*),but in significant negative correlation with sterile spikelet number per ear,and in non-significant correlation with basic seedlings,effective ears and percentage of ear bearing tillers.Partial correlation analysis showed that the yield of Yunmai 52 was in very significant positive correlation with spikelet number per ear (r=0.711 **),significant positive correlation with 1 000-grain weight (r=0.641*),but in non-significant correlation with other 6 traits.Path analysis showed that spikelet number per ear (P=0.595),maximum tiller number (P=0.462) and 1 000-grain weight (P=0.263) had more contribution to yield of Yunmai 52.Conclusion] Therefore,in extension and application of Yunmai 52that is a high-quality high-yield multi-resistant new wheat variety,supply of fertilizer and water should be increased in tillering stage and jointing stage,to ensure its characteristics of high tillering ability and large ear,as well as high 1 000-grain weight,and coordinated development of other yield-related traits is beneficial to improvement of yield of Yunmai 52.