Marker detection and genetic analysis for rust resistance of recombinant and backcross inbred lines in groundnut (Arachis hypogaea L.)
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Authors
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Shridevi A. Jakkeral
Department of Genetics and Plant Breeding, University Agricultural Sciences, Dharwad
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H. L. Nadaf
Department of Genetics and Plant Breeding, University Agricultural Sciences, Dharwad
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M. V. C. Gowda
Department of Biotechnology, GKVK Bangalore
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R.S. Bhat
Department of Biotechnology, GKVK Bangalore
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R.K. Patil
Department of Biotechnology, GKVK Bangalore
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Babu Motagi
Department of Biotechnology, GKVK Bangalore
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K. Kenchanagowda
Department of Biotechnology, GKVK Bangalore
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Ganapati Mukri
Directorate of Maize, New Dehli 110 012
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B. Archana
Department of Genetics and Plant Breeding, University Agricultural Sciences, Dharwad
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Prakash Ganagshetty
Department of Genetics and Plant Breeding, University Agricultural Sciences, Dharwad
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K. Gangadhar
Department of Genetics and Plant Breeding, University Agricultural Sciences, Dharwad
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Lalitha Jaggal
Department of Genetics and Plant Breeding, University Agricultural Sciences, Dharwad
Abstract
The present work was conducted to study the genetic variation and identification of microsatellite markers linked to rust resistance in groundnut. An F6mapping population and three backcross populations (BC1F4, BC2F3 and BC3F2) were developed from a cross between the susceptible parent GPBD-5 and resistant parent GPBD-4. There were highly significant differences among recombinants for reaction
to rust. A little difference was observed between PCV and GCV for reaction to rust. High heritability coupled with high genetic advance as per cent of mean was observed for reaction to rust in F6, and backcross populations. Bulk segregant analysis in the segregating population of GPBD-5 x GPBD-4 indicated TC5A06 to be putatively linked to rust resistance i.e., single marker analysis (SMA). This marker can be used in marker assisted selection for rust resistance in groundnut improvement program.