Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810101185
Authors: Chhetri, Ashok
Advisor: Hazarika, B.N.
Other: Wangchu, L.
Title: Studies on genetic diversity of Jackfruit (Artocarpus heterophyllus Lam.) in the North-Eastern region
Publisher: College of Horticulture and Forestry, Central Agricultural University, Pasighat
Language: en
Type: Thesis
Pages: xiv+157
Agrotags: null
Keywords: Cluster analysis, jackfruit, northeast India, RAPD, SSR, principal component.
Abstract: The present investigation was carried out on forty genotypes of jackfruit (Artocarpus heterophyllus Lam.) to determine the magnitude of variability present in the material and association among different traits. Molecular markers like RAPD and SSR were used to assess the diversity among the genotypes collected from six North-Eastern states viz. Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram and Tripura. The analysis of variance of the present investigation disclosed significant variations in all the studied characters which indicate the scope of selection for subsequent breeding programme based on these characters especially. Among the forty investigated genotypes, genotype T3 produced fruits with maximum fruit length, fruit diameter, fruit weight, flake length, seed length and fruit yield per tree. Genotype T13 produced fruits with maximum flake length, weight of fresh flake with seed, weight of fresh flake without seed, seed width and 100-seed weight. Genotype T17 produced fruits with maximum number of flakes per kg of fruit. With respect to qualitative character, genotype T14 bears fruit which contains highest TSS and reducing sugars. The phenotypic coefficients of variability and genotypic coefficients of variability were recorded high for weight of fresh flake without seed (52.69 % & 50.52 %), stalk length (51.09 % & 49.06 %) and fruit weight (48.11 % & 45.86 %). High heritability coupled with high genetic gain was noticed for stalk length, fruit weight, weight of fresh flake with seed and weight of fresh flake without seed. Genetic advance was reported highest for 100-seed weight followed by stalk length and lowest for flake/fruit ratio followed by seed width. Yield per plant exhibit significant and positive genotypic correlation coefficient with fruit diameter, fruit length, rachis diameter, fruit weight, petiole length and flake length. The path coefficient analysis showed that weight of fresh flake with seed has maximum positive direct effect on fruit yield per tree followed by weight of flakes per kg of fruit. The inter-cluster distance was found higher than intra cluster distance. The intra-cluster distance was maximum (265.809) in cluster-III followed by cluster-I. The highest (2154.49) inter-cluster distance was recorded between cluster-II and IV and lowest was observed between cluster-III and V. The RAPD analysis identified OPA-01, OPG-03 and OPC-07 as the polymorphic primer. In SSR technique, 10 primers have been identified to produce polymorphic bands
Description: The present investigation was carried out on forty genotypes of jackfruit (Artocarpus heterophyllus Lam.) to determine the magnitude of variability present in the material and association among different traits. Molecular markers like RAPD and SSR were used to assess the diversity among the genotypes collected from six North-Eastern states viz. Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram and Tripura. The analysis of variance of the present investigation disclosed significant variations in all the studied characters which indicate the scope of selection for subsequent breeding programme based on these characters especially. Among the forty investigated genotypes, genotype T3 produced fruits with maximum fruit length, fruit diameter, fruit weight, flake length, seed length and fruit yield per tree. Genotype T13 produced fruits with maximum flake length, weight of fresh flake with seed, weight of fresh flake without seed, seed width and 100-seed weight. Genotype T17 produced fruits with maximum number of flakes per kg of fruit. With respect to qualitative character, genotype T14 bears fruit which contains highest TSS and reducing sugars. The phenotypic coefficients of variability and genotypic coefficients of variability were recorded high for weight of fresh flake without seed (52.69 % & 50.52 %), stalk length (51.09 % & 49.06 %) and fruit weight (48.11 % & 45.86 %). High heritability coupled with high genetic gain was noticed for stalk length, fruit weight, weight of fresh flake with seed and weight of fresh flake without seed.
Subject: Fruit Science
Theme: Genetic diversity of jackfruit
Research Problem: 1.To study the nature and extent of genetic variability in jackfruit germplasm for growth, yield and quality parameters. 2. To study the association of different horticultural traits with the yield. 3. To assess the extent of genetic diversity in the available jackfruit germplasm. 4. To select the superior genotypes of jackfruit.
These Type: Ph. D.
Issue Date: 2019-04-24
Appears in Collections:Thesis

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