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Genetic divergence in seed characteristics of guava: A basis for parent selection in hybridization

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Title Genetic divergence in seed characteristics of guava: A basis for parent selection in hybridization
Not Available
 
Creator S Rajan, LP Yadava, Ram Kumar, SK Saxena
 
Subject Guava, Psidium guajava L., seed content, fruit, genetic divergence, Mahalanobis D2 statistics.
 
Description Not Available
The efficiency of guava breeding programme for low seed content can be enhanced by choosing superior
cross combination made by divergent clones. The nature and magnitude of genetic divergence was assessed for
fruit weight and six seed characters using Mahalanobis D2 statistics in 68 guava accessions maintained at the
National Active Germplasm Site, CISH, Lucknow. Tocher’s method grouped all genotypes into five distinct clusters.
Genotypes falling in clusters IV and V were highly diverse from each other. Mean fruit weight and fruit: seed weight
proportion were higher in cluster I and V, respectively. Furthermore, cluster V had the minimum number of seeds
fruit-1, seed weight fruit-1, 100-seed weight, number of seeds 100 g-1 fruit and seed content, and cluster I had high
number of seeds fruit and seed weight fruit-1. Mean number of seeds 100 g-1 fruit and seed content was highest in
cluster III whereas, cluster IV had the maximum value of 100-seed weight. Cluster analysis using Ward’s method
also revealed the similar group patterns with five distinct groups. Thus, for selecting desired genotypes with better
seed characteristics, population can be raised by hybridizing accessions from cluster IV and I.
Not Available
 
Date 2017-10-17T10:42:29Z
2017-10-17T10:42:29Z
2007-09-01
 
Type Research Paper
 
Identifier Not Available
Print ISSN: 0972-8538. Online ISSN: 0974-0112
http://krishi.icar.gov.in/jspui/handle/123456789/5554
 
Language English
 
Relation Not Available;
 
Publisher The Horticultural Society of India