ItemArticle

Genetics Analysis and Identification of SSR Makers Linked to Downy Mildew Resistance Through BSA in Cucumber (Cucumis sativus L.)

Title
Genetics Analysis and Identification of SSR Makers Linked to Downy Mildew Resistance Through BSA in Cucumber (Cucumis sativus L.)
Creator
Bommesh, J.C.; Pitchaimuthu, M.; Manjunathagowda, D.C.; Ravishankar, K.V.; Manjesh, M.
Description
The research was carried out to divulge the genetics of inheritance, nature of gene action, correspondingly to identify the SSR markers linked to downy mildew resistance in cucumber. The parents Swarna Agethi and IIHR-438 were used and developed six generations (P1, P2, F1, F2, BC1 and BC2), the parents, filial generations and backcross populations were deployed for genetic studies. The Mendelian segregation suggested that the downy mildew resistance was governed by two pairs of recessive genes with inhibitory recessive epistasis (3 resistant: 13 susceptible) gene interaction. IIHR-438 possessed a higher degree of resistance; and epistatic interaction (additive dominance) was of greater importance than the main effect. Bulk segregant analysis (BSA) aided in identifying the two SSR markers (SSR 35 and SSR 413), which had polymorphism between resistant and susceptible bulk, and the markers among backcross population segregated in an equal (1:1) ratio. Genetic distance between identified markers was found to be 16.6 cM from the QTL IciMapping V3.2 software, which depicted two new quantitative trait loci (QTLs) on chromosome number 3. These findings on genetics of downy mildew resistance provide an implication to advance the reciprocal recurrent selection followed by pedigree selection to aid in the development of resistant varieties in cucumber. 2025 Wiley-VCH GmbH. Published by John Wiley & Sons Ltd.
Source
Plant Breeding;
Date
01-01-2025
Publisher
John Wiley and Sons Inc
Subject
BSA; cucumber; Downy mildew; resistance; SSR marker
Coverage
Bommesh J.C., Department of Horticulture, College of Agriculture, V C Farm Mandya, University of Agricultural Sciences, Mandya, Karnataka, Mandya, India; Pitchaimuthu M., Division of Vegetable Crops, ICAR-Indian Institute of Horticultural Research, Karnataka, Bengaluru, India; Manjunathagowda D.C., Division of Vegetable Crops, ICAR-Indian Institute of Horticultural Research, Karnataka, Bengaluru, India; Ravishankar K.V., Division of Basic Sciences, ICAR-Indian Institute of Horticultural Research, Karnataka, Bengaluru, India; Manjesh M., Department of Life Sciences, Christ University, Karnataka, Bengaluru, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 1799541; CODEN: PLABE
Format
online
Language
English
Type
Article

Citation

Bommesh, J.C.; Pitchaimuthu, M.; Manjunathagowda, D.C.; Ravishankar, K.V.; Manjesh, M., “Genetics Analysis and Identification of SSR Makers Linked to Downy Mildew Resistance Through BSA in Cucumber (Cucumis sativus L.),” CHRIST (Deemed To Be University) Institutional Repository, accessed June 19, 2026, https://archives.christuniversity.in/items/show/22981.

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