Tag Archives: Heritability

Variability, Correlation and Path Coefficient Analysis for ‎Agro-Morphological Traits in Lentil (Lens culinaris) ‎Genotypes

Dinesh Ghimire*(1) Aatish Gurung(1) Sushmita Kunwar(1) Archana Paudel(1) Rajendra Prasad Poudel(1) and Ganga Ram Kohar(2)

(1). Institute of Agriculture and Animal Sciences, Tribhuvan University, Paklihawa Campus,    Rupandehi, Nepal.

(2). Andhra University, Institute of Agriculture Sciences, Varanasi – 221 005, India.           

(*Corresponding author: Dinesh Ghimire. E-Mail: dineshghimire01@gmail.com).

Received: 19/04/2020                               Accepted: 13/05/2020

Abstract

Assessing variability and correlations for agro-morphological traits of lentil are the important aspects in the development of lentil varieties. Six lentil genotypes were evaluated in randomized complete block design (RCBD) with four replications at Agronomy Research Farm of Institute of Agriculture and Animal Science (IAAS), Paklihawa, Rupandehi, Nepal during winter season of 2018/19 to assess the genetic variability, heritability and genetic advance for agro-morphological traits. Analysis of variance revealed significant differences for all traits. The values of Phenotypic Coefficient of Variance (PCV) were higher than Genotypic Coefficient of Variance (GCV) for all the characters, and the number of pods per plant exhibited high estimates of both PCV and GCV indicating substantial scope of improvement through selection. The number of secondary branches showed the highest PCV (0.89) and GCV (0.50) whereas the lowest PCV (0.02) and GCV (0.00) were recorded for date to 50% maturity. High heritability (0.62) coupled with high genetic advance (192.63) as percent mean was observed for the grain yield. Grain yield showed positive and significant phenotypic correlation with number of pods per plant (r=0.424) and plant height (r=0.420). The highest positive direct effects were observed in plant height followed by number of grains per pods, number of secondary branches and number of pods per plant; suggesting the importance of these characters and the necessity of adopting them as selection criteria for grain yield improvement.

Key words: Lentil, Grain yield, Heritability, Correlation, Path analysis.

Full Paper in English: PDF

Determination of Genetic Persistency of Milk Production on Shami Goats under Semi-Intensive Rearing System

Hadil Obaid*(1) Kamel Fatal(2) Abd Al-Naser Al-Omar(3) and Emad Al-Masri(4)

(1). Hama Agricultural Research Center, General Commission for Scientific Agricultural Research (GSCAR), Damascus, Syria.

(2). Aleppo Agricultural Research Center, (GSCAR), Damascus, Syria.

(3). Animal Production Department, Faculty of Agricultural, Aleppo University, Aleppo, Syria.

(*Corresponding author: Eng. Hadil Obaid. E-Mail: hadilobaid2017@gmail.com).

Received: 10/02/2018                                Accepted: 04/04/2018

Abstract

The study was conducted on Shami goat herd using milk production seasons during the period (2013-2017) at Hama Research Center, General Commission for Scientific Agricultural Research (GCSAR). A total data of 471 milking records was analyzed to study the genetic persistency of milk production of Shami goats under semi-intensive rearing system, using subtraction between genetic estimation to produce 120 days from genetic estimation to produce first 60 days of milk season.The average of milk production for the first 60 days and 120 days of the milk were (70.61±20.80) and (120.69±0.45) kg respectively. The production of the year had a significant effect on milk production at 60 days, also parity had a significant effect on milk production at 120 days of lactation period (P<0.01). while there were no significant effects of parity and kidding type on milk production at 60 days. Also, no significant effects were noticed for year production and kidding type on milk production at 120 days (P>0.05). Heritability values of milk production at 60 and 120 days were (0.18) and (0.75) respectively. The values of genetic persistence of males at 60 and 120 days reached the peak of (+40.34) and the lowest of (-39.6) kg. So, these estimates can be used to increase the economic return and improve the goat flock for milk persistency. The research concluded the possibility of improving milk persistency genetically for female Shami goat.

