Identification of Genetic Factors Controlling the Formation of Multiple Flowers Per Node in Pepper ( Capsicum spp.)

Flower production provides the foundation for crop yield and increased profits. is a pepper species with a sympodial shoot structure with solitary flowers. By contrast, produces multiple flowers per node. accounts for 80% of pepper production worldwide. The identification of genes that control multi...

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Published inFrontiers in plant science Vol. 13; p. 884338
Main Authors Kim, Youngin, Kim, Geon Woo, Han, Koeun, Lee, Hea-Young, Jo, Jinkwan, Kwon, Jin-Kyung, Lemmon, Zachary, Lippman, Zachary, Kang, Byoung-Cheorl
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 09.05.2022
Subjects
flower production
genome-wide association study
genotyping-by-sequencing
pepper
Plant Science
quantitative trait locus
yield
genotyping-by-sequencing
pepper
quantitative trait locus
flower production
genome-wide association study
yield
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Summary:Flower production provides the foundation for crop yield and increased profits. is a pepper species with a sympodial shoot structure with solitary flowers. By contrast, produces multiple flowers per node. accounts for 80% of pepper production worldwide. The identification of genes that control multiple flowers and their transfer into may open the way to increasing fruit yield. In this study, we dissected the genetic factors were dissected controlling the multiple-flower-per-node trait in . 85 recombinant inbred lines (RILs) between the contrasting 'TF68' and 'Habanero' accessions were phenotyped and genotyped. Quantitative Trait Loci (QTL) analysis identified four novel QTLs on chromosomes 1, 2, 7, and 11 that accounted for 65% of the total phenotypic variation. Genome-wide association study was also performed on a panel of 276 genotyped and phenotyped accessions, which revealed 28 regions significantly associated with the multiple-flower trait, of which three overlapped the identified QTLs. Five candidate genes involved in the development of the shoot and flower meristems were identified and these genes could cause multiple flowers per node in pepper. These results contribute to our understanding of multiple flower formation in and will be useful to develop high-yielding cultivars.
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Edited by: Rebecca Grumet, Michigan State University, United States
These authors have contributed equally to this work
This article was submitted to Plant Breeding, a section of the journal Frontiers in Plant Science
Reviewed by: Zhiming Wu, Zhongkai University of Agriculture and Engineering, China; Solomon Abate Mekonnen, Ethiopian Institute of Agricultural Research, Ethiopia
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2022.884338