High-density linkage to physical mapping in a unique Tall × Dwarf coconut (Cocos nucifera L.) outbred F₂ uncovers a major QTL for flowering time colocalized with the FLOWERING LOCUS T (FT).

ABSTRACT:

Introduction

The coconut tree crop (Cocos nucifera L.) provides vital resources for millions of people worldwide. Coconut germplasm is largely classified into 'Tall' (Typica) and 'Dwarf' (Nana) types. While Tall coconuts are outcrossing, stress tolerant, and late flowering, Dwarf coconuts are inbred and flower early with a high rate of bunch emission. Precocity determines the earlier production of a plantation and facilitates management and harvest.

Methods

A unique outbred F₂ population was used, generated by intercrossing F₁ hybrids between Brazilian Green Dwarf from Jiqui (BGDJ) and West African Tall (WAT) cultivars. Single-nucleotide polymorphism (SNP) markers fixed for alternative alleles in the two varieties, segregating in an F₂

SUBMITTER: Grattapaglia D 

PROVIDER: S-EPMC11180721 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature