Genome wide association mapping for identification of QTL(S) underlying resistance to Alternaria blight (Alternaria brassicae (Berk) Sacc.) in Indian mustard (Brassica juncea L. Czern. & Coss.)”

Disease screening against Alternaria blight under field condition showed that, none was free from disease only 13 genotypes were found MR and 152 genotypes were found MS, 252 S and 3HS. The high estimate of phenotypic and genotypic coefficient of variation was recorded for YPP and SB., high estimate of broad sense heritability was recorded all characters except YPP. The genetics advance in per cent of mean was found high for PB, high heritability along with high genetic advance was observed for HPF. At phenotypic and genotypic level both YPP shoes highly significant and positive correlation. At phenotypic and genotypic level path coefficient reveled that in HPF, PL. The genotypes were grouped into eight different non overlapping cluster (five 115, three 100, six 84, one 78, seven 37 and three, two and four 1, eight 36 genotypes). The maximum and minimum inter cluster distance was between six, eight and one, three. One highest cluster mean for PH, MAT, and HPF and two (MAT, PH, HPF). Three (MAT, PH, HPF) four (MAT, PH, HPF) five (PH, MAT, HPF) six (MAT, PH, HPF) seven (MAT, HPF. PH), eight had no values due to reason no geminated or un survived plant and GWAS analysis of identified six significant association for Alternaria blight resistance on chromosome (A07, A09, A03, B07, B04, B03) respectively, This study showed that the diversity panel of Indian mustard identified QTLs for controlling of disease resistance against Alternaria blight in Indian mustard.