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1. | | NAVIA, D.; CAMPANHONI, T.; CALVOSO-MIRANDA, L.; RODRIGUES, J. C. V.; TRINCADO, R.; FREITAS-ASTÚA, F.; NAVAJAS, M. Brevipalpus mites of economic and quarantine importance - integrating morphology and molecular information to advance their systematics. In:INTERNATIONAL CONGRESS OF ACAROLOGY, 13., 2010, Recife. Abstracts book... Recife: CNPq: FACEPE: Banco do Nordeste: TWAS, 2010. p. 173-174. Abstract 321 Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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Registro Completo
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
11/07/2018 |
Data da última atualização: |
22/01/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
HAILE, A.; HILALI, M.; HASSEN, H.; LOBO, R. N. B.; RISCHKOWSKY, B. |
Afiliação: |
Sustainable Intensification and Resilient Production Systems (SIRPS) Program, International Center for Agricultural Research in the Dry Areas (ICARDA) - Addis Ababa, Ethiopia; Sustainable Intensification and Resilient Production Systems (SIRPS) program, International Center for Agricultural Research in the Dry Areas (ICARDA) - Amman, Jordan; RAIMUNDO NONATO BRAGA LOBO, CNPC. |
Título: |
Estimates of genetic parameters and genetic trends for growth, reproduction, milk production and milk composition traits of Awassi sheep. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
Animal, v. 13, n. 2, p. 240?247, 2018. |
DOI: |
doi:10.1017/S1751731118001374 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: Genetic parameters and genetic trends for growth, reproduction, milk production and composition traits were estimated for Syrian (S) and Turkish (T) Awassi sheep and their crosses maintained at the International Center for Agricultural Research in the Dry Areas Tal Hadya station, Aleppo, Syria (now in Terbol station in Lebanon). The data were spread over 9 years. The individual breed additive effects of T were positive and significant (P<0.05) for birth weight (BW). However, the values for weaning weight (WW) and pre-weaning weight gain (WG) were negative, even though they were significant (P<0.05). These estimates were positive and significant (P<0.05) for all reproduction and milk traits, except for litter weight at birth (LWB). The additive contributions of T were 60.72±0.94 days, 1.643±0.359 kg, 13.09±0.89 days, 16.13±0.89 kg, 1.12±0.44 kg, 0.71±0.26 kg, 2.80±0.72 kg and 0.83±0.32 kg for lambing interval (LI), litter weight at weaning (LWW), lactation length, milk yield, fat yield, protein yield, total solids yield and lactose yield, respectively. The heterosis effects, both individual and maternal, were non-significant (P>0.05) for most growth traits. Crossing of T with S, however, resulted in desirable and significant (P<0.05) individual heterosis effects for all the reproduction, milk production and constituent yields. The heritability (h²) estimates, both direct and maternal, were low for BW, WW, WG and all reproductive traits indicating major influence of environmental factors, whereas milk yield and composition had medium values. Birth weight had moderate genetic correlation with WW and WG. The genetic correlation between WW and WG was high (0.724±0.951). Lambing interval had large negative genetic correlation with LWB and LWW. However, LI had medium significant correlations with all the milk production and composition traits. Larger litter weights at birth had high and negative influence on milk yield of the dam and its constituents. Genetic changes over years for all traits were non-significant. The lack of genetic change in the studied traits calls for systematic and organized selection scheme. MenosAbstract: Genetic parameters and genetic trends for growth, reproduction, milk production and composition traits were estimated for Syrian (S) and Turkish (T) Awassi sheep and their crosses maintained at the International Center for Agricultural Research in the Dry Areas Tal Hadya station, Aleppo, Syria (now in Terbol station in Lebanon). The data were spread over 9 years. The individual breed additive effects of T were positive and significant (P<0.05) for birth weight (BW). However, the values for weaning weight (WW) and pre-weaning weight gain (WG) were negative, even though they