GENETIC DIVERSITY STUDIES AMONG UPLAND COTTON FOR MOROPHO-QUALITATIVE TRAITS

V.V. UJJAINKAR¹*, V.D. PATIL^2
1Department of Agricultural Botany, College of Agriculture, Dr Panjabrao Deshmukh Krishi Vidyappeth, Akola, 444 104, Maharashtra, India
²Ex. Dean, Faculty of Agriculture, Dr Panjabrao Deshmukh Krishi Vidyappeth, Akola, 444 104, Maharashtra, India
* Corresponding Author : vvujjainkar@gmail.com

Received : 03-06-2020     Accepted : 25-06-2020     Published : 30-06-2020
Volume : 12     Issue : 12       Pages : 9991 - 9994
Int J Agr Sci 12.12 (2020):9991-9994

Keywords : Cotton, Genetic Divergence, D2 Analysis, Clustering, G. hirsutum L
Academic Editor : Ammayappan L., Dr Zheko Radev
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to research facilities and support provided by the Senior Research Scientist, (AICRP on Cotton), Cotton Research Unit and Department of Agricultural Botany, College of Agriculture, Dr Panjabrao Deshmukh Krishi Vidyappeth, Akola, 444 104, Maharashtra, India
Author Contribution : All authors equally contributed

The present investigation was conducted with the experimental material comprising of thirty-four genetically diverse and elite upland cotton lines collected from eleven locations of all over India. Data were collected by randomly selected sample plants per plot basis for important morpho-qualitative traits viz., days to 50 percent flowering, plant height (cm), number of monopodia per plant, number of sympodia per plant, number of bolls per plant, boll weight (g), number of seeds per boll, ginning outturn (%), seed index (g), lint index (%), 2.5% span length, fibre strength (g/tex), micronaire value (?g/inch) and seed cotton yield per plant (g). The data obtained from the field experiment is subjected to the analysis of variance for various quantitative traits under study, which revealed the highly significant differences among the genotypes for all the fourteen traits under study indicating substantial genetic variability. The simultaneous test of significance based on Wilk’s Criteria for the pooled effect of all the fourteen characters studied has shown highly significant differences among the thirty-four genotypes (x2=1869.8080 at 462 d.f.). Therefore, D2 values corresponding to 561 possible combinations among thirty-four genotypes found statistically significant. Analysis of variance revealed the significant differences among the thirty-four genotypes for all the traits studied, indicating the existence of considerable amount of genetic variability among them. On the basis of D2 values for 561 possible pairs of the population of thirty-four genotypes were grouped into seven clusters, indicating the satisfactory magnitude of diversity in the genotypes. The selection of diverse parents belonging to diverse clusters for crossing programme for their exploitation to obtain the set of desirable segregants.

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