周8425B衍生小麦品种抗旱特性及其遗传增益解析  

Analysis of Drought-Tolerance Characteristics and Genetic Gain for Wheat Varieties Derived from Zhou 8425B

作　　者：于海飞 王丽娜 殷贵鸿 韩玉林 邹少奎 李楠楠 张倩 吕永军 李顺成 杜晓宇 Yu Haifei;Wang Lina;Yin Guihong;Han Yulin;Zou Shaokui;Li Nannan;Zhang Qian;LüYongjun;Li Shuncheng;Du Xiaoyu(Zhoukou Academy of Agricultural Sciences,Zhoukou 466000,China)

机构地区：[1]周口市农业科学院,河南周口466000

出　　处：《山东农业科学》2022年第1期21-29,共9页Shandong Agricultural Sciences

基　　金：国家重点研发计划专项(2017YFD0100700);河南省重大科技专项(181100110200,201300110800);财政部和农业农村部:国家现代农业产业技术体系项目(CARS-03-02-23);河南省现代小麦产业技术体系项目(Z2010-01-11)。

摘　　要：利用现代品种衍生群体探究干旱条件下遗传增益,对于小麦抗旱育种具有重要意义。本研究以黄淮冬麦区南片骨干亲本周8425B及其衍生品种为试验材料,通过两年两点的两种灌溉水平处理,对抗旱相关性状进行分析。结果表明,其抗旱相关性状均受基因型、环境、水分处理及其互作效应的显著影响。干旱条件下,周8425B衍生品种的产量和抗旱指数年遗传增益为-0.22%和-0.56%,花后7d旗叶可溶性糖和脯氨酸含量年均降低0.58%和1.63%,均达显著水平,抗旱能力减弱的主要表现为花后7d旗叶可溶性糖和脯氨酸含量显著降低。产量和抗旱指数密切相关,单位面积穗数可作为品种抗旱性强弱的重要指标。本研究对于小麦抗旱育种具有显著应用价值。Using modern variety derived populations to explore genetic gain under drought conditions is of great significance to wheat drought-resistant breeding.In this study,Zhou 8425 B,the backbone parent in the south of Huanghe-Huaihe winter wheat area,and its derivid varieties were used as experimental materials to analyze the drought resistance related characters under two irrigation levels in two years in two places.The results showed that the drought resistance related characters were significantly affected by genotype,environment,water treatments and their interactions.Under drought conditions,the annual genetic gain of yield and drought resistance index of Zhou 8425 B derived varieties were-0.22%and-0.56%,and the contents of soluble sugar and proline in flag leaves after 7 days of anthesis decreased by 0.58%and 1.63%.They all reached significant level,which indicated that the weakening of drought resistance was mainly reflected in the significant decrease of soluble sugar and proline contents in flag leaves after 7 days of anthesis.The yield was closely related to drought resistance index,and the number of panicles per unit area could be used as an important index to evaluate drought resistance.This study had significant application value for drought-resistant breeding of wheat.

关 键 词：普通小麦 抗旱性 遗传增益 周8425B 衍生品种 

分 类 号：S512.110.34[农业科学—作物学]