Genetics of rust resistance in mutants and interspecific derivatives of groundnut (Arachis hypogaea L.)

Motagi, B.N. and Angadi, C.C. and Gowda, M.V.C. and Naidu, G.K. (2013) Genetics of rust resistance in mutants and interspecific derivatives of groundnut (Arachis hypogaea L.). Karnataka Journal of Agricultural Science, 26 (1). pp. 14-16.

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Abstract

Rust is the major foliar disease limiting yield and quality in groundnut. Mutants and interspecific derivatives are important sources of resistance to rust. Crosses involving mutants and inter-specific derivatives viz., crosses involving mutants (VL 1, 28-2, 45, 45 (S) and 110) and inter-specific derivatives (ICGV 87165, D 39d and B 37c), viz., 110 × VL 1, 45 × 45 (S), VL 1 × ICGV 87165, 110 × ICGV 87165, 28-2 × D 39d, 28-2 × B 37c and B 37c × D 39d were made to discern the genetic basis of rust resistance. Mutant VL 1 was resistant while mutants 28-2, 45 and 110 were susceptible to rust. Interspecific derivatives, ICGV 87165, D 39d and B 37c were resistant to rust. All the hybrids (F1’s) showed moderately susceptible (S) reaction indicating partial dominance nature of genes governing resistance (R). Segregation in F2 revealed involvement of duplicate recessive genes in both the mutants and interspecific derivatives conditioning rust resistance. F3 breeding behaviour confirmed the proposed segregation ratios. Four-locus model was proposed to formulate the genotypic constitution of the parents based on genetic hypotheses. Further, independent recessive genes governed rust resistance in mutational and inter-specific sources

Item Type: Article
Uncontrolled Keywords: Groundnut, Induced Mutation, Interspecific Hybridization, Resistance, Rust
Author Affiliation: Department of Genetics and Plant Breeding, University of Agricultural Sciences, Dharwad - 580 005, India
Subjects: Crop Improvement
Divisions: Groundnut
Depositing User: Mr B Krishnamurthy
Date Deposited: 03 Jul 2013 05:00
Last Modified: 03 Jul 2013 05:00
URI: http://eprints.icrisat.ac.in/id/eprint/10804

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