Energy and protein requirements of Santa Ines lambs, a breed of hair sheep

The aim of this study was to estimate the energy and protein requirements for maintenance and growth of lambs. A total of 35 crossbreed Dorper × Santa Ines lambs [31 ± 1.28 kg of initial body weight (BW) and 4 months old] were distributed in a completely randomized design with three treatments groups (ad libitum, 30 and 60% of feed restriction). Five lambs were slaughtered at the beginning of the experimental trial as a reference group to estimate the initial empty BW (EBW) and body composition. When the animals of the ad libitum treatment reached a BW average of 47.2 kg, at day 84 of trial, all lambs were slaughtered. The feed restriction promoted reduction in body fat (P < 0.001) and energy concentration (P < 0.001), while protein showed a quadratic response (P = 0.05). The equations obtained for NEg and NPg requirements were 0.2984 × EBW0.75 × EBWG0.8069 and 248.617 × EBW−0.15546, respectively. The net energy (NEm) and protein (NPm) for maintenance were 71.00 kcal/kg EBW0.75/day and 1.76 g/kg EBW0.75/day, respectively. In conclusion, the NEg and NPg requirement for lambs with 30 kg of BW and 200 g of average daily gain (ADG) were 0.736 Mcal/day and 24.38 g/day, respectively. Our findings indicate that the NEm for crossbreed Dorper × Santa Ines lambs is similar to those recommended by the international committees; however, we support the hypothesis that the requirements for gain are lower.

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Reproductive and productive characteristics of hair sheep raised in the tropical region grassland of Brazil

Research Society and Development ◽

10.33448/rsd-v9i9.7287 ◽

2020 ◽

Vol 9 (9) ◽

pp. e331997287

Author(s):

Jardeson de Souza Pinheiro ◽

Paloma Eleutério ◽

Samuel Pinho Silva ◽

Caio Júlio Lima Herbster ◽

Judite Antunes Cipriano ◽

...

Keyword(s):

Body Weight ◽

Coat Color ◽

Tropical Climate ◽

Ovis Aries ◽

Genetic Group ◽

Reproductive Efficiency ◽

Tropical Region ◽

Hair Sheep ◽

Tropical Conditions ◽

Santa Inês

We aimed to characterize the energetic profile of hair sheep (Ovis aries) raised on pasture in a tropical climate country and verify it is influence on productive and reproductive parameters. A total of 68 non-pregnant adult ewes were randomly distributed into four genetic groups (GGs) according to coat color (Red-coated Santa Inês GG – 17, Black-coated Santa Inês GG – 13, White-coated Morada Nova GG – 28 and Red-coated Morada Nova GG – 10). We collected blood samples at the beginning and at the end of the breeding season. The reproductive efficiency of the ewes was evaluated by fertility, prolificacy, lamb survival rate, and lamb body weight at birth and weaning. We performed statistical analyses using the package PROC GLM and the chi-square (χ2) test from SAS software. The genetic group influenced serum glucose and β-hydroxybutyrate concentrations, prolificacy, and lamb body weight. Male lambs were heavier than female lambs at birth and weaning. Twin lambs were lighter at birth and at weaning than were single lambs. The genetic group, lamb birth rank, and sex influenced the lamb body weight at birth and weaning. This study presents important information on the reproductive efficiency of these hair sheep that are relevant to tropical climate countries. The blood parameters found in this research show that there are important metabolic differences between hair sheep in the semi-arid region of Northeast Brazil. Morada Nova sheep with independent white coat color, higher reproductive performance in tropical conditions.

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How to better conserve with genetic data: origin and population structure of Brazilian locally adapted hair sheep (Ovis aries) breeds

10.1101/815217 ◽

2019 ◽

Author(s):

Tiago do Prado Paim ◽

Samuel Rezende Paiva ◽

Natália Martins de Toledo ◽

Michel Beleza Yamaghishi ◽

Paulo Luiz Souza Carneiro ◽

...

Keyword(s):

Genetic Diversity ◽

Population Structure ◽

Genetic Resources ◽

Strong Relationship ◽

Ovis Aries ◽

East African ◽

Hair Sheep ◽

Sheep Breeds ◽

Fat Tail ◽

Santa Inês

AbstractBrazilian hair sheep constitute a genetic diversity hotspot of sheep breeds. These locally adapted genetic resources developed in harsh environments of the Brazilian Northwest (semi-arid) and maintained important traits for this region, such as parasite resistance, heat tolerance and high pelt quality. Genotypes (50K SNP chip) from seven Brazilian sheep breeds (5 hair and 2 coarse wool types) and 87 worldwide breeds were used to verify population structure, admixture and genetic diversity, using PCA and ADMIXTURE analyses. We constructed a phylogenetic tree and evaluated migration events between genetic groups using TREEMIX software. Brazilian Somali, a fat-tailed breed, was the unique breed with high relationship with East African breeds and formed a distinct cluster from other Brazilian breeds. This breed seems to contribute to formation of Santa Inês, Morada Nova and Brazilian Fat-tail breeds. Brazilian Blackbelly had a clear relationship with Barbados Blackbelly, which appeared as another group. Other Brazilian breeds seem to form a further genetic group with some recent admixtures. Morada Nova remained as a separate group, not showing a strong relationship with European or African breeds, only revealing a migration event from Sidaoun, an Algerian hair breed. Brazilian Fat-tail and Morada Nova share a common ancestor, but the first received introgressions from Brazilian Somali and Afrikaner breeds, explaining the fat-tail phenotype. Santa Inês received strong contribution from Bergamasca and had an admixed origin with recent introgressions from other breeds, mainly from Suffolk animals. In conclusion, Brazilian Somali and Brazilian Fat-tail are the most endangered sheep genetic resources in Brazil.

