Alternative splicing of flowering time gene FT is associated with halving of time to flowering in coconut.

Scientific Reports
Wei XiaYong Xiao

Abstract

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 t...Continue Reading

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Datasets Mentioned

BETA
PRJEB34852

Methods Mentioned

BETA
PCR
electrophoresis
RNA-seq

Key Resources (RRID) Mentioned

SCR

Software Mentioned

GATK4
Blast2GO
STAR
PossionDis
Blastall
rMATS
WEGO
BLASTX
Snapgene Viewer
BLAST

Related Concepts

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