Sheep Genetic Diversity and Breed Differences for Climate-Change Adaptation

Elbeltagy, Ahmed R.

doi:10.1007/978-981-10-4714-5_6

Cited by 4 publications

(1 citation statement)

References 54 publications

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“…The use of genomic tools in animal breeding is playing a crucial role in the genetic improvement of productive and adaptive traits of livestock (Elbeltagy, 2017). Using whole genome sequencing, several scholars have reported selection for adaptation traits in tropical livestock species (Kim et al, 2016;Kim et al, 2017;Taye et al, 2017).…”

Section: Genomic Tools and Transgenic Breedingmentioning

confidence: 99%

Biotechnological advances for climate change adaptation and mitigation in the case of goat production – A review

Tesema¹,

Ayiche²

2018

jaar

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Climate change influences goat production directly and indirectly thru its effect on reducing the quality and quantity of feed resources, and increasing spatial and temporal distribution of infectious diseases. The advances of biotechnology now a day’s opened an avenue to improve the nutritive value and digestibility of fibrous feeds by using biological methods (e.g., white rot fungi) and through recombinant DNA engineering techniques. Moreover, supplementation of probiotics, enzymes, antibiotics and organic acids modulate the activities and composition of the rumen microbial ecosystem thereby reduce lactic acid content, improve nutrient digestibility, reduce methanogenesis, optimize voluntary fatty acid profiles, and decrease ruminal ammonia production and protein degradation. All these effects increase productive performances and reduce methane emission from goat production. Genetic engineering and introgression of genes between adapted and non-adapted populations have been used to improve the diseases resistance of goat. Vaccines are used to control infectious diseases, increase productivity by modulating hormones or the immune system functions. Immuno-castration and ectoparasite control are also important biotechnological tools. Immunological and molecular techniques diagnostic technologies (PCR, RT-PCR, microarray, proteomic technique, biosensors, fluorescent-in-situ-hybridisation (FISH) and nanotechnologies) are used to detect and identify diseases and their causal agents. However, the aforementioned biotechnological tools are not yet well developed in developing countries like Ethiopia. Therefore, review, evaluation, and implementation of biotechnological tools in goat production in developing countries is paramount to increase production and productivity, and realize the potential use of biotechnology for climate change adaptation and mitigation.

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Section: Genomic Tools and Transgenic Breedingmentioning

confidence: 99%

Biotechnological advances for climate change adaptation and mitigation in the case of goat production – A review

Tesema¹,

Ayiche²

2018

jaar

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Efficiency of Growing Meat-Wool Fields Depending on the Tonnage of Wool

Mykytyuk,

Begma,

Mokdat Sanaa

2024

Anim. Breed. and Genet.

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In the article, based on the conducted research, considers the expediency of using wool fineness indicators in the selection process when growing meat-wool breeds. Due to the lack of a comparative analysis of animal husbandry, experimental groups were formed conditionally and distributed according to the total number of herds. The first group of experimental animals included yaks with the thickness of wool fibers – 23.1–25.0 μm or 60th quality; to the II group with an average fiber diameter of 25.1–27.0 μm or 58th good quality;The III group consisted of ditches with a greater thickness of wool fibers – 27.1–29.0 μm or 56th good quality. In order to study the effectiveness of using fodder in production, three model groups of 10 head each at the age of 12 months were formed. It was established that during the 60-day growing period, the indicators of absolute, average daily and relative growth in pits of II and III groups were higher. Feed costs per 1 kg of body weight gain amounted to 11.4 units in the first group and 1282 g of digestible protein, in the II and III groups, respectively, 10.3 units. and 1166 g and 10.4 k. units. and 1169 g of digestible protein. Conducted studies have shown that the yaks with the tone of wool of the 56th quality are characterized by higher indicators in terms of live weight, development and wool productivity, which indicates their better adaptation to the natural and climatic conditions in which the farm is located.

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Productive traits of sheep of different genotypes

Лихач

Kalinichenko

2019

Tehnologìâ virobnictva ì pererobki produktìv tvarinnictva

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The effect of industrial crossbreeding on the productive qualities of purebred Tsigai and Romanov sheep breeds was investigated. The following indicators were studied: the survival of the young for the period from birth to their weaning; dynamics of live weight of sheep and goats in the corresponding age periods (at birth, at 2-, 4-, 6,5-month age); meat productivity; wool productivity and sheepskin quality. The lambs and suckers were found to have live weight at birth of 3.9 and 4.2 kg respectively, which is 8.3 and 7.6 % higher than in purebred lambs. The difference in live weight of local and purebred lambs is statistically significant (P>0,999).The average daily growth for the whole period in the local sheep was 192 g, in the fossa 171 g, which is 4.3 and 4.9 % respectively more than in purebred peers. It is proved that the local young is characterized by better viability: the preservation of lambs to beating was 132.2 % against 115.3 % in purebreds. It was studied that the mass of chilled carcass in purebred lambs was 14.14 kg, and in domestic 14.3% more (P>0,999). It was investigated that animals in the experimental group had an average of 12.49 kg of flesh in the carcass, which is 77.3 % by weight of the carcass. In purebred lambs these figures are respectively 10.52 kg or 74.4 %. The difference in the pulp mass between the carcasses of the study groups was 1.97 kg or 18.7% (P>0.999). The fat content of the mixture was superior to pure-bred animals, resulting in a higher calorie content of 8.34 %. Proven lambs during fattening were shown to have a greater increase in live weight compared to purebred by 13.6%. At the same time, they consumed less feed units by 4.7 %. In terms of the original dirty wool, the highest indices were in the local brightnesses. Along with this, they also outperformed purebred animals by 2.48 kg, or 10.7%. It should be noted that in Romanov sheep, as a rule, fluff is exaggerated. This trend is preserved in the received mixes. The difference in the length of the down and the bones was 32.2 % (P>0,999). It is noted that the area of sheep sheep of the experimental group was more control by 7.4 % (P>0.95) and amounted to 84.0 dm2. The same pattern was observed in the area of exposed sheepskin. Key words: wool, lamb, sheepskin, live weight, viability, lambs, Romanov breed, Tsigai breed.

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Sheep Genetic Diversity and Breed Differences for Climate-Change Adaptation

Cited by 4 publications

References 54 publications

Biotechnological advances for climate change adaptation and mitigation in the case of goat production – A review

Biotechnological advances for climate change adaptation and mitigation in the case of goat production – A review

Efficiency of Growing Meat-Wool Fields Depending on the Tonnage of Wool

Productive traits of sheep of different genotypes

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