National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Scab caused by Venturia inaequalis (Cke.) Wint. is the most important fungal disease of apple. The development and deployment of genetic resistance is reliable and a safe option to combat the dreaded disease with palpable advantage as compared to chemical control. A variety Firdous developed by SKUAST-K has been known for its resistance, however, genetic basis of resistance has not been proved or established till date. An initiative was taken to cross the scab resistant variety, Firdous to susceptible cultivar Gala that resulted into population of 110F1 plants. Among these derived F1s 46 were tested for presence of Vf gene using the linked SCAR marker. The marker analysis helped us to identify resistance specific alleles for gene Rvi6 in 25 out of 46 F1s. The F1 population was also screened using a mono-conidial mixture of four races viz., (0), (1), (2) and (1, 2) under controlled conditions. A fair degree of correlation existed between allelic information and reaction phenotype that indicated the presence of Rvi6 in Firdous. Further, the F1 population was screened for the markers linked to fruit firmness. The combined information of both the markers may help us to identify individuals which are resistant to scab and carry favourable alleles for fruit firmness required for better storage and quality.
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