Alternative splicing of flowering time gene FT is associated with halving of time to flowering in coconut
文献类型： 外文期刊
作者： Xia, Wei 2 ; Liu, Rui 1 ; Zhang, Jun 1 ; Mason, Annaliese S. 3 ; Li, Zhiying 1 ; Gong, Shufang 1 ; Zhong, Yazhu 1 ; Dou, 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Coconut Res Inst, Natl Engn Res Ctr Coconut, Wenchang, Peoples R China
2.Hainan Univ, Coll Trop Crops, Haikou, Hainan, Peoples R China
3.Justus Liebig Univ Giessen, Dept Plant Breeding, IFZ Res Ctr Biosyst Land Use & Nutr, Heinrich Buff Ring 26-32, D-35392 Giessen, Germany
4.Hainan Key Lab Biosafety Monitoring & Mol Breedin, Haikou, Hainan, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2020 年 10 卷 1 期
页码：
收录情况： SCI
摘要： Coconut palm has two distinct types-"tall" and "dwarf"-which differ morphologically. Tall coconut varieties need 8-10 years to start flowering, while dwarf coconut varieties only require 3-5 years. We compared seedling and reproductive stage transcriptomes for both coconut types to determine potential molecular mechanisms underlying control of flowering time in coconut. Several key genes in the photoperiod pathway were differentially expressed between seedling and reproductive leaf samples in both tall and dwarf coconut. These genes included suppressor of overexpression of constans (SOC1), flowering locus T (FT), and Apetala 1 (AP1). Alternative splicing analysis of genes in the photoperiod pathway further revealed that the FT gene produces different transcripts in tall compared to dwarf coconut. The shorter alternative splice variant of FT [which included a 6 bp deletion, alternative 3 ' splicing sites (A3SS)] was found to be exclusively present in dwarf coconut varieties but absent in most tall coconut varieties. Our results provide a valuable information resource as well as suggesting a probable mechanism for differentiation of flowering time onset in coconut, providing a target for future breeding work in accelerating time to flowering in this crop species.
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