were significant (P<0.05). These estimates were positive and significant (P<0.05) for all reproduction and milk traits, except for litter weight at birth (LWB). The additive contributions of T were 60.72±0.94 days, 1.643±0.359 kg, 13.09±0.89 days, 16.13±0.89 kg, 1.12±0.44 kg, 0.71±0.26 kg, 2.80±0.72 kg and 0.83±0.32 kg for lambing interval (LI), litter weight at weaning (LWW), lactation length, milk yield, fat yield, protein yield, total solids yield and lactose yield, respectively. The heterosis effects, both individual and maternal, were non-significant (P>0.05) for most growth traits. Crossing of T with S, however, resulted in desirable and significant (P<0.05) individual heterosis effects for all the reproduction, milk production and constituent yields. The heritability (h²) estimates, both direct and maternal, were low for BW, WW, WG and all reproductive traits indicating major influence of ... Mostrar Tudo |
Palavras-Chave: |
BT; Lactation length. |
Thesagro: |
Cordeiro; Hereditariedade; Melhoramento Genético Animal; Ovino; Peso ao Nascer. |
Thesaurus NAL: |
Animal genetics; Birth weight; Environmental factors; Genetic improvement; Heritability; Lambs; Litter weight; Milk protein yield; Milk yield. |
Categoria do assunto: |
G Melhoramento Genético |
Marc: |
LEADER 03246naa a2200373 a 4500 001 2093200 005 2019-01-22 008 2018 bl uuuu u00u1 u #d 024 7 $adoi:10.1017/S1751731118001374$2DOI 100 1 $aHAILE, A. 245 $aEstimates of genetic parameters and genetic trends for growth, reproduction, milk production and milk composition traits of Awassi sheep.$h[electronic resource] 260 $c2018 520 $aAbstract: Genetic parameters and genetic trends for growth, reproduction, milk production and composition traits were estimated for Syrian (S) and Turkish (T) Awassi sheep and their crosses maintained at the International Center for Agricultural Research in the Dry Areas Tal Hadya station, Aleppo, Syria (now in Terbol station in Lebanon). The data were spread over 9 years. The individual breed additive effects of T were positive and significant (P<0.05) for birth weight (BW). However, the values for weaning weight (WW) and pre-weaning weight gain (WG) were negative, even though they were significant (P<0.05). These estimates were positive and significant (P<0.05) for all reproduction and milk traits, except for litter weight at birth (LWB). The additive contributions of T were 60.72±0.94 days, 1.643±0.359 kg, 13.09±0.89 days, 16.13±0.89 kg, 1.12±0.44 kg, 0.71±0.26 kg, 2.80±0.72 kg and 0.83±0.32 kg for lambing interval (LI), litter weight at weaning (LWW), lactation length, milk yield, fat yield, protein yield, total solids yield and lactose yield, respectively. The heterosis effects, both individual and maternal, were non-significant (P>0.05) for most growth traits. Crossing of T with S, however, resulted in desirable and significant (P<0.05) individual heterosis effects for all the reproduction, milk production and constituent yields. The heritability (h²) estimates, both direct and maternal, were low for BW, WW, WG and all reproductive traits indicating major influence of environmental factors, whereas milk yield and composition had medium values. Birth weight had moderate genetic correlation with WW and WG. The genetic correlation between WW and WG was high (0.724±0.951). Lambing interval had large negative genetic correlation with LWB and LWW. However, LI had medium significant correlations with all the milk production and composition traits. Larger litter weights at birth had high and negative influence on milk yield of the dam and its constituents. Genetic changes over years for all traits were non-significant. The lack of genetic change in the studied traits calls for systematic and organized selection scheme. 650 $aAnimal genetics 650 $aBirth weight 650 $aEnvironmental factors 650 $aGenetic improvement 650 $aHeritability 650 $aLambs 650 $aLitter weight 650 $aMilk protein yield 650 $aMilk yield 650 $aCordeiro 650 $aHereditariedade 650 $aMelhoramento Genético Animal 650 $aOvino 650 $aPeso ao Nascer 653 $aBT 653 $aLactation length 700 1 $aHILALI, M. 700 1 $aHASSEN, H. 700 1 $aLOBO, R. N. B. 700 1 $aRISCHKOWSKY, B. 773 $tAnimal$gv. 13, n. 2, p. 240?247, 2018.
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