GENETIC DIVERSITY STUDIES IN CULTIVATED TETRAPLOID COTTON
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Date
2021
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Department of Genetics and Plant Breeding B. A. College of Agriculture Anand Agricultural University Anand
Abstract
An experiment comprised of forty-five diverse accessions of G. hirsutum and
G. barbadense cotton was conducted in randomized complete block design with three
replications during Kharif - 2020 at Regional Research Station, Anand Agricultural
University, Anand to study the genetic variability, heritability, genetic advance,
correlation coefficient analysis, path coefficient analysis, genetic diversity and
selection indices. Each genotype was grown in a single row of 6.30 m length with a
spacing of 120 × 45 cm, inter row and intra row, respectively. Observations were
recorded on five randomly selected plants for seven qualitative characters viz., stem
hairiness, leaf shape, flower petal color, boll surface, boll shape, flower petal spot and
position of flower stigma and fifteen quantitative characters viz., days to 50%
flowering, days to 50% boll bursting, plant height (cm), monopodia per plant,
sympodia per plant, bolls per plant, boll weight (g), seed cotton yield per plant (g),
ginning percentage (%), seed index (g), lint index (g), oil content (%), span length
(mm), fibre strength (g/tex) and fibre fineness (mv). Whereas, days to 50% flowering
and days to 50% boll bursting was recorded on plot basis.