Natural variation in a CENTRORADIALIS homolog contributed to cluster fruiting and early maturity in cotton

BMC Plant Biology

卷:18

Jianyan Zeng¹  Yuehua Xiao¹  Kai Guo²  Zhengsheng Zhang²  Dajun Liu²  Dexin Liu²  Zhonghua Teng²  Jinxia Wang²  Xueying Liu²  Xianping Deng²  Tengfei Zhai²  Xiao Zhang²  Jian Zhang²  Wenwen Wang²  Jie Kong³  Weiran Wang³ 

[1] Biotechnology Research Center, Southwest University;

[2] College of Agronomy and Biotechnology, Southwest University;

[3] Institute of Economic Crops, Xinjiang Academy of Agricultural Sciences;

关键词: Cotton;    Map-based cloning;    Cluster fruiting;    Determinate growth habit;    CEN/TFL1;    Plant architecture;   

DOI  :  10.1186/s12870-018-1518-8

来源: DOAJ

【 摘 要 】

Abstract Background Plant architecture and the vegetative-reproductive transition have major impacts on the agronomic success of crop plants, but genetic mechanisms underlying these traits in cotton (Gossypium spp.) have not been identified. Results We identify four natural mutations in GoCEN-D t associated with cluster fruiting (cl) and early maturity. The situ hybridization shows that GhCEN is preferentially expressed in cotton shoot apical meristems (SAM) of the main stem and axillary buds. Constitutive GhCEN-Dt overexpression suppresses the transition of the cotton vegetative apex to a reproductive shoot. Silencing GoCEN leads to early flowering and determinate growth, and in tetraploids causes the main stem to terminate in a floral bud, a novel phenotype that exemplifies co-adaptation of polyploid subgenomes and suggests new research and/or crop improvement approaches. Natural cl variations are enriched in cottons adapted to high latitudes with short frost-free periods, indicating that mutants of GoCEN have been strongly selected for early maturity. Conclusion We show that the cotton gene GoCEN-Dt, a homolog of Antirrhinum CENTRORADIALIS, is responsible for determinate growth habit and cluster fruiting. Insight into the genetic control of branch and flower differentiation offers new approaches to develop early maturing cultivars of cotton and other crops with plant architecture appropriate for mechanical harvesting.

【 授权许可】

Unknown