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      https://www.ias.ac.in/article/fulltext/jbsc/046/0050

    • Keywords

       

      Genetic mapping; grain length; QTL; Basmati; RIL; SSR.

    • Abstract

       

      Rice grain shape and nutritional quality traits have high economic value for commercial production of rice andlargely determine the market price, besides influencing the global food demand for high-quality rice. Detection,mapping and exploitation of quantitative trait loci (QTL) associated with kernel elongation and grain quality inBasmati rice is considered as an efficient strategy for improving the kernel elongation and grain quality trait inrice varieties. Genetic information in rice for most of these traits is scanty and needed interventions through theuse of molecular markers. A recombinant inbred lines (RIL) population consisting of 130 lines generated fromthe cross involving Basmati 370, a superior quality Basmati variety and Pusa Basmati 1121, a Basmati derivedvariety were used to map the QTLs for 9 important grain quality and yield related traits. Correlation studiesshowed that various components of yield show a significant positive relationship with grain yield. A geneticmap was constructed using 70 polymorphic simple sequence repeat (SSR) markers spanning a genetic distanceof 689.3 cM distributed over 12 rice chromosomes. Significant variation was observed and showed transgressivesegregation for grain quality traits in RIL population. A total of 20 QTLs were identified associatedwith nine yield and quality traits. Epistatic interactions were also identified for grain quality related traitsindicating complex genetic nature inheritance. Therefore, the identified QTLs and flanking marker informationcould be utilized in the marker-assisted selection to improve kernel elongation and nutritional grain qualitytraits in rice varieties.

    • Author Affiliations

       

      MADHVI SHARMA1 SUNIL S GANGURDE2 ROMESH K SALGOTRA1 BUPESH KUMAR3 ANIL K SINGH1 MANISH K PANDEY2

      1. School of Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology, Chatha, Jammu 180 009, India
      2. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad 502 324, India
      3. Division of Plant Breeding and Genetics, She-e-Kashmir University of Agricultural Sciences and Technology, Chatha, Jammu 180 009, India
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