Manal Madarati *(1) Mohammad Jamal Hamandosh(2)and Ahmad Aljouma (1)
(1). Cotton Research Department, General Commission for Scientifc Agricultural Research (GCSAR), Damascus, Syria.
(2). Department of Crops, Faculty of Agriculture Aleppo University, Syria.
(*Corresponding author: Manal Madarati. Email: manalmadarati7@gmail.com)
Received: 20/05/2022 Accepted: 4/06/2022
Abstract:
The experiment was conducted at Tal Hadya station in Aleppo, Cotton Research Department, during 2021 season. Sixteen genotypes were used with three replications under RCBD design. The aim of the research was to study the phenotypic, genetic and environmental variability, heritability, correlations. Genotypes were evaluated for early indicators and productive traits. The results showed a large variability within studied traits. The genetic and phenotypic variances were larger than environmental variance for all studies traits. The highest value of heritability was 98.95% for number of days to 50% flowering and high genetic advance 28.25. The results showed a very high positive significant correlation between earliness index and each of combined picking and day CPD and average boll weight. And between CPD index and each of sympodia branches number and average boll weight. There’s also a positive significant correlation between earliness index and each of CPD index and sympodia and total boll number. The genotypes 6, 3, 11, and 8 were the most early genotypes studied.
Key words : earliness indicators, Genotypes, cotton, genetic variation components, correlations.
Full paper in Arabic: pdf