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-Dt 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.
journal_name
BMC Plant Bioljournal_title
BMC plant biologyauthors
Liu D,Teng Z,Kong J,Liu X,Wang W,Zhang X,Zhai T,Deng X,Wang J,Zeng J,Xiao Y,Guo K,Zhang J,Liu D,Wang W,Zhang Zdoi
10.1186/s12870-018-1518-8subject
Has Abstractpub_date
2018-11-20 00:00:00pages
286issue
1issn
1471-2229pii
10.1186/s12870-018-1518-8journal_volume
18pub_type
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