GENETIC VARIABILITY AND MOLECULAR CHARACTERIZATION IN ONION (Allium cepa L.)

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dc.contributor.advisorGASTI, VILAS D.
dc.contributor.authorHUGAR, HANAMANT M.
dc.contributor.otherEVOOR, SHASHIKANTH
dc.contributor.otherMULLA, SAYEED WAJEED R.
dc.contributor.otherMASTIHOLI, ANAND B.
dc.contributor.otherY. S., MAHESH
dc.date.accessioned2020-10-05T07:55:28Z
dc.date.available2020-10-05T07:55:28Z
dc.date.issued2018-07
dc.description.abstractA field experiment was conducted during late Kharif 2017-18 to study the genetic variability, correlation, path coefficient analysis, genetic diversity and molecular characterization for growth, bulb and quality related characters in onion with 40 genotypes in randomized block design with two replications. The quantum of genetic variation as indicated by the higher values of genotypic co-efficient of variation (GCV) was highest in number of centers per bulb and bulb weight followed by neck thickness of bulb. However, the character plant height at 30 DAT with least GCV as compared to the other characters. High heritability coupled with moderate genetic advance as percentage of mean were reported for the bulb yield per plot, total yield, T.S.S. of bulb, marketable yield, plant height at 60 DAT and polar bulb diameter. The high heritability coupled with high genetic advance as percentage of mean for traits like bulb weight, neck thickness of bulb and number of centers per bulb. The character association studies revealed that bulb weight showed positive and significant correlation with growth as well as bulb related trait. Results of path coefficient analysis of various characters contributing towards bulb weight showed that number of leaves per plant at 30 DAT had highest positive direct effect followed by plant height at 90 DAT, days to maturity, polar bulb diameter, leaf area index, neck thickness of bulb, equatorial bulb diameter and plant height at 30 DAT. Mahalanobis D2 analysis indicated considerable diversity and 40 genotypes were grouped into seven clusters. The cluster VII showed maximum intra cluster diversity. Inter cluster distance revealed the maximum divergence between clusters II and IV. Neck thickness of bulb contributed maximum to overall genetic diversity. From the study it can be concluded that the genotypes ON-24, ON-8, Bhima Super and ON-22 recorded higher yield and found superior over all other genotypes. Based on SSR marker assay, 40 onion genotypes were analyzed. The PIC values ranged from 0.07 to 0.77 with an average of 0.38. It may be concluded that the primer ACM134 and ACM138 can be used for genetic diversity analysis in onion.en_US
dc.identifier.issnUHS16PGM790
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810152372
dc.keywordsONION, T431en_US
dc.language.isoEnglishen_US
dc.pages141en_US
dc.publisherUniversity of Horticultural Sciences, Bagalkoten_US
dc.research.problemThesisen_US
dc.subVegetable Scienceen_US
dc.themeGENETIC VARIABILITY AND MOLECULAR CHARACTERIZATION IN ONION (Allium cepa L.)en_US
dc.these.typeM.Scen_US
dc.titleGENETIC VARIABILITY AND MOLECULAR CHARACTERIZATION IN ONION (Allium cepa L.)en_US
dc.typeThesisen_US
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