Single and multi‐trait genome‐wide association studies identify genomic regions associated with phenological traits in cowpea

Author:

Andrade Mario Henrique Murad Leite1,Ferreira Rebecca Caroline Ulbricht2,Filho Claudio Carlos Fernandes3ORCID,Sipowicz Pablo4,Rios Esteban Fernando3ORCID

Affiliation:

1. School of Food and Agriculture University of Maine Orono Maine USA

2. Molecular Biology and Genetic Engineering Center (CBMEG) University of Campinas (UNICAMP) Campinas Sao Paulo Brazil

3. Agronomy Department University of Florida Gainesville Florida USA

4. Plant Breeding Graduate Program University of Florida Gainesville Florida USA

Abstract

AbstractUnderstanding the genetic control of traits linked to phenology is essential to address strategies and efforts in the development of resilient cultivars capable of adapting to climate change. In this study, we performed genome‐wide association studies on a cowpea [Vigna unguiculata (L.) Walp] mini‐core collection to dissect the genetic architecture and identify genomic regions associated with days to flowering, days from flowering to pod maturity, and days to pod maturity. Phenotypic data were collected in 2 years and used to test associations with 41,533 single‐nucleotide polymorphism markers by single and multi‐trait analysis. In addition, we searched for candidate genes putatively involved in phenological traits within genome‐associated regions. The single‐trait approach identified 28 significant marker‐trait associations for the three traits, while the multi‐trait identified 18 significant associations, both evidencing pleiotropic associations. Five of these markers were associated with phenological traits reported in previous studies. Candidate genes were identified, including genes involved in phosphorylation and encoding the maternal effect embryo arrest 60, known to be associated with pod maturity and flowering, respectively. Functional validation of these genes will further improve our understanding of the variation of phenological traits in cowpea and other related crops.

Funder

National Institute of Food and Agriculture

Fundação de Amparo à Pesquisa do Estado de São Paulo

Publisher

Wiley

Subject

Agronomy and Crop Science

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