我国主要水稻雄性不育系的光温特性研究

Study on Photoperiod and Temperature Characteristics of Main Genic Male Sterile(GMS) Rice Lines in China

摘要:

根据10个水稻雄性不育系的生育期及期间的温度和日长资料,研究了它们的光、温生态特性。用通径分析方法,分析了决定各不育系生育期变化的决策变量。结果表明:晚籼及晚粳类型不育系的感光性强,中籼类型不育系的感光性弱到中等,早籼类型不育系的感光性一般都弱。10个雄性不育系中感温性弱的只占少数,感温性属弱到中强的品种占多数。除HS3和SE21S的生育期决策变量为日长外,其他各不育系的决策变量均为温度。

关键词:水稻雄性不育系;光温特性;感光性;感温性;通径分析

Abstract:

The ecological characters of photoperiod and temperature for 10 genic male-sterile (GMS) rice lines have been studied in this paper using the observation data from the joint ecological assessment experiment for new GMS rice lines in the Hi-tech Research and Development Program of China,and the decision variable for the growth period of each GMS line has been determined by the path analysis method.The analyses show that the photoperiodic sensitivity is strong for the late indica and japonica hybrid GMS rice lines,weak to medium for the semilate indica GMS rice line,and generally weak for the early indica GMS rice line.The temperature sensitivity is weak for only a few of 10 GMS rice line,and weak to medium strong for the majority.The decision variable for the growth period of the majoritity of 10 GMS rice line is temperature,except that for HS-3 and SE21S is photoperiod.

Key words:genic male-sterile rice line;response to photoperiod and temperature;photoperiod sensitivity;temperature sensitivity;path analysis