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Genome-wide association study for phosphate deficiency responsive root hair elongation in chickpea

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Title Genome-wide association study for phosphate deficiency responsive root hair elongation in chickpea
 
Creator Kohli, Pawandeep Singh
Verma, Pankaj Kumar
Verma, Rita
Parida, Swarup K.
Thakur, Jitendra K.
Giri, Jitender
 
Subject Root system architecture
Phosphate deficiency
Root hair
Legume
P-uptake
GWAS
 
Description Accepted date: 16 August 2020
Root hairs (RHs) are single-celled elongated epidermal cells and play a vital role in nutrient absorption, particularly for immobile
minerals like phosphorus (P). As an adaptive response to P deficiency, an increase in RH length enhances root-soil contact and
absorptive area for P absorption. Genetic variations have been reported for RH length and its response to P deficiency in plants.
However, only a few association studies have been conducted to identify genes and genetic loci associated with RH length. Here,
we screened desi chickpea accessions for RH length and its plasticity under P deficiency. Further, the genome-wide association
study (GWAS) was conducted to identify the genetic loci associated with RH length in P deficient and sufficient conditions.
Although high variability was observed in terms of RH length in diverse genotypes, majority of the accessions showed typical
response of increase in RH length in low P. Genome-wide association mapping identified many SNPs with significant associations with RH length in P-sufficient and P-deficient conditions. A few candidate genes for RH length in P deficient (SIZ1-like
and HAD superfamily protein) and sufficient (RSL2-like and SMAP1-like) conditions
were identified which have known roles in RH development and P deficiency response or both. Highly associated loci and
candidate genes identified in this study would be useful for genomic-assisted breeding to develop P-efficient chickpea.
s JG acknowledges the support from DBTIYBA grant. PSK acknowledges DBT-Junior Research
Fellowship (JRF). This work was supported by the DBT-Innovative Young
Biotechnologist Award (IYBA) [BT/010/IYBA/2016/04]. PSK acknowledges DBT-Junior Research Fellowship (JRF).
 
Date 2020-09-09T10:15:46Z
2020-09-09T10:15:46Z
2020
 
Type Article
 
Identifier Functional & Integrative Genomics, 20: 775–786
1438-7948
https://doi.org/10.1007/s10142-020-00749-6
https://link.springer.com/article/10.1007/s10142-020-00749-6
http://223.31.159.10:8080/jspui/handle/123456789/1094
 
Language en_US
 
Format application/pdf
 
Publisher Springer Nature Publishing AG