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GENETIC DIVERSITY ANALYSIS AND INHERITANCE OF FRUIT TRAITS IN BITTER GOURD (Momordica charantia L.)

KrishiKosh

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Title GENETIC DIVERSITY ANALYSIS AND INHERITANCE OF FRUIT TRAITS IN BITTER GOURD (Momordica charantia L.)
Ph D
 
Creator DALAMU
 
Contributor T.K. Behera
 
Subject livestock, concentrates, diseases, sexual reproduction, calcium, haemoglobin, magnesium, organic compounds, economic systems, biological phenomena
 
Description t-8421
medicinal crop of Indian origin. The genetic variability, heritability, genetic advance, character association and path analysis for 12 quantitative characters were carried out in 50 indigenous and exotic accessions. The experiment was laid out in randomized complete block design with 3 replications in years, 2008-2009 and 2009-2010. Higher genotypic coefficient of variance along with high heritability and genetic advance were recorded for number of fruits per plant, number of seeds per fruit, fruit weight and node bearing first female flower indicating that these traits had additive gene effect and selection will be more effective. Genotypic correlation coefficient among characters indicated significant and positive relation between yield per plant and ovary length, fruit L: D ratio, fruit weight and number of fruits per plant. Cluster analysis grouped genotypes into 9 clusters. The maximum genetic divergence was observed between cluster IX and VI (7.73) followed by cluster VIII and VI (6.98). Principal component analysis (PCA) showed 4 factors define about 65 per cent of variation among characters. These accessions were further analyzed by multilocus RAPD and ISSR marker system. Combined data analysis of RAPD (17) and ISSR (11) markers provided 52.60 % polymorphism with 2.64 polymorphic amplicons per primer. The better discriminatory power of ISSR markers over RAPD markers may be due to comparatively higher values of average polymorphic information content (PIC; 0.40 versus 0.17), resolving power (RP; 1.87 versus 1.14) and marker index (MI; 2.11 versus 0.82) as well as the diverse nature of the genotypes. The clustering of the indigenous germplasm was completely separate from the exotic collection particularly those are originated from China and Thailand.
Genetic effects of fruit yield traits of bitter gourd were studied using generation means analysis in six populations including P1, P2, F1, F2, B1 and B2 generations of cross Pusa Do Mausami × DBG 43. Most of the traits were predominantly governed by dominance and dominance×dominance interaction effects and duplicate epistasis. Visual classifications and chi-square tests performed in the segregating generations of cross Sel-1 × Pusa Do Mausami and Sel-1 × Pusa Vishesh revealed that green fruit colour of bitter gourd was governed by a single pair of dominant nuclear genes and discontinuous ridge on fruit surface was governed by a single dominant gene.
Considering its nutritional values, 20 bitter gourd genotypes were investigated for their macro and micro nutrients content. The mean nitrogen, potassium, manganese, zinc, copper and iron content was higher in sample analyzed with seeds. However, calcium was recorded more in sample analyzed without seeds and mean phosphorus content was at par in both sample types. High estimates of heritability along with high genetic gain were observed for phosphorus, potassium, calcium, copper, iron and manganese content which indicated that the selection for these traits will be effective for improvement of this crop.
 
Date 2016-11-03T14:52:17Z
2016-11-03T14:52:17Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/83700
 
Format application/pdf
 
Publisher iari, 1 GENETIC DIVERSITY ANALYSIS AND INHERITANCE OF FRUIT TRAITS IN BITTER GOURD (Momordica charantia L.) DALAMU DIVISION OF VEGETABLE SCIENCE