• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/jgen/099/0084

    • Keywords

       

      biochemical parameters; okra enation leaf curl disease; genetics; okra.

    • Abstract

       

      Okra production in eastern India at present is severely threatened by whitefly-mediated okra enation leaf curl disease(OELCuD). Identification of resistant genotype and understanding the genetic control and biochemical relationship of OELCuD resistanceare prerequisite for developing an effective breeding strategy. This study was conducted employing six populations (P1, P2, F1, F2, BC1 andBC2) of two selected (resistant x susceptible (RxS)) crosses. Associationship between severity of OELCuD and biochemical parametersof parents and hybrids at preflowering and flowering stages was studied. Segregation pattern of the genotypes in F2 generation showingOELCuD reaction of two crosses suggested that two duplicate recessive genes was operative for resistance to OELCuD. Generation meananalysis revealed involvement of both additive and nonadditive effects in the inheritance of disease resistance. Hence, postponement ofselection in later generations or intermating among the selected segregates followed by one or two generations of selfing to break theundesirable linkage and allow the accumulation of favourable alleles could be suggested for the development of stable resistant genotypeagainst this disease. Higher peroxidase activity and total phenol content in leaf emerged as reliable biochemical markers for early selectionof genotype resistant to OELCuD.

    • Author Affiliations

       

      YOGENDRA YADAV1 PRAVEEN KUMAR MAURYA1 TRIDIP BHATTACHARJEE1 SWADESH BANERJEE1 SUBRATA DUTTA2 ASIT KUMAR MANDAL1 ARUP CHATTOPADHYAY1 PRANAB HAZRA1

      1. Faculty of Horticulture, Department of Vegetable Science, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur 741 252, India
      2. Faculty of Agriculture, Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur 741 252, India
    • Dates

       
  • Journal of Genetics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.