Keyword: Genetic persistency, Milk production, Shami goats, Heritability.

Full paper in Arabic: PDF

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 Genetic Parameters of Some Productive Traits in Black Boni Sheep

Abed M. Al-Bial*(1) Ahmed Al-Dous(1)   Sharf Al-Azazy(1 ) and Abdulah Salah(1)

(1). The Regional Research Station in the Central Highlands, Agriculture Research & Extension Authority, Yemen
(*Corresponding author: Dr. Abed M. Al-Bial.  Email: aalbial@yahoo.com)

Received: 24/10/2016                                      Accepted: 09/01/2017

Abstract

In this study, the pedigree data, and production performance of 1074 records of Black Boni sheep were used. The sheep were kept at the Regional Research Station in the Central Highlands of Yemen, during the period 1992 to 2015, to estimate heritability, genetic and phenotypic correlations of some productive traits. The results showed that the general averages of birth weight, weaning weight, and daily gain from birth to weaning were 2.18 ± 0.011 kg, 10.64 ± 0.23 kg, and 93.71 ± 8.22 g/lamb, respectively. Estimated heritability values for birth weight, weaning weight, and daily gain were 0.38 ± 0.05, 0.30 ± 0.03 and 0.26 ± 0.1, respectively. Phenotypic and genetic correlations among studied traits were highly significant (P<0.01), and they ranged between 0.46 – 0.83 and 0.32 – 0.77, respectively. Therefore, it can be concluded that the use of genetic selection to improve any of the studied traits, will lead to an improvement in the other correlated traits.

Key words: Black Boni sheep, Genetic parameters, Heritability, Phenotypic and genetic correlations.

Full paper in Arabic: Estimation of Genetic Parameters of Some Productive Traits in Black Boni Sheep

The Effect of Some Genetic and Non-Genetic Factors on Birth Weight and Weaning in Syrian Calves Buffalo (Bubalus Bubalis)

Nader Drbas*(1) and Mohammed Ayman Daba(2)

(1). Shatha Research Station, Agriculturual Research Center in Al Ghab, General commission for Scientoific Agricultural Research (GCSAR), Al Ghab, Syria.
(2). Animal Breeding Research Department, Animal Wealth Research Administration, GCSAR, Damascus, Syria.

(*Corresponding author: Eng. Nader Drbas. E-Mail: n.drbas@gmail.com).

Received: 05/07/ 2015                                     Accepted: 21/08/ 2015

Abstract

The study was conducted at the Shatha Buffalo Research Station in Hama/Syria during 2011, to determine the effect of some factors affecting birth weight, weaning, and growth rate of born buffalo such as the father, season of birth and month of birth, sex and year of study.
The available station records were used for this purpose from 1997 up to 2008. The results showed a significant effect (p ≤ 0.01) for each of the year, season of birth, the father, and month of birth on birth weight, it was noticed that males were heavier than females at birth with a significant effect (p≤ 0.05), and weaning weight of 90 days influenced significantly (p≤ 0.01) by the year and month of birth, also the effects of father and sex were significant (p≤ 0.05), but no effect in terms of the number of the season. Considering the growth rate during breastfeeding period the impacts of year, father, and month of birth were significant (p≤ 0.01), also and the impact of sex was significant (p≤0.05), but no effect of the season number. The genetic heritability was estimated by the variance components of the parents, which was for birth weight 0.360 ± 0.03, and was for weaning weight 0.406 ± 0.06, while it was for growth rate 0.390 ± 0.02, this shows that there are several factors affect birth weight, and weaning, and growth rate in the Syrian calves buffalo during breastfeeding, therefore it is necessary to focus on improving the environment where the animal is besides the genetic improvement in breeding programs to get the required genetic gain.

Keywords: Buffalo, Birth weight, Weaning weight, Rate of daily growth, Heritability.

Full paper in Arabic:تأثير بعض العوامل الوراثية وغير الوراثية على وزن الميلاد والفطام في مواليد الجاموس السوري

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