Stability of male fertility is more important than the lower levels of stable male fertility. What are the major factors affecting fertility restoration ability of male parent. Is there any report available on this topic if yes please send me soft or hard copy. Any effect of high temperature or very low temperature on fertility in sunflower. Is there any genetic factors also for affecting restoration ability of restore lines. If yes, what are those genetic factors and how they affecting it. If anybody working on this aspects please reply with proof or data or publication.
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