Specific Genes Affecting Body Weight in Iraqi Awassi Sheep

Al-Barzinji, Yousif; AMEEN, ASO

doi:10.26682/cajuod.2020.22.2.21

Cited by 2 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While we find that the ewes of the second birth sequence had a significant (P≤0.01) superiority in the characteristic of chest width by 17.36 cm over the other sequences of the same trait, and the table shows high significant differences (P≤0.01) in relation to the chest circumference, as it was higher in ewes that had four Births at an average of (78 cm). The regression coefficient of the studied traits on body weight Table (10) shows the value of the regression coefficient for the traits under study, represented by body dimensions over the weight of the animal when studied, where the regression coefficient values for all traits on animal weight were not significant, except for the value of the regression of the back height on the weight of the animal, it had a significant superiority (P≤0.05) and amounted to 0.40 kg. Thus, we expect an increase in the posterior height of the body by 0.40 cm when the animal's weight increases by one kilogram.…”

Section: Resultsmentioning

confidence: 99%

“…It is useful to measure the dimensions of the animal's body in predicting some productive traits such as live body weight during fattening periods, as well as determining which periods are suitable for fattening [7,8,9]. There are many scientific studies that talked about the relationship between the DRB1 gene and the weight and size of farm animals and physical dimensions, a study was conducted to investigate the effect of some specific genes on body weight in Iraqi Awassi sheep, by using the PCR-RFLP technique, the result was that lambs with CC genotype of the MHC-DRB1 locus, it was significantly superior in body weight and at all ages, except for body weight at birth [10]. The difference in the genotypes of the DRB1 gene gave highly significant superiority in growth traits, including body weight and early age in lambs [11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Relationship Between Genotype of DRB1 Gene and some Performance Traits of Iraqi Sheep

Al-Qargouli,

Salim

2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

The experiment was conducted at the Sheep and Goat Research Station in Al-Shatrah district located in the north of Thi Qar Governorate, Thi Qar Agriculture Directorate, Ministry of Agriculture, Marshlands Research Center, Thi Qar University. It included 59 animals from the ewes of Iraqi sheep (Awassi), to study the relationship between the genotype of the DRB1 gene and some performance traits in Iraqi sheep, where the study included taking some measurements of body dimensions, taking blood samples for the purpose of laboratory examination of the study, included extraction of genetic material and genetic analysis, using PCR technology at the Marshes Research Center at Thi Qar University. The results of the analysis of the nucleotide sequence sequence of the studied genetic segment of the DRB1 gene showed that the mutation T>G.245 was present in the coding regions of the DRB1 gene, occurred in GTT coding for Valine (V) and changed to GGT coding for the amino acid Glycine (G), located at position (82) in the amino acid sequence of the DRB1 gene, this mutation was located in the region of the second exon, where this mutation was considered a missense mutation. It has three genotypes: TT, TG, and GG, by calculating the allelic frequency, there was a highly significant superiority of the T allele (0.53) over the G allele (0.47) in the T>G mutation.245, the genotypes of the mutation T>G.245 of the DRB1 gene, it was found that there were highly significant differences (P≤0.01) in all characteristics under study, such as birth weight and body dimensions, it was found that the effect of some non-genetic factors on the studied traits, namely, the state of pregnancy, the age of the ewes, and the sequence of childbirth, was highly significant (P≤0.01) in all characteristics of the animal’s body dimensions, except for the width of the breast, it was observed that ewes aged 3-4 years outperformed the rest of the ewes compared to other age groups, was the lowest in sheep less than a year old in all traits under study, the regression coefficient of the characteristics of body dimensions on the weight of the animal were not significant except for the regression coefficient of the rear height of the animal on the weight of the animal. All characteristics of body dimensions (body length, frontal height, posterior height, chest width, and chest circumference) showed a highly significant correlation (P≤0.01), positive and high.

show abstract

Section: Resultsmentioning

confidence: 99%