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Electronic Journal of Plant Breeding
Year : 2019, Volume : 10, Issue : 3
First page : ( 1133) Last page : ( 1139)
Online ISSN : 0975-928X.
Article DOI : 10.5958/0975-928X.2019.00144.3

Screening the genotypes of sorghum (Sorghum bicolor (L.) Moench) BC1 F3 generation of the cross CO (S) 28 x IS18551 for shoot fly (Atherigona soccata (Rond.) resistance

Abinaya M.L.1,*, Kumaravadivel N.2, Varanavasiappan S.3, Kavithamani D.4

1M. Sc student, Department of Plant Biotechnology, Centre for Plant Molecular Biology, TNAU, Coimbatore-641003

2Professor and Head, Department of Plant Molecular Biology and Bioinformatics, CPMB&B, TNAU, Coimbatore-641003

3Assistant Professor, Department of Plant Biotechnology, Centre for Plant Molecular Biology, TNAU, Coimbatore-641003

4Assistant Professor, Department of Millets, Centre for Plant Breeding and Genetics, TNAU, Coimbatore-641003

*E-Mail: mlabinaya@gmail.com

Online published on 16 October, 2019.

Abstract

Screening of sorghum genotypes of BC1F3 generation of the cross CO (S) 28 x IS18551 for shoot fly [Atherigona soccata (Rondani)] resistance was carried out during kharif 2018–19. The segregating population was subjected to Foreground selection using SSR markers flanking QTLs imparting shoot fly resistance which is in the linkage group SBI-05 and SBI-10. From the 100 plants, 29 plants with 4 QTLs, 35 plants with 3 QTLs, 24 plants with 2 QTLs and 9 plants with 1 QTL have been identified. Shoot fly component traits and phenotypic observations were recorded for the same 100 plants. Shoot fly infestation was found to be very less in the sorghum lines harboring 4 QTLs. Based on the genotypic data, 10 lines were selected and forwarded to next generation to study the agronomic performance. Grain yield per plant was comparatively higher in BC1F4 generation because of reduced infestation of shoot fly.

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Keywords

Sorghum shoot fly, screening, SSR Markers and resistant QTLs and shoot fly component traits.

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