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Male Sterile Line

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1. Rice A line cannot produce viable pollen due to sterile cytoplasm, described as being cytoplasmic male sterile (CMS).

2. It is used as a female parent for hybrid rice seed production.

3. The male sterile line is commonly called a CMS line or the seed parent or the female parent or the A line.

4. Panicles may not exsert fully. Their basal portion remains inside the flag leaf sheath.

5. Anthers are pale or white and shrivelled. The flowering period usually lasts for 7 days.

File Courtesy: 
Agro Techniques for Hybrid Rice Cultivation and Seed Production - 2005, DRR Training Manual
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