Research Progress of Molecular Regulation of Branching of Crops

doi:10.13560/j.cnki.biotech.bull.1985.2020-0906

Abstract

Abstract:

The number of branching and the angle of branching are the main agronomic traits determining the types of crops. The number of effective branches determines the number of spikes or pods of crops,and then determines the yield. Branch angle is closely related to photosynthetic efficiency,plant density and disease resistance,which not only affects crop yield,but also affects crop quality. Because branching plays a very important role in crop production,and has attracted more and more researchers’ attention. Several key genes related to branching have been identified and great progress has been achieved in the molecular mechanism study of branch number regulation. Accumulated studies indicate that branch habit is subject to strict genetic regulation as well as environmental conditions. This paper summarized the research progress in the cloning,expression analysis,function identification and molecular regulatory mechanisms of genes related to branching,and discussed its application in crop variety improvement.

Key words: auxin, branch angle, branch number, gravitropism, strigolactone

ZHOU Xi-meng, FU Chun, MA Chang-le, WANG Xing-jun, ZHAO Chuan-zhi. Research Progress of Molecular Regulation of Branching of Crops[J]. Biotechnology Bulletin, 2021, 37(3): 107-114.

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