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当前位置: 首页 > 文章 > 温敏核雄性不育小麦BNS的育性转换规律初探 河南农业科学 2010,39 (7) 7-11
Position: Home > Articles > A Preliminary Study on Fertility Alteration of Thermo-sensitive Genic Male Sterile Wheat Line BNS Journal of Henan Agricultural Sciences 2010,39 (7) 7-11

温敏核雄性不育小麦BNS的育性转换规律初探

作  者：
张自阳;胡铁柱;冯素伟;李笑慧;李淦;茹振钢
单  位：
河南科技学院小麦中心
关键词：
小麦;雄性不育;育性转换;BNS
摘  要：
为探讨低温雄性不育小麦BNS的育性转换规律,2007-2009年通过分期播种试验,对BNS育性转换特性进行了初步研究。结果表明,BNS具有不育彻底、育性转换彻底的特性,育性变化趋势为:完全败育-半不育-完全可育。低温是影响BNS育性转换的主要原因,表现低温不育,高温可育。BNS感受低温的敏感部位为发育的幼穗;BNS育性转换敏感期在抽穗前5~18 d,即雌雄蕊分化期至四分体形成期;在温度敏感期内,温度低于8℃时表现彻底不育,8~12℃是育性转换温度,温度高于12℃时表现完全可育。在豫北地区,9月23日-10月17日播种,表现彻底不育,可用于生产杂交种;11月18日以后播种均表现完全可育,可以自交繁殖不育系种子。
译  名：
A Preliminary Study on Fertility Alteration of Thermo-sensitive Genic Male Sterile Wheat Line BNS
作  者：
ZHANG Zi-yang,HU Tie-zhu,FENG Su-wei,LI Xiao-hui,LI Gan,RU Zhen-gang(Center of Wheat,Henan Institute of Science and Technology,Xinxiang 453003,China)
关键词：
Wheat;Male sterile;Fertility transition;BNS
摘  要：
The fertility alteration of male-sterile wheat line BNS was studied by means of sowing date tests from 2007 to 2009.The results indicated that BNS was completely sterile and complete transition of fertility.The fertility of BNS alternated evidently during the tests.With the delay of sowing date,the fertility of BNS changed from complete male sterility to semi-sterility,and then to complete normal fertility.Low temperature was the main factor affecting fertility transition of BNS.It showed male-sterile at low temperature and fertility in high temperature.The young panicle was the thermo-sensitive part of fertility expression.The sensitive stage of BNS was in 5-18d before heading.The sensitive phase of the male fertility transformation was from stamen and pistil differentiation to anther chamber formation.BNS showed complete male sterility below 8℃,and its fertility transition temperature was 8-12℃,while it showed complete normal fertility above 12℃.When BNS was sowed between September 23 and October 17 in northern part of Henan,it was complete male sterile and could be used to produce hybrid.Whereas,if sowed after November 18,it was complete normal fertility and could be used to produce seeds of male sterile line.

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