Articles
A genome-wide association study reveals a genomic region associated with the carrot root shape
Article number
1264_15
Pages
129 – 134
Language
English
Abstract
Carrot is a vegetable widely used for fresh market and processing.
Diverse groups of carrot cultivars have been developed to meet consumer demands and industry needs.
The major varietal groups of cultivated carrot are defined based on the root color and shape.
However, little is known about the genetic basis of root shape determination.
We used 307 plants representing 103 carrot open-pollinated cultivars, to identify genomic regions associated with traits describing carrot root shape.
Plants were phenotyped and genotyped using GBS (genotyping by sequencing). After filtering and imputation, 81,748 SNPs were used to perform association mapping.
We observed large diversity of phenotypic traits among and within varietal groups.
Based on the MLM model, a QTL located on chromosome 1 significantly associated with the shoulder diameter was identified.
The identified QTL was located within an almost 600 kb long genomic region, characterized by elevated LD suggesting that the region was under selection upon domestication.
Diverse groups of carrot cultivars have been developed to meet consumer demands and industry needs.
The major varietal groups of cultivated carrot are defined based on the root color and shape.
However, little is known about the genetic basis of root shape determination.
We used 307 plants representing 103 carrot open-pollinated cultivars, to identify genomic regions associated with traits describing carrot root shape.
Plants were phenotyped and genotyped using GBS (genotyping by sequencing). After filtering and imputation, 81,748 SNPs were used to perform association mapping.
We observed large diversity of phenotypic traits among and within varietal groups.
Based on the MLM model, a QTL located on chromosome 1 significantly associated with the shoulder diameter was identified.
The identified QTL was located within an almost 600 kb long genomic region, characterized by elevated LD suggesting that the region was under selection upon domestication.
Authors
A. Macko-Podgórni, K. Stelmach, K. Kwolek, D. Senalik, P.W. Simon, D. Grzebelus
Keywords
root shape, association mapping, GBS
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