Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810128519
Authors: CHANDRASHEKHAR. T
Advisor: Dr. M. VIJAYA
Title: GENETIC DIVERGENCE FOR YIELD AND YIELD ATTRIBUTES IN BOTTLE GOURD (Lagenaria siceraria (Mol) Standl.) GERMPLASM
Publisher: College of Horticulture, Rajendranagar, HYD-30
Citation: Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabad-30
Language: en
Type: Thesis
Pages: 173
Agrotags: null
Keywords: GENETIC DIVERGENCE FOR YIELD AND YIELD ATTRIBUTES IN BOTTLE GOURD (Lagenaria siceraria (Mol) Standl.) GERMPLASM
Abstract: The present investigation entitled “Genetic divergence for yield and yield attributes in Bottle gourd (Lagenaria siceraria (Mol) Standl.) germplasm” was carried to find out yield component analysis through correlation and path analysis. Thirty two genotypes were evaluated in a Randomized Block Design with three replications during Kharif, 2017 at PG student research farm, College of Horticulture, SKLTSHU, Rajendranagar, Hyderabad. The objective of the experiment was to study the genetic divergence, variability, heritability, genetic advance and to assess the nature of association and correlation of different component characters on yield and screening of Bottle gourd genotypes for downy mildew incidence under natural field condition. The analysis of variance revealed significant difference for twenty characters studied and reported that there was sufficient amount of variability exist among the genotypes. Wide range of variability was observed for weight of the fruit, fruit length, number of nodes per plant, flesh thickness, days to first fruit harvest, days to last fruit harvest, yield per plant and total yield indicating the scope for selection of suitable initial breeding material for further improvement. The D2 analysis was carried out for twenty characters, which partitioned the thirty two genotypes into eight clusters. The maximum intra cluster values was observed in cluster VI followed by Cluster IV. The inter cluster D2 values of the eight clusters revealed that highest inter cluster generalized distance was between cluster VIII and VII followed by cluster VII and VI cluster. Fruit length contributed maximum towards divergence followed by weight of the fruit, rind thickness, total soluble solids, flesh thickness, number of fruits per plant, fruit diameter, yield per plant, number of nodes per plant, node at which first female flower appears, total vine length, number of primary branches per plant and days to first female flower appearance. If a breeding programme is used at improving nutritional characters, then cluster III showing maximum total soluble solids and cluster VI and VIII showing maximum ascorbic acid that can be utilized in breeding programme. High PCV and GCV estimates were recorded for number of nodes per plant, internode length, node at which first female flower appears, weight of the fruit, fruit length, fruit diameter, flesh thickness, rind thickness, yield per plant and total yield. The difference between PCV and GCV values were minimum. Genetic advance estimates were high (>20%) for number of nodes per plant, weight of the fruit, flesh thickness and total yield. Genetic advance as per cent of mean was high (>20%) for total vine length, node at which first female flower appears, number of fruits per plant, weight of the fruit, fruit length, fruit diameter, flesh thickness, rind thickness, yield per plant, total yield and total soluble solids. Aforesaid traits recorded high h2(b) (>60%) estimates also. From correlation studies, it was observed that fruit yield per plant has exhibited highly significant positive association with days to first male flower appearance, days to first female flower appearance, days to first fruit harvest, days to last harvest, number of fruits per plant, weight of the fruit, fruit length and total yield. Path analysis revealed that maximum positive direct effect on fruit yield per plant was exhibited by number of nodes per plant, internode length, days to first fruit harvest, days to last harvest, number of fruits per plant, weight of the fruit, fruit length, fruit diameter, flesh thickness and total yield. Three genotypes viz., viz., viz., viz., viz., viz., IC -382188, IC -446557 and IC446557 and IC446557 and IC 446557 and IC446557 and IC446557 and IC446557 and IC446557 and IC 446557 and IC446557 and IC446557 and IC-539711 539711 539711 539711 539711 539711 539711 were found to show moderately resistant reaction against downy mildew. In addition to the genetic divergence, considering the mean performance of the genotypes among the different traits studied, the following were identified as promising lines. Six genotypes viz., IC-539711, IC-353408, IC-539696 and IC-522857 from IV and IC-382188 from VI and IC-446557 from VII clusters for yield per plant. Three genotypes viz., IC-316017-1 from I and IC-539711, IC-353408 from IV clusters for earliness. One genotype IC-522870 from V cluster for number of primary branches per plant. One genotype viz., IC-331088 from III clusters for fruit quality were superior and they can be used for future breeding programmes.
