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
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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