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Contributions of the hair sheep breed Santa Ines as a maintenance host for Rhipicephalus ( Boophilus ) microplus (Acari: Ixodidae) in Brazil

Parasites & Vectors ◽

10.1186/preaccept-1451455905133272 ◽

2014 ◽

Vol 7 (1) ◽

pp. 515

Author(s):

Marcos Garcia ◽

Renato Andreotti ◽

Fernando Reis ◽

André Aguirre ◽

Jacqueline Barros ◽

...

Keyword(s):

Boophilus Microplus ◽

Sheep Breed ◽

Hair Sheep ◽

Santa Inês

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Pemphigus foliaceus in a sheep

Semina Ciências Agrárias ◽

10.5433/1679-0359.2019v40n2p993 ◽

2019 ◽

Vol 40 (2) ◽

pp. 1001

Author(s):

Aline Antas Cordeiro Cavalcanti ◽

Ana Claudia Campos ◽

Aline Guedes Mamede Moraes ◽

Clarice Ricardo de Macêdo Pessoa ◽

Franklin Riet-Correa ◽

...

Keyword(s):

Case Report ◽

Autoimmune Disease ◽

Domestic Animals ◽

Eosinophilic Infiltration ◽

Pemphigus Foliaceus ◽

Hair Sheep ◽

First Case ◽

Santa Inês ◽

Microscopic Findings

Pemphigus foliaceus (PF) is an autoimmune disease of the skin and is the most common form of pemphigus in domestic animals. This work reports a case of pemphigus foliaceus in a Santa Inês hair sheep. The ewe presented with multifocal bilateral crusted alopecic dermatitis affecting the chest, abdomen, and pelvic and thoracic limbs. Parakeratotic hyperkeratosis and acanthosis, in addition to subcorneal pustules, were observed histologically, and acantholytic cells and neutrophils were observed within the pustules. In the superficial and deep dermal tissues, there was intense eosinophilic infiltration and the presence of rare macrophages. These microscopic findings were characteristic of PF, and treatment with dexamethasone was ineffective. This disease is rare in sheep, and this is the first case report to be published in Brazil.

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Contributions of the hair sheep breed Santa Ines as a maintenance host for Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) in Brazil

Parasites & Vectors ◽

10.1186/s13071-014-0515-5 ◽

2014 ◽

Vol 7 (1) ◽

Cited By ~ 1

Author(s):

Marcos Valério Garcia ◽

Renato Andreotti ◽

Fernando Alvarenga Reis ◽

André de Abreu Rangel Aguirre ◽

Jacqueline Cavalcante Barros ◽

...

Keyword(s):

Boophilus Microplus ◽

Sheep Breed ◽

Hair Sheep ◽

Santa Inês

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Genetic variability of the Brazilian hair sheep breeds

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2005000900008 ◽

2005 ◽

Vol 40 (9) ◽

pp. 887-893 ◽

Cited By ~ 36

Author(s):

Samuel Rezende Paiva ◽

Vanessa Chaves Silvério ◽

Andréa Alves Egito ◽

Concepta McManus ◽

Danielle Assis de Faria ◽

...

Keyword(s):

Molecular Similarity ◽

Federal District ◽

Randomly Amplified Polymorphic Dna ◽

Conservation Unit ◽

Hair Sheep ◽

Chain Reaction ◽

Sheep Breeds ◽

Polymerase Chain ◽

Santa Inês ◽

Management And Conservation

The objectives of this work were to investigate the genetic structure of the Brazilian hair sheep breeds and to determine the origin of the Santa Inês breed. Molecular similarity was determined using Randomly Amplified Polymorphic DNA - Polymerase Chain Reaction markers in 238 individuals from five naturalized sheep breeds: Santa Inês (48 animals), Rabo Largo (48), Somali (48), Morada Nova (48) and Bergamasca (46), collected in Goiás, Sergipe, Bahia, and Ceará States as well as in the Federal District. Fifty-four loci were selected from 19 primers, after a pilot test using 140 primers. Qualitative analyses indicate diagnostic markers for all breeds. All breeds were significantly different from each other. Interbreed differences were explained by 14.92% of the total variation. Santa Inês clustered with Bergamasca (97% bootstrap) and with Rabo Largo, composing the third member of the group (81% bootstrap) while Morada Nova and Somali breeds clustered separately. Each breed should be considered as a separate management and conservation unit, and special care should be taken with Rabo Largo, Morada Nova and Somali breeds, represented by small herds in Brazil.

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