The grey correlation degree was applied to reveal the relationship between yield and yield component factors of new wheat lines which were the Yunnan irrigated wheat regional trial materials.The result showed that the values of correlation degree between yield and yield component factors were sequenced as follows:basic seedlings ＞ grain number per spike ＞ plant height ＞ growth period ＞ 1000 grains weight ＞ most tillering ＞ effective spike.In the course of bneding,the selection of grain number per spike,plant height,growth period should be paid attention to.But the selection of 1000 grains weight,most tillering,and effective spike should not be ignored.In the course of cultivation,the seeding rate should be appropriately added,timely irrigation and fertilization should be done to ensure enough basic seedlings and increase seed setting rate.
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维普
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