Genetic divergence analysis for morphological and biochemical traits in Desi cotton (Gossypium arboreum L.)
Loading...
Date
2019
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
CCSHAU
Abstract
The present investigation entitled “Genetic divergence analysis for morphological and
biochemical traits in Desi cotton (Gossypium arboreum L.)” was carried out at the Research area of
Cotton Section and Biochemistry Laboratory, Department of Genetics and Plant Breeding, CCS Haryana
Agricultural University, Hisar (Haryana, India) during Kharif 2017-18. The observations were recorded
for different quantitative and biochemical characters to assess the genetic diversity in 60 Desi cotton
genotypes. The GCV and PCV were observed high for seed cotton yield /plant, plant height (cm), number
of bolls /plant, lint yield /plant (g), and protein content (%). High heritability was observed for almost all
the characters studied except number of monopods /plant. The highest genetic advance as percent of mean
was recorded for traits like lint yield /plant (g), seed cotton yield /plant and gossypol content (%). Hence,
on the basis of highest value for component of variation and variability parameter direct selection for traits
would be most effective. Seed cotton yield /plant had a positive and highly significant correlation with
trait like number of monopods /plant, number of bolls /plant, boll weight (g), lint yield /plant (g), seed
index and lint index at genotypic level indicated that there was strong inherent association between these
traits. On the basis of cluster analysis sixty Desi cotton genotypes were grouped into seven clusters,
indicated the presence of substantial genetic diversity in the evaluated germplasm lines/genotypes. In this
context, the highest intra-cluster distance was observed in cluster V and lowest in cluster II. The
maximum inter-cluster distance were showed between clusters II and IV, whereas, the minimum inter
cluster distance was noticed between cluster III and VII, followed by clusters I and II. The genotypes of
cluster III viz; FFS-1, Garovilli, H 476-5, HD 10, HD 3 and HD 20 were best performing. Based on study
of morphological genetic diversity, the genotypes viz., BH 92, DC-93, HD 5278, FFS-9, BH 102, AC 33,
HD 351, HD 372, BH 41, N-W-1, HD 392, G 20 and G 23 showed sufficient amount of genetic diversity
for yield and its component traits which may be used in cotton breeding programmes for further
improvement.
Description
Keywords
null