Research progress on rice rolled leaf and its application in breeding program | 水稻卷叶性状的研究进展及在育种中的应用
2009
Shen Nianwei, China National Rice Research Institute, Hangzhou(China) | Qian Qian, China National Rice Research Institute, Hangzhou(China) | Zhang Guangheng, China National Rice Research Institute, Hangzhou(China)
chinois. 目前,水稻叶片卷曲性状已被直接或间接的应用于水稻理想株型育种。研究发现,叶片适度的内卷能使叶片挺直以减少披垂现象的发生,在生长发育后期作用明显,有利于改善水稻基部的受光条件,进而提高植株光能的利用率,实现增产的目的;叶片过度卷曲会产生许多不利的影响,如有效叶面积指数偏小以及光合有效辐射利用率不高等。大量证据表明,叶片卷曲受到体内遗传机制和体外环境因子的双重调节。本文主要综述水稻叶片卷曲的相关研究,包括卷曲效应、形成机制、相关调控基因及其在育种中的利用等,同时探讨了目前水稻卷叶研究中存在的问题,以期能更好地促进卷叶性状在水稻育种中的应用。[著者文摘]
Afficher plus [+] Moins [-]anglais. At present, the trait of rice rolled leaf has been utilized directly or indirectly in rice ideotype plato architecture breeding. It was found that moderate leaf rolling is an important agronomic trait, making leaves upright and reduce drooping, especially in the latter stage of the growth. Moderate leaf rolling can also in favour of improving condition of sunlight reception in basilar of rice which increases photosynthesis of cultivars and hence raises grain yield. However, there are many disadvantageous effects of excessive leaf curling, such as smaller effective leaf area index, lower utilization rate of photosynthetic active radiation. Abundant evidence indicate that leaf curling is dual effected by genetic and environmental factors. In this paper, we summarized the results about rice rolled leaf, including curling effect, formation mechanism, gene regulation and application in rice breeding, and also discusses existing problems in current study of rice rolled leaf, aiming to promote the applications of rolled leaf traits in rice breeding program.
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