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Variability studies in Amaranthus (Amaranthus spp.)

KrishiKosh

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Title Variability studies in Amaranthus (Amaranthus spp.)
 
Creator Panda, Roshan Kumar
 
Contributor Mishra, H.N.
 
Subject Variability studies, Amaranthus
 
Description Twelve diverse genotypes (germplasms) of Amaranthus were evaluated for genetic parameters taking 13 quantitative characters, maintained in All India Co-ordinated Research Project (AICRP) on Vegetable Crops, Bhubaneswar at Horticulture Research station, following Randomized Block Design having three replications during the kharif season 2014 (July-November).
A wide range of variation was observed for all the 13 characters under study. Genotypes such as 2012/AMVAR-4 (V4), BHIGARPUR LOCAL (V11) and 2012/AMVAR-2 (V2) were identified as ideal among the evaluated genotypes. Presence of minimum difference between phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) for all the characters indicated that the phenotypes represent true to the genotypes. High estimates of genotypic coefficient of variation (GCV), heritability and genetic advance as percentage of mean altogether at a glance were observed for the traits like number of inflorescence per plant, leaf: stem ratio, stem weight, yield per plant, leaf weight and plant height suggesting additive gene action for expression of these characters. Hence, these characters may be proved as effective criteria for selection to improve yield in Amaranthus. Correlation studies among the characters revealed that there is a strong inherent association between yield per plant (green yield) with characters like plant height, number of nodes per plant, stem girth, leaf length, leaf area, stem weight and leaf weight both at phenotypic and genotypic levels depicting that these are important correlated characters contributing towards yield (green yield). Path coefficient analysis (genotypic path) of various quantitative traits indicated that stem weight had the maximum positive direct effect followed by leaf weight, while, leaf: stem ratio exhibited the highest negative direct effect on yield of Amaranthus. With the help of D2 statistics and Tocher’s methods the genotypes were grouped into six clusters. Cluster II (two parents) and V (single parent) showed highest inter-cluster distances were the most divergent ones and hybridization involving parents from these two Clusters would be result oriented. Characters like yield per plant, leaf: stem ratio, leaf weight and stem weight predominantly contributed towards genetic divergence among the parents. So, selection of parents differing in these quantitative characters may be useful for developing hybrids in Amaranthus.
 
Date 2017-01-11T16:00:49Z
2017-01-11T16:00:49Z
2015
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/95717
 
Language en
 
Relation Th;4404