Identification of candidate genes and natural allelic variants for QTLs governing plant height in chickpea

Sci Rep. 2016 Jun 20:6:27968. doi: 10.1038/srep27968.

Abstract

In the present study, molecular mapping of high-resolution plant height QTLs was performed by integrating 3625 desi genome-derived GBS (genotyping-by-sequencing)-SNPs on an ultra-high resolution intra-specific chickpea genetic linkage map (dwarf/semi-dwarf desi cv. ICC12299 x tall kabuli cv. ICC8261). The identified six major genomic regions harboring six robust QTLs (11.5-21.3 PVE), associated with plant height, were mapped within <0.5 cM average marker intervals on six chromosomes. Five SNPs-containing genes tightly linked to the five plant height QTLs, were validated based upon their high potential for target trait association (12.9-20.8 PVE) in 65 desi and kabuli chickpea accessions. The vegetative tissue-specific expression, including higher differential up-regulation (>5-fold) of five genes especially in shoot, young leaf, shoot apical meristem of tall mapping parental accession (ICC8261) as compared to that of dwarf/semi-dwarf parent (ICC12299) was apparent. Overall, combining high-resolution QTL mapping with genetic association analysis and differential expression profiling, delineated natural allelic variants in five candidate genes (encoding cytochrome-c-biosynthesis protein, malic oxidoreductase, NADH dehydrogenase iron-sulfur protein, expressed protein and bZIP transcription factor) regulating plant height in chickpea. These molecular tags have potential to dissect complex plant height trait and accelerate marker-assisted genetic enhancement for developing cultivars with desirable plant height ideotypes in chickpea.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alleles
  • Basic-Leucine Zipper Transcription Factors / genetics
  • Chromosome Mapping
  • Cicer / genetics
  • Cicer / growth & development*
  • Cicer / physiology
  • Gene Expression Profiling
  • Genetic Linkage / genetics*
  • Genome, Plant / genetics
  • Genome-Wide Association Study
  • Genotype
  • Iron-Sulfur Proteins / genetics
  • Malate Dehydrogenase / genetics
  • Meristem / genetics*
  • NADH Dehydrogenase / genetics
  • Plant Leaves / genetics*
  • Plant Shoots / genetics*
  • Polymorphism, Single Nucleotide / genetics
  • Quantitative Trait Loci / genetics*

Substances

  • Basic-Leucine Zipper Transcription Factors
  • Iron-Sulfur Proteins
  • Malate Dehydrogenase
  • NADH Dehydrogenase