Tag Archives: Genetic advance

Variance, Heritability, Genetic Advance and Correlation of Some Phenological, Morphological and Productivity Traits in Some Safflower (Carthamus tinctorius L.) Genotypes

Mohammad Nael Khattab*(1)

(1). Crops Department, Faculty of Agriculture, Tishreen University, Latakia, Syria.

(*Corresponding author: Dr. Mohammad Nael Khattab. E-Mail:

Received: 11/03/2018                                Accepted: 06/10/2018

Abstract

In this study some of the phenological, morphological and productivity characteristics of six safflower (Carthamus tinctorius L.) genotypes (local, Thick orange 480 ،Acar 6، Syrian-1,  Gila and Son 11), were assessed using some genetic indicators (genetic and phenotypic variances, genotypic and phenotypic correlation coefficients, broad- sense heritability and genetic advance between seeds yield and its components) at  Dmsrkho site in Latakia governorate, during two seasons (2014/2015) and (2015/2016). Completely Randomized Design (CRD) was used with three replicates, to detect the genetic potentiality to be exploited to a maximum extent therefor, to determine the appropriate selectorial indices to improve safflower crop. Analysis of variance indicated that the genotypes differed significantly (P<0.05) for all studied characters, moreover, years effect and genotype by years interaction were significant for all studied traits. The values of mean and range revealed that there is wide variability among genotypes for most of the characters. The biological yield per plant, seed yield per plant, number of seeds per capitulum, number of capitulum per plant, number of branches per plant and harvest index exhibited wide range and high PCV and GCV giving an opportunity for improvement through election. Besides, these characters also had narrow differences between the values of PCV and GCV showing least influence of environment. High heritability coupled with high genetic advance observed for seed yield per plant, biological yield per plant, 100 seed weight, plant height and number of seeds per capitulum indicated that these traits are governed by additive gene action. Hence, there are good chances of improvement of these traits through direct selection. The highest phenotypic correlations were observed between seed yield with some traits such as: biological yield/plant and No. of capitula/plant, thus these traits, may be used for selecting high yielding genotypes.

Keywords: Safflower, Heritability, Genetic advance, Genetic variance, Phenotypic variance, Correlation coefficient.

Full paper in English: PDF

Variance, Heritability, Genetic Advance and Correlation Coefficient of Some Phenological, Morphological and Productivity Traits in Some Lentils (Lens culinaris M.) Genotypes

Mohammad Nael Khattab*(1)

(1). Crops Field Department, Faculty of Agriculture, Tishreen University, Latakia, Syria.

(*Corresponding author: Dr. Mohammad Nael Khattab. E-Mail: aboalabd876@gmail.com).

Received: 20/09/2017                              Accepted: 08/11/2017

Abstract
The phenological, morphological and productivity characteristics of six lentil genotypes (Idlib 1, Idlib 2, Idlib 3, Idlib 4, Balade and Kurdi) were assessed, using some genetic indicators (genetic and phenotypic variance, genotypic and phenotypic correlation coefficients, broad- sense heritability, and the genetic advance between seeds yield and its components at Dmsrkho area, in Latakia during two seasons (2014/2015) and (2015/2016). Randomized complete block design with three replicates was used, in order to investigate as much as possible, the genetic power of the genotypes to exploit them to the fullest extent and determine the appropriate selectorial evidence to improve lentils crop. Analysis of variance indicated that the genotypes differ significantly (P<0.05) for all studied characters. Moreover, years, genotype and years by genotypes interaction were significant for all studied traits. Phenotypic coefficient of variation was slightly higher than genetic coefficient of variation, and heritability values were high for most traits, this indicates the dominance of genetic factors and the low impact of environmental factors. Seed yield/plant (g) had a significant, positive genotypic and phenotypic correlation on number of pods/plant (rg=0.905** and rph=0.907**), while hundred seed weight (rg=0.294** and rph=0.294**) and biological yield (rg=0.76** and rph=0.78**). Biological yield had significant positive genotypic and phenotypic correlation with hundred seed weight (rg=0.62* and rph=0.59*) and seed yield (rg=0.93* and rph=0.95**). This indicates the possibility of selection for the biological yield through the selection of hundred seed weight and seed yield.

Keywords: Lentil, Heritability, Genetic advance, Genetic variance, Phenotypic variance, Correlation coefficient.

Full paper in English: PDF

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