The meaning of ISE was defined; the complexity of fertility expression of PTGMS lines, the drift of critical sterility inducing tempera tu.
光温敏不育系不育性表达不稳定是近年来两系杂交水稻研究和应用中遇到的一大难题。
So it is very important for the theory and practice to research and insight the fertility alteration, fertility inheritance and physiological and biochemical characters of PTGMS lines.
因此，选育不育临界温度低、育性相对稳定的实用光温敏核不育系，探讨不育系育性转换规律、育性遗传规律及生理生化特性，在理论和实践上都具有重要意义。
Hybrid F1 from Indica crossed with Japoniac as well as Photoperiod and Temperature Sensitive Genic Male-Serile(PTGMS) rice lines were the hot materials used in anther culture in recent years.
近年来对籼粳交F1和光温敏核不育系的花药培养成为研究热点，其花培后代因所用材料不同而不同。
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