Genetic analysis heterosis and Combining ability Analysis of yield and its related traits in bread wheat Triticum Aestivum l

Abstract

ABSTRACT newlineTitle of the Thesis : Genetic analysis, heterosis and combining ability analysis of newlineyield and its related traits in bread wheat (Triticum aestivum L.) newlineName of the Scholar : Jitendra Mandrah newlineRegistration Number: AU193090 newlineName of Supervisor : Dr. Kanak Saxena newlineName of University : Faculty of Agriculture, Rabindranath Tagore newlineUniversity, Raisen (M.P) newlineABSTRACT newlineThe experiment was undertaken to estimate the genetic variability and correlation newlinecoefficient and path analysis of yield and yield contributing traits in 40 F1s generated by newlinecross of ten genetically diverse promising genotypes with well adapted 4 testers of wheat newlinecultivars grown in Randomized block design with three replications at Agriculture newlineResearch Farm, Faculty of Agriculture, Rabindranath Tagore University, Bhopal, newlineMadhya Pradesh. during rabi season 2019-20. The analysis of variance revealed that the newlinetreatments were highly significant for all the characters. The higher magnitudes of newlinegenotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) newlinewere recorded for grain yield per plant, biological yield per plant, tillers per plant, harvest newlineindex, grains per ear and 1000-grain weight respectively. The high heritability in broad newlinesense was estimated for all the characters. High value of heritability indicates that it may newlinebe due to higher contribution of genotypic components. High heritability coupled with newlinehigh genetic advance as percent of means were recorded for tillers per plant, number of newlineears/plant, grains/ear, 1000-grain weight, biological yield per plant, grain yield per plant newlineand harvest index. The correlation coefficients estimate showed high direct genotypic and newlinephenotypic correlations for with all the traits studied except 1000-grain weight. Path newlineanalysis showed that biological yield had highest direct positive effect on grain yield newlinefollowed by harvest index, 1000-grain weight, tillers per plant and ear weight, thereby newlineindicated that these were main contributors to the grain yield. newlineKeywords: Wheat, Genetic variability