Description: The present investigation entitled “Genetic divergence for yield and yield attributes in Bottle gourd (Lagenaria siceraria (Mol) Standl.) germplasm” was carried to find out yield component analysis through correlation and path analysis. Thirty two genotypes were evaluated in a Randomized Block Design with three replications during Kharif, 2017 at PG student research farm, College of Horticulture, SKLTSHU, Rajendranagar, Hyderabad. The objective of the experiment was to study the genetic divergence, variability, heritability, genetic advance and to assess the nature of association and correlation of different component characters on yield and screening of Bottle gourd genotypes for downy mildew incidence under natural field condition. The analysis of variance revealed significant difference for twenty characters studied and reported that there was sufficient amount of variability exist among the genotypes. Wide range of variability was observed for weight of the fruit, fruit length, number of nodes per plant, flesh thickness, days to first fruit harvest, days to last fruit harvest, yield per plant and total yield indicating the scope for selection of suitable initial breeding material for further improvement. The D2 analysis was carried out for twenty characters, which partitioned the thirty two genotypes into eight clusters. The maximum intra cluster values was observed in cluster VI followed by Cluster IV. The inter cluster D2 values of the eight clusters revealed that highest inter cluster generalized distance was between cluster VIII and VII followed by cluster VII and VI cluster. Fruit length contributed maximum towards divergence followed by weight of the fruit, rind thickness, total soluble solids, flesh thickness, number of fruits per plant, fruit diameter, yield per plant, number of nodes per plant, node at which first female flower appears, total vine length, number of primary branches per plant and days to first female flower appearance. If a breeding programme is used at improving nutritional characters, then cluster III showing maximum total soluble solids and cluster VI and VIII showing maximum ascorbic acid that can be utilized in breeding programme. High PCV and GCV estimates were recorded for number of nodes per plant, internode length, node at which first female flower appears, weight of the fruit, fruit length, fruit diameter, flesh thickness, rind thickness, yield per plant and total yield. The difference between PCV and GCV values were minimum. Genetic advance estimates were high (>20%) for number of nodes per plant, weight of the fruit, flesh thickness and total yield. Genetic advance as per cent of mean was high (>20%) for total vine length, node at which first female flower appears, number of fruits per plant, weight of the fruit, fruit length, fruit diameter, flesh thickness, rind thickness, yield per plant, total yield and total soluble solids. Aforesaid traits recorded high h2(b) (>60%) estimates also. From correlation studies, it was observed that fruit yield per plant has exhibited highly significant positive association with days to first male flower appearance, days to first female flower appearance, days to first fruit harvest, days to last harvest, number of fruits per plant, weight of the fruit, fruit length and total yield. Path analysis revealed that maximum positive direct effect on fruit yield per plant was exhibited by number of nodes per plant, internode length, days to first fruit harvest, days to last harvest, number of fruits per plant, weight of the fruit, fruit length, fruit diameter, flesh thickness and total yield. Three genotypes viz., viz., viz., viz., viz., viz., IC -382188, IC -446557 and IC446557 and IC446557 and IC 446557 and IC446557 and IC446557 and IC446557 and IC446557 and IC 446557 and IC446557 and IC446557 and IC-539711 539711 539711 539711 539711 539711 539711 were found to show moderately resistant reaction against downy mildew. In addition to the genetic divergence, considering the mean performance of the genotypes among the different traits studied, the following were identified as promising lines. Six genotypes viz., IC-539711, IC-353408, IC-539696 and IC-522857 from IV and IC-382188 from VI and IC-446557 from VII clusters for yield per plant. Three genotypes viz., IC-316017-1 from I and IC-539711, IC-353408 from IV clusters for earliness. One genotype IC-522870 from V cluster for number of primary branches per plant. One genotype viz., IC-331088 from III clusters for fruit quality were superior and they can be used for future breeding programmes.
Subject: Vegetable Science
Theme: GENETIC DIVERGENCE FOR YIELD AND YIELD ATTRIBUTES IN BOTTLE GOURD
Research Problem: GENETIC DIVERGENCE FOR YIELD AND YIELD ATTRIBUTES IN BOTTLE GOURD (Lagenaria siceraria (Mol) Standl.) GERMPLASM
These Type: M.Sc
Issue Date: 2018-06-29
Appears in Collections:Thesis

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