耐盐水稻产量与主要农艺性状的灰色关联度分析

Grey Correlation Analysis of the Relationship Between the Yield and Main Agronomic Characters of Salt-tolerant Rice Varieties

耐盐水稻的主要农艺性状对产量的影响客观存在。为了给现时期耐盐水稻新品种的选育提供理论依据,对参加江苏省耐盐水稻品种区域试验14个水稻品种的11个性状及产量进行灰色关联度分析。结果显示:耐盐水稻的农艺性状与产量的关联度从大到小排序为实粒数、结实率、总粒数、千粒质量、株高、基本苗、有效穗数、穗长、全生育期、高峰苗数;粒数性状是影响耐盐碱水稻产量的主要因素;高峰苗数对产量的影响较小。在江苏盐城地区耐盐水稻育种中,应对实粒数、千粒质量等几个性状加强选育力度。

The main agronomic characters of salt-tolerant rice varieties have a significant effect on their yields.In order to provide a theoretical basis for selecting and breeding new salt-tolerant rice varieties,the gray correlation analysis was performed to assess the relationship between 11 traits and yields of 14 rice varieties which had been assessed in regional trials of salt-tolerant rice varieties in Jiangsu Province.The results showed that different agronomic traits correlated with yield in varying degrees as follows:filled grain number>seed setting rate>total grain number>thousand-grain-weight>plant height>basic seedling number>effective panicle>panicle length>full growth period>peak seedling number.Therefore,the traits associated with grain number are main determinant factors for the yield of the salt-tolerant rice varieties,while peak seedling number only has a minor effect on yield.In conclusion,in breeding salt-tolerant rice varieties in Yancheng City,Jiangsu Province,selection of the traits associated with grain number,such as filled grain number and thousand-grain-weight,should be strengthened.