Genetic Variability and Heritability of Yield and Quality Traits in Cotton (G. hirsutum L.)

Genetic Variability and Heritability of Yield and Quality Traits in Cotton (G. hirsutum L.)

Jamila Dirbas*(1) and Ahmad Aljouma(1)

(1). Cotton Research Administration, General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria.

(*Corresponding author: Dr. Jamila Dirbas. E-mail: jamila.dirbas@gmail.com)

Received: 01/08/2021                                 Accepted: 24/08/2021

Abstract

Cotton in Syria is very important cash and industrial crop. Therefor the study endeavors to develop this crop via breeding programs and evaluation of genetic sources. In the present study, fifteen genotypes of cotton namely Fantom, Millinium, Lider, Cherpan432, Coker139, Aleppo 90, Aleppo124, Raqqa5, Aleppo118, Niab kiran, Niab 414, Deir EL-zour22, Coker 310, Samarkent 2, Tashkent 8) were evaluated for detecting genetic variability, heritability and genetic advance of twelve traits. The experiment was conducted at Hama Center of Scientific Agricultural Research, General Commission for Scientific Agricultural Research GCSAR/Syria, during 2019 season according to randomized complete block design RCBD with three replications. Analysis of variance showed high significant differences among the genotypes for all characters. Phenotypic coefficient of variation was higher than genotypic coefficient of variation for all traits, indicating environmental influence on these traits. The close agreement was found between phenotypic and genotypic coefficient of variances for no. of monopodia branch/ plant, earliness %, single plant yield, no. of symposia branch/ plant, fiber elongation, ginning out turn, fiber length and fiber strength indicating less environmental influence. High phenotypic and genotypic coefficients of variation estimates were obtained for no. of monopodia branch/ plant, earliness %, single plant yield and hence the best possibilities of improvements could be achieved by selection. High heritability coupled with high genetic advance were observed for single plant yield, fiber elongation and no. of bolls opened/plant, indicating additive gene effects. The quick improvement could well be expected in a short time for these characters by following simple pure line selection. Based on mean performance, the genotypes such as Aleppo118, Aleppo124 and Niab 414 recorded the highest mean values for single plant yield, no. of bolls opened/plant, and fiber elongation. So, they might be utilized as potential donors for breeding programs to improve a particular character in crop improvement.

Key words: Cotton, Genotypic Variation, Heritability, Genetic advance.

Full paper: PDF

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