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Acharya Narendra Deva University of Agriculture & Technology, Ayodhya

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20211
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Subject: Genetics and Plant Breeding × Author: Chaudhary, Amit Kumar × Start date: 2020 × Type: Thesis ×
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    ThesisItemOpen Access
    Studies on combining ability and heterosis for yield and its contributing traits in faba bean (Vicia faba L.) under sodic condition
    (ANDUAT, Kumarganj, Ayodhya, 2021-06-30) Chaudhary, Amit Kumar; Nath, Shiva
    The present investigation entitled “Studies on combining ability and heterosis for yield and its contributing traits in faba bean (Vicia faba L.) under sodic condition” was undertaken to examine the to work out the genetic variability for the yield and quality traits, to compute associations at genotypic and phenotypic levels among different characters and analyze direct and indirect effects of different characters on grain yield, to study the combining ability variances and their effects, to find out gene action involved in the inheritance of various characters, to estimate heterosis over better-parent and standard varieties and inbreeding depression, to estimate heritability and genetic advance in per cent of mean for yield and other characters. Screening of genotypes against diseases comprised of 15 lines and 3 testers recommended for sodic soil. These experiments were conducted at the Genetics and Plant Breeding Research Farm of A. N. D. University of Agriculture & Technology, Narendra Nagar (Kumarganj), Ayodhya 224 229 (U.P.) during Rabi, 2017, 2018 and 2019. In the experiment, a line x tester set of 45 F1’s and F2’s (generated during 2017-18 and 2018-19) along with 18 parents (15 lines and 3 testers) and two checks were evaluated for fifteen characters in randomized complete block design with three replications during Rabi 2019-20. The analysis of variance revealed that mean squares due to treatment highly significant for all the characters in F1’s and F2’s. The estimates of sca variance were higher than the corresponding estimates of gca variance for all the traits. The values of the average degree of dominance were more than unity (>1) revealing overdominance for fifteen characters. The predictability ratio was lesser than one (<1) for the all characters. High heritability (h2bs) coupled with very high genetic advance in per cent of mean was observed for leaf nitrogen, grain yield per plant, chlorophyll content, biological yield per plant, number of pods per plant in F1’s crosses while in F2’s crosses; leaf nitrogen, biological yield per plant.