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Genetic diversity and population structure of Indian melon ( Cucumis melo L .) landraces with special reference to disease and insect resistance loci
Author(s) -
Reddy D. C. Lakshamana,
Venkat Sudarshini K,
Reddy Anand C,
Aswath C.,
Avinash K. N.,
Nandini H.,
Sreenivasa Rao E.
Publication year - 2016
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12356
Subject(s) - biology , melon , cucumis , genetic diversity , population , plant disease resistance , microbiology and biotechnology , allele , germplasm , resistance (ecology) , marker assisted selection , veterinary medicine , genetics , agronomy , genetic marker , botany , horticulture , gene , medicine , demography , sociology
This study was aimed to examine the genetic diversity and population structure of Indian melon landraces with special reference to disease and insect resistance loci. Thirty‐six simple sequence repeat ( SSR ) markers along with seven markers at disease and insect resistance loci were used for this purpose on a panel of 91 accessions available at Indian Institute of Horticultural Research, Bengaluru, India. Model‐based structure analysis revealed the presence of four groups that were consistent with the results of principal coordinate analysis ( PC oA). The delineation of populations was mostly based on geography with improved varieties as a separate group. Ten accessions have been identified to possess beneficial alleles at all the selected disease resistance loci and shall be useful for incorporating multiple disease resistance after phenotypic validation. The results obtained in the current study demonstrate the importance of the Indian melon group as a valuable genetic reservoir and the need to plan strategies for its conservation and utilization in breeding programmes.