近十年新疆北疆主栽棉花种子低温萌发能力差异评价
Evaluation of Seed Germination of Main-cultivated Cotton under Low Temperature in Northern Xinjiang in Recent Ten Years
摘要
Abstract
[Objective] In order to understand the effect of low temperature on seed germination and to explore the suitable methods for identifying chilling tolerance of cotton seeds.[Method] Some mainly-cultivated cottons were selected as the experimental materials in northern Xinjiang in recent ten years,responses of seed germination characteristics to different temperature were studied,and their germination abilities were also evaluated using germination parameters and relative germination parameters (cold tolerance coefficient)according to subordinative function method under low temperature,respectively.[Result] With the increase of stress,the germination ability of cotton seeds was significantly inhibited,the average seed germination rate decreased with the increase of the temperature,and other indexes of germination were significantly higher with the increase of the temperature.The cold resistant germination ability of cotton seeds was positively correlated with the tested germination index.At the same low temperature,two kinds of subordinate function method showed a good agreement on the seed germination ability at low temperature,but the germination rate of cotton seed under different low temperature was different.The seed germination of Zhongrniansuo No.36 and Xinluzao No.46 h ad a high chilling-tolerance at 15℃,and at 25℃,those with high chilling tolerance were Xinluzao No.25,Xinluzao No.42,Xinluzao No.36,Xinluzhong No.26,Zhongmiansuo No.36,Xinluzao No.41 and Xinluzao No.35.Except for the average germination speed,the relationship among others germination parameters and seed germination ability was significandy correlated.The identification model for cold resistant cotton seed germination under low temperature was established by stepwise regression method:Y =0.01 + 0.022* GI (germination index) (R2 =0.998) at 15℃;Y=-0.046 +0.002* GR (germination rate) + 0.005* SGC (Seed germination coefficient) (R2 =0.992) at 12℃.[Conclusion] The seed of Zhongmiansuo NO.36 and Xinluzao NO.46 had a high chilling tolerance at the seed germination stage.The germination index of fuzzy membership function method can be effectively used for the identification and evaluation of cold tolerance based on cotton seed germination.关键词
棉花/种子萌发/低温/耐冷性/模糊隶属函数Key words
cotton/seed germination/low temperature/chilling tolerance/fuzzy subordinate function分类
农业科技引用本文复制引用
徐建伟,张晨,曾晓燕,张小均,李志博,魏亦农..近十年新疆北疆主栽棉花种子低温萌发能力差异评价[J].新疆农业科学,2017,54(9):1569-1578,10.基金项目
国家自然科学基金项目“荒漠绿洲区不同生育期棉花耐冷性差异的生理机制及蛋白质组学研究”(31560074) （31560074）
国家自然科学基金项目“棉花抗旱相关性状的遗传及QTL定位研究”(31360265) （31360265）
石河子大学新品种培育专项“中熟高产优质多抗机采棉新品种(系)的选育”(YZZX201602) （系）
National Natural Science Foundation of China "Studies on the Physiological Mechanism and Proteomics of Differential Chilling Tolerance in Cotton (Gossypiym hirsutum L.) at Different Growth Stages in Desert Oasis Region" (31560074) and " Inheritance and QTL Mapping of Traits Associated with Drought Resistance in Cotton (Gossypium hirsutum L.)" (31360265) （Gossypiym hirsutum L.）
The Special Project for the Cultivation of New Varieties in Shihezi University " New Variety (lines) Breeding of Machine-harvested Cotton with Mid-maturation,High Yield,Quality and Multiple Resistance" (YZZX201602) （lines）
