Inheritance for ToLCV and EB resistance in tomato using  S. habrochaites and S. pimpinellifolium

Ramesh Kumar Singh; Nagendra Rai

doi:10.48165/

Authors

Ramesh Kumar Singh ICAR-Indian Institute of Vegetable Research, Varanasi 221 305, Uttar Pradesh, India
Nagendra Rai ICAR-Indian Institute of Vegetable Research, Varanasi 221 305, Uttar Pradesh, India

DOI:

https://doi.org/10.48165/

Keywords:

Tomato, Interspecific crosses, Resistance, ToLCV, EB, Genetics

Abstract

Two accessions of wild species of tomato, viz. EC-520060 (Solanum habrochaites) and EC-521080 (Solanum pimpinellifolium) have been utilized for introgression of ToLCV and EB resistant gene into 12 susceptible cultivars bearing good yield traits. Most of the crosses of EC-520060 exhibited 13 (resistant): 3 (susceptible) genetic ratio but 'Flora Dade × EC-520060' expressed 3:1 genetic ratio. The crosses of EC-521080 have diverse genetic ratio of 1:2:1, 3:1 and 1:3. In result of inheritance of EB, the crosses of EC-520060 revealed 3:1 genetic ratio, and the crosses of EC-521080 represented 1:3, 1:2:1 and 3:1 genetic ratio. The crosses of EC-520060 and EC-521080 showed additive, dominance × dominance and additive × additive genetic models for both ToLCV and EB diseases. The inheritance among crosses and genetics of variables can be utilized for improvement of resistant tomato.

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