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Genome-Wide Association Reveals Trait Loci for Seed Glucosinolate Accumulation in Indian Mustard ( L.). | LitMetric

Genome-Wide Association Reveals Trait Loci for Seed Glucosinolate Accumulation in Indian Mustard ( L.).

Plants (Basel)

Faculty of Science and Engineering, Lismore Campus, Southern Cross University, East Lismore, NSW 2480, Australia.

Published: January 2022

AI Article Synopsis

  • Glucosinolates (GSLs) are important compounds in Indian mustard that affect seed quality and economic value, with different levels needed for various uses like condiments or oil.
  • A study was conducted on 158 Indian mustard lines to uncover the genetic factors influencing total GSL content and specific types of GSLs, sinigrin and gluconapin, using a large number of genetic markers.
  • The research identified significant genetic associations related to GSL biosynthesis, suggesting potential candidate genes for further study and aiding in molecular breeding efforts.

Article Abstract

Glucosinolates (GSLs) are sulphur- and nitrogen-containing secondary metabolites implicated in the fitness of Brassicaceae and appreciated for their pungency and health-conferring properties. In Indian mustard ( L.), GSL content and composition are seed-quality-determining traits affecting its economic value. Depending on the end use, i.e., condiment or oil, different GSL levels constitute breeding targets. The genetic control of GSL accumulation in Indian mustard, however, is poorly understood, and current knowledge of GSL biosynthesis and regulation is largely based on . A genome-wide association study was carried out to dissect the genetic architecture of total GSL content and the content of two major GSLs, sinigrin and gluconapin, in a diverse panel of 158 Indian mustard lines, which broadly grouped into a South Asia cluster and outside-South-Asia cluster. Using 14,125 single-nucleotide polymorphisms (SNPs) as genotyping input, seven distinct significant associations were discovered for total GSL content, eight associations for sinigrin content and 19 for gluconapin. Close homologues of known GSL structural and regulatory genes were identified as candidate genes in proximity to peak SNPs. Our results provide a comprehensive map of the genetic control of GLS biosynthesis in Indian mustard, including priority targets for further investigation and molecular marker development.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8838242PMC
http://dx.doi.org/10.3390/plants11030364DOI Listing

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