Tag Archives: Soybean

Genetic Behavior for Some Productive and Qualitative Traits of Soybean Genotypes [Glycine max (L.) Merr.]

Ghrood Al Aswd*(1)  Ghassan AL Lahham(1)  and Saoud Shehab(1)

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

 (*Corresponding author: Dr. Ghrood Al Aswd. E-Mail: ghroodaswd@yahoo.com).

Received: 28/10/ 2015                                     Accepted: 02/12/ 2015

Abstract

The present investigation was conducted at the 1st May Station in General Commission for Scientific Agricultural Research (GCSAR), Syria, during two successive seasons 2011 and 2012. The main objective was to study both the general (GCA) and specific (SCA) combining abilities and mid and better-parents heterosis of days to flowering, 100 seeds weight, percent of oil, percent of protein and grain yield. Half diallel cross was employed in randomized complete blocks design with four replications. Results revealed the dominance of variances of specific combining ability of yield and 100 seeds weight, indicating the importance of non-additive gene action. Therefore, these traits were affected by the over-dominance gene effect, while the additive gene action was predominant for days to flowering, percent of oil and percent of protein, that means the last three characters were affected by partial-dominance gene effect. The hybrids Sb239×Sb308, Sb235×Sb305, Sb235×Sb298, Sb181×Sb305 and  Sb181×Sb235 showed a positive and significant heterosis values comparing with best parent for grain yield trait. Because of that they are subjected to the over dominance effect, and most of those hybrids owned significant and positive SCA, this is can be attributed to the strong genetic relationship between them, because their effect is related to the existence of dominance.

Keywords: Half- diallel cross, General and specific combining ability, Heterosis, Soybean.

Full paper in Arabic:

السلوكية الوراثية لبعض الصفات الإنتاجية والنوعية لطرز من فول الصويا  [.Glycine max (L.) Merr]

Estimation of Some Genetic Parameters and Heritability for Earliness and Seed Yield Traits in Soybean (Glycine max (L.) Merr.)

 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