Author(s):

Khushboo Azam, Hidayatullah Mir, Bishun Deo Prasad and Feza Ahmad

Abstract: Mango (Mangifera indica L.) is considered an important fruit crop in the tropical and sub-tropical world due to its high nutritious quality, rich flavour and high marketing value. Knowledge about the extent of genetic diversity is the major component in designing future breeding strategies for a sustainable mango production. It is important to couple phenotypic characterization with genetic diversity analysis for germplasm conservation in gene bank. In this study, 20 mango cultivars were characterized for flowering and fruit traits using 17 simple sequence repeat (SSR) loci. Sixteen polymorphic markers with their alleles were subjected to marker trait association with 16 phenotypic traits. Step wise linear regression method was followed to study the marker-trait association and only the markers showing significant association in terms of phenotypic variance (R²) were taken into consideration. The markers having significant association with the economic traits varied from one (fruit volume, titratable acidity, ascorbic acid, reducing sugars, total sugars and total number of flowers) to eight (no. of hermaphrodite flowers). The highest phenotypic variance was obtained for number of hermaphrodite flowers (0.974) which was explained together by eight alleles, with highest contribution by marker mMICIR027. The information about association of markers with the economic traits of mango, after further validation, will be helpful in selecting markers for screening varieties with particular trait and will assist in mango breeding programme.

Pages: 2830-2834  |  1208 Views  391 Downloads

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