DISOMIC SUBSTITUTION LINES IN WHEAT

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DISOMIC SUBSTITUTION LINES IN WHEAT Copyright of original figures used in this presentation from other sources is duly acknowledged and the copyright remains with its original creator. These have not been used for commercial purpose but for educational use only.

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College of Agriculture CCS Haryana Agricultural University HISAR (Haryana), India

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Relationship between the homozygotes (AA and aa) and the heterozygote (Aa) at a single locus in respect of the phenotypic expression of a polygenic trait. Mid parent is the average of the AA and aa phenotypic values. AA aa Aa + da - da MID PARENT Additive effect of a positive allele A Additive effect of a negative allele a ha

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Development of Disomic Addition/Substitution Lines CHINESE SPRING Step 1 2n either either either …….. So on. 42 40 39 43

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Development of Disomic Addition/Substitution Lines CHINESE SPRING Step 1 2n either either either …….. So on. 42 40 39 43 These plants need to be crossed with normal diploid whose chromosomes are to be added to develop disomic lines

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X C591 Step 2 C591 GROW CROSSED SEED

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Classify all such lines ( cross between nulli CS and C591) as per karyomorphology for C591 Complete series of Disomics CLICK TO SEE NEXT SLIDE……………….

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COMPLETE DISOMIC SERIES 21 Disomic Substitution Lines

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