Genetic dissection of yield associated traits in a cross between cowpea and yard-long bean (Vigna unguiculata (L.) Walp.) based on DArT markers.

Publication Overview
TitleGenetic dissection of yield associated traits in a cross between cowpea and yard-long bean (Vigna unguiculata (L.) Walp.) based on DArT markers.
AuthorsGarcia-Oliveira AL, Zana Zate Z, Olasanmi B, Boukar O, Gedil M, Fatokun C
TypeJournal Article
Journal NameJournal of genetics
Volume99
Year2020
CitationGarcia-Oliveira AL, Zana Zate Z, Olasanmi B, Boukar O, Gedil M, Fatokun C. Genetic dissection of yield associated traits in a cross between cowpea and yard-long bean (Vigna unguiculata (L.) Walp.) based on DArT markers.. Journal of genetics. 2020; 99.

Abstract

Both cowpea and yard-long bean belong to Vigna unguiculata ssp. unguiculata but have diverged through human induced evolution in sub-Saharan Africa and Asia, respectively. To map the quantitative trait loci (QTLs) for yield associated traits and derive new lines that may combine the attributes of both types, we developed a F2:3 mapping population derived from a cross between cowpea line TVu2185 and yard-long bean line TVu6642. Using DArT markers, a total of 30 QTLs accounting for 1.8-13.0% phenotypic variation was detected for pod and seed traits. Some novel major QTLs for peduncle number per plant (qPeN2.2), pod length (qPoL3), seed breadth (qSB4), length (qSL7.2) and thickness (qST9) identified on chromosomes 2, 3, 4, 7 and 9, respectively, are particularly interesting and need to be validated. Moreover, we confirmed previously reported QTLs for pod length (qPoL8) and 100-seed weight (qSW8) on chromosome 8 and for seed number per pod (qSN9.2) on chromosome 9 suggesting usefulness for marker-assisted-selection purpose. Notably, some QTLs for these traits were clustered especially on chromosomes 5, 7, 8, 9 and 10 indicating the presence of the same QTL or linked loci in these regions. Moreover, the involvement of epistasis was observed for trait expressions, but compared with the main effect QTLs, the phenotypic effects of epistatic-QTLs detected were much less. The present QTL analysis may provide a useful tool for breeders to formulate efficientbreeding strategy for introgression of the desirable alleles for yield related traits in cowpea using molecular markers.

Features
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Pages

Projects
This publication contains information about 1 projects:
Project NameDescription
Cowpea-Yield-Garciaoliviera-2020
Featuremaps
This publication contains information about 1 maps:
Map Name
Cowpea-Tvu2185/Tvu6642-F2:3
Stocks
This publication contains information about 3 stocks:
Stock NameUniquenameType
Tvu-2185Tvu-2185accession
Tvu-6642Tvu-6642accession
Tvu2185/Tvu6642-F2:3Tvu2185/Tvu6642-F2:3population
Properties
Additional details for this publication include:
Property NameValue
LanguageEnglish
Language Abbreng
Publication TypeJournal Article
Journal CountryIndia
Publication ModelPrint
ISSN0973-7731
eISSN0973-7731
Publication Date2020
Journal AbbreviationJ. Genet.
PII57
Elocation57