Genome-Wide Association Study for Flowering Time in Korean Cowpea Germplasm

Cowpea is an annual legume crop; although it is an essential food in developing countries, cowpea is now grownworldwide. For the genetic improvement of plants, flowering time is one of the major selection criteria. In general, flowering isregulated by photoperiod and temperature, along with the inte...

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Published inPlant breeding and biotechnology Vol. 8; no. 4; pp. 413 - 425
Main Authors Seo, Eunju, Kim, Kipoong, Kang, Ryulyi, Kim, Gyutae, Park, Aron, Kim, Woon Ji, Sun, Hokeun, Ha, Bo-Keun
Format Journal Article
LanguageEnglish
Published 한국육종학회 01.12.2020
Subjects
농학
Online AccessGet full text
ISSN2287-9358
2287-9366
DOI10.9787/PBB.2020.8.4.413

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Abstract Cowpea is an annual legume crop; although it is an essential food in developing countries, cowpea is now grownworldwide. For the genetic improvement of plants, flowering time is one of the major selection criteria. In general, flowering isregulated by photoperiod and temperature, along with the interaction between environmental factors. In this study, we aimed toinvestigate the candidate genes associated with flowering time using genome-wide association study (GWAS). To investigate theflowering time-related genes, 384 cowpea germplasms were genotyped with 51,128 single nucleotide polymorphisms (SNPs). Themain genetic component of days to flowering (DTF) was analyzed using genome association and prediction integrated tool (GAPIT)and elastic-net analyses. From the GAPIT and elastic-net analyses, a total of 23 SNPs were significantly associated with DTF amongfive (chr. 2, 3, 7, 9, and 11) and seven different chromosomes (chr. 1, 2, 3, 4, 5, 8, and 9), respectively. Based on our analysis,Vigun01g084000, Vigun01g227200, Vigun02g062600, and Vigun03g296800 were considered the major candidate genes that weresignificantly associated with DTF in cowpea. These results confirmed that DTF might be controlled by multiple genes affecting earlyflowering, delaying flowering time, repressing the transition to flowering, etc. This study will potentially contribute to effective DTFgenomic selection in plant breeding to better understand the genetic basis and explore the mechanism of flowering time. KCI Citation Count: 0
AbstractList Cowpea is an annual legume crop; although it is an essential food in developing countries, cowpea is now grownworldwide. For the genetic improvement of plants, flowering time is one of the major selection criteria. In general, flowering isregulated by photoperiod and temperature, along with the interaction between environmental factors. In this study, we aimed toinvestigate the candidate genes associated with flowering time using genome-wide association study (GWAS). To investigate theflowering time-related genes, 384 cowpea germplasms were genotyped with 51,128 single nucleotide polymorphisms (SNPs). Themain genetic component of days to flowering (DTF) was analyzed using genome association and prediction integrated tool (GAPIT)and elastic-net analyses. From the GAPIT and elastic-net analyses, a total of 23 SNPs were significantly associated with DTF amongfive (chr. 2, 3, 7, 9, and 11) and seven different chromosomes (chr. 1, 2, 3, 4, 5, 8, and 9), respectively. Based on our analysis,Vigun01g084000, Vigun01g227200, Vigun02g062600, and Vigun03g296800 were considered the major candidate genes that weresignificantly associated with DTF in cowpea. These results confirmed that DTF might be controlled by multiple genes affecting earlyflowering, delaying flowering time, repressing the transition to flowering, etc. This study will potentially contribute to effective DTFgenomic selection in plant breeding to better understand the genetic basis and explore the mechanism of flowering time. KCI Citation Count: 0
Author Kang, Ryulyi
Park, Aron
Ha, Bo-Keun
Kim, Woon Ji
Seo, Eunju
Kim, Kipoong
Kim, Gyutae
Sun, Hokeun
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  surname: Seo
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  organization: Department of Applied Plant Science, Chonnam National University, Gwangju 61186, Korea
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Title Genome-Wide Association Study for Flowering Time in Korean Cowpea Germplasm
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