Abounagua, A.

Atti, N.

Douhard, F.

González García, E.

Hazard, D.

Joy Torrens, Margalida

Lobón Ascaso, Sandra

Salah, E.

Smeti, S.

Yagoubi, Y.

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EAAP – 73rd Annual Meeting, Porto, Portugal, 2022 679Session 68 Poster 15Session 68 Poster 14Adaptive capacity of Mediterranean sheep over morphological traits at different physiological statusN. Atti1, S. Lobón2, A. Abounagua3, D. Hazard4, Y. Yagoubi1, M. Joy2, E. Salah3, F. Douhard4, S. Smeti1 and E. Gonzalez-Garcia41INRAT, rue Hedi Karray Ariana, 2083, Tunisia, 2CITA, Montañana, Zaragoza, 930, Spain, 3APRI, Dokki, Giza, 72934, Egypt, 4INRAE, SupAgro Montpellier, Place Pierre Viala, 34060, France; slobon@cita-aragon.esSmall ruminants represent a major livestock resource throughout the Mediterranean area. However, most of them are raised under low nutritional quantitative and qualitative inputs. In such conditions, the use of animal’s body reserves (BR) is inevitable to cover their energy requirements. In this context, we studied, in the Adapt-Herd PRIMA Project, the productive performance of some Mediterranean sheep breeds from France, Egypt, Spain, and Tunisia. For this, and during two years, the body weight (BW) and body condition score (BCS) of ewes were recorded at different physiological stages (mating, middle and late pregnancy, lambing, during suckling and lamb’s weaning). The intra and inter flock’s variabilities in BW and BCS and related reproductive and productive parameters were recorded. A direct relationship between reproduction performance and ewes’ BW, BCS was confirmed in Egyptian, French and Tunisian breeds. During pregnancy all flocks decreased the BCS, showing BR mobilization since mid-pregnancy. The decrease was more noticeable for Tunisian and Egyptian ewes, to face shortage nutrition during pregnancy which occurred in summer, and French Romane breed when ewes are reared on Mediterranean rangeland. All ewes mobilized their BR from late pregnancy to the end of suckling periods, to cover the lamb growth’s requirements. However, when the lambs were weaned and/or their nutritional condition was improved, ewes were able to restore BRs, reaching higher BW and BCS. The lambs’ BW at birth was affected by the prolificacy (single > twins > triple litters) for all breeds. During suckling, the growth rate was similar regardless the birth mode, which may be partially explained by high nutritional supply for the breeds with high prolificacy and the low prolificacy for other breeds. In conclusion, we confirm the essential role of BR mobilization and accretion in the expression of adaptive capacities in the current context of climate change in the Mediterranean region.Citrullination gene related detections by runs of homozigosity and resilience in sheepL. Menegatto1, L. Freitas1, K. Costa2, N. Stafuzza2 and C. Paz21University of São Paulo, Department of Genetics, Ribeirão Preto Medical School, Bandeirantes Avenue, 3900, 14048900, Brazil, 2Animal Science Institute, Carlos Tonani Higway, km 90, 14174000, Brazil; leonardomenegatto@gmail.comCitrullination is a common process to occur by antibodies and many studies reported important genes like PADI4, which is particularly involved in citrullination catabolism to initiate extracellular neutrophil traps. We hypothesized that this process could present relationship with other genes besides only the resistance to hematophagous gastrointestinal nematodes, but also with resilience to these warms, considering that resilience trait is defined as a situation with high infection but without animal anaemia. We genotyped 497 Santa Inês sheep with Ovine SNP50 Genotyping BeadChip and we had clustered resilient animals with BLUPF90 by faecal egg count, corpuscular volume, eye colour chart, and total plasma protein parameters with repeated measurements over time, and pedigree information. After quality control with PreGSF90, we employed the runs homozigosity (ROHs) detection with PLINK and detectRUNS R package, and then we identified genes and its description by NCBI, considering shared results from PADI3, PADI4 and PADI6 genes with other important haplotypes. We detected 17 ROHs, with 2,861,053 b in average, identifying 14 regions which contains 319 genes, including a bitter taste detection (TAS) gene, whose process was associated with diversified diet, toxin neutralization, and immune system, beyond its description as wild gene introgressions which confer intoxication protection in European sheep. It was also identified thyroid oxidase gene (TPO), which action with innate system and neutrophils, macrophages, NK and dendritic cells; apolipoproteins (APO) genes, involved in cholesterol biosynthesis and its relationship with inflammation and innate immune system; and RNF186 gene, which is associated with intestinal permeability and inflammation. The results demonstrates that some haplotypes are potentially conserved since domestication or European past evolution, as an adaptation to new environments sheep colonization, and they are possible related with other resilient functions in a coordinated immunological response.Book of Abstracts of the 73rd Annual Meeting of the European Federation of Animal ScienceBook of abstracts No. 28 (2022) Porto, Portugal5 – 9 September, 2022

Adaptive capacity of Mediterranean sheep over morphological traits at different physiological status (póster)

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Adaptive capacity of Mediterranean sheep over morphological traits at different physiological status (póster)

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