Introgression and characterization of alloplasmic male sterile lines in brinjal (Solanum melongena L.)
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Date
2017
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Punjab Agricultural University, Ludhiana
Abstract
A study was conducted to introgress and characterize male sterile lines carrying alloplasmic cytoplasm of S. aethiopicum into S. melongena at Punjab Agricultural University, Ludhiana. Three backcross generations viz. BC3, BC4 and BC5 were evaluated along with 12 recurrent parents for twenty-three morphological traits in Factorial Randomized Complete Block Design during 2015-16. The analysis of variance indicated significant variability among all the genotypes for all the traits, however among generations petiole length, leaf blade width, calyx size, pedicel length and fruit length displayed non-significant differences. The vegetative growth of CMS-backcross progenies was vigorous than their fertile counterparts. Non-availability of viable pollen in shriveled anthers in all the backcross generations indicated stable expression in all genotypes. All CMS-lines viz. BR 104A, MR 319A, BL 219A, BL 201A, BL 214A, BL 12-4A, BL 216A, SR 5A, P 67A, SR 232A SR 93-213A and CB 99-231A in BC5 generation were morphologically similar in flower traits with respective recurrent parent (B-line), except petal size, stamen size and days to 50% flowering. Significant differences among fruit traits except fruit length were found in A and B-lines. Genetic variability estimates revealed high genotypic co-efficient of variability, heritability and genetic advance for all the fruit characteristics in all the generations. The overall recovery of all the characteristics in BC5 generation was 97.98%. The availability of male sterile lines in diverse genetic backgrounds would be useful in heterosis breeding of brinjal.
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