Indian Society of Genetics & Plant Breeding

Mining new scab resistance alleles in apple (Malus × domestica Borkh.) germplasm of Kashmir: Towards breeding scab free apple cultivars

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Apple an important fruit crop in Kashmir ranks first in all

the fruits grown here. It is commercially the most important

horticultural crop grown in temperate parts of the world.

To control scab in Apple a lot of fungicides are being used

however, an alternative approach to fungicide application

is the use of scab resistant cultivars as a genetic stock.

Therefore, there is an urgent need to identify more cultivars

resistant to scab with maximum genes and can be used for

apple breeding. In view of this, one hundred apple cultivars

grown in Kashmir Valley were screened for the presence of

Vf gene conferring resistance against apple scab. Eight

trait linked markers were used so for and among them three

markers like AL07, AM19, and CH05e03 proved to be useful

to distinguish the resistant cultivars from the other apple

germplasm. These three markers have amplified resistant

fragments in five cultivars. Thus out of the total of 100

cultivars investigated in the present study, only five cultivars

namely Shalimar I, Shalimar II, Dubhour, Gold Spur, and

Crab apple were found to harbour resistant alleles which

may be resistant to some of the races of V. inaequalis.

Among the five cultivars harbouring the scab resistant

alleles for some races ofV. inaequalis, three cultivars namely,

Shalimar I, Shalimar II, and Dubhour, which contain the

maximum number of scab resistance alleles can be used as

parents in further breeding programms to develop more

resistant apple cultivars with high market acceptance.

Keywords: Malus × domestica, Apple scab, Vf gene, Venturia inaequalis


Year: 2020
Volume: 80
Issue: 1
Article DOI: 10.31742/IJGPB.80.1.15
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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