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Deciphering Genetic Basis of Complex Traits for Crop Improvement

Author Affiliations

  • 1Department of Genetics and Plant Breeding, GBPUAT, Pantnagar - 263 145, Uttarakhand, INDIA
  • 2Department of Plant Pathology, GBPUAT, Pantnagar - 263 145, Uttarakhand, INDIA
  • 3Department of Genetics and Plant Breeding, GBPUAT, Pantnagar - 263 145, Uttarakhand, INDIA
  • 4National Fertilizer Limited, INDIA

Res. J. Agriculture & Forestry Sci., Volume 1, Issue (9), Pages 14-18, October,8 (2013)


In current biology, a greater challenge is to know the genetic basis of complex traits or quantitative traits which is controlled by the cumulative effects of quantitative trait loci (QTLs), epistasis, environment and interaction between quantitative trait locus (QTL) and environment. Availability of molecular markers and linkage maps have made it possible to understand the genetic basis of complex traits through the marker-based mapping to locate the chromosomal regions or QTLs of interest. Linkage analysis based mapping, association mapping and nested association mapping (NAM) are most commonly used methods for understanding the genetic basis underlying quantitative variation which will help in improving traits such as yield, nutritional quality and resistance to abiotic and biotic stress by developing new insights and methodologies.


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