Ghrood Al-Aswd *(1) Mahmud Sabbouh(2)Waleed Alek(3) and Samir AL-Ahmad (4)
(1). General Commission for Scientific Agricultural Research (GCSAR), Crops Research Administration, Damascus, Syria.
(2). Agronomy Department, Faculty of Agriculture, Damascus University, Damascus, Syria.
(3). (GCSAR), Crops Research Administration, Damascus, Syria.
(4). (GCSAR), Tartos Agricultural Research Center, Tartos , Syria.
(*Corresponding author: Ghrood Al-Aswd: General Commission for Scientific Agricultural Research (GCSAR), Crops Research Administration, Damascus, Syria. E-mail: ghroodaswd@yahoo.com).
Received: 14/07/ 2014 Accepted: 19/2/ 2015
Abstract
The present study was undertaken at May First Station in (GCSAR), Damascus, Syria, during 2011 and 2012 seasons, to estimate the gene action, heritability, genotypic and phenotypic coefficient variation of five population seeds of two single crosses (Sb181 × Sb235, Sb235 × Sb298). The crosses were grown in a randomized complete block design with three replications to evaluate the number of days to flowering, number of days to initiation of first pod, number of days to physiological maturity, number of days to full maturity and seed yield traits. The mean square analysis showed significant differences between the five populations for all studied traits in all crosses. The cross Sb235 × Sb298 achieved the highest heritability in broad and narrow senses (92% and 46%) respectively, for number of days to physiological maturity, while the highest value of phenotypic and genotypic variations (15.29 and12.80) respectively, were achieved for seed yield in the cross Sb181 × Sb235, but the highest value of genetic advance for that cross was 10.08%. The epistasis or dominance gene action controlled the inheritance of the most traits, this leads to the importance of selection in late generations to improve those traits, because of the high value of heritability, and low to moderate genetic advance in the two crosses.
Keywords: Soybean, Gene action, Phenotypic and genotypic variations, Heritability, Genetic advance
Full paper in Arabic : تقدير بعض المؤشرات الوراثية ودرجة التوريث لصفات التبكير وغلة البذور في فول الصويا