Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
09/07/1999 |
Data da última atualização: |
03/01/2024 |
Autoria: |
MANDONNET, N.; AUMONT, G.; FLEURY, J.; GRUNER, L.; BOUIX, J.; VU TIEN KHANG, J. |
Título: |
Genetic variability in resistance of Creole goats to natural infection with trichostrongylids in Guadeloupe. |
Ano de publicação: |
1996 |
Fonte/Imprenta: |
Annals of the New York Academy of Sciences, v. 791, n. 1, p. 421-431, Jul. 1996. |
DOI: |
10.1111/j.1749-6632.1996.tb53549.x. |
Idioma: |
Inglês |
Conteúdo: |
Abstract: The objective of this study was to show the existence of genetic variability in resistance of Creole goats to natural infection with intestinal nematodes. Four successive cohorts of male and female kids were reared from weaning during 9 months in intensive pangola pastures (stocking rate 1.4 t/ha, regrowth of 21 days, 300 kg N/ ha/year of fertilization). All cohorts considered, 203 offsprings from 13 bucks and 149 goats were used in the experiment. Animals were treated with an oral dose of ivermectin every seven weeks, from 3 to 11 months of age. They were sampled for fecal egg counts (FEC) and packed cell volume (PCV), 6 weeks after drenching, when 6 and 10 months old. Haemonchus contortus and Trichostrongylus colubriformis were the predominant species. Data of one cohort when 6 months of age and another one when 10 months old were not included in calculations because a self-cure occurred during a rainy season. Estimated means of FEC after square-root transformation were 1054 and 711 respectively for 6-month-old and 10-month-old kids. Phenotypic correlations between FEC and PCV were -0.46 (p < 0.001) and -0.29 (p < 0.01) when 6 and 10 months old, respectively. FEC repeatabilities estimated as variance ratio were 0.47 and 0.06 for within-age measures (data recorded at one week interval) and between age measures (6 vs. 10 months) respectively. No sire effect was significant for PCV. Sire effect on FEC was more significant when 6 months old (p < 0.03) than when 10 months old (p < 0.15). Further studies are now being carried out to confirm this genetic determinism of resistance to natural infection with strongyles in Creole goats. MenosAbstract: The objective of this study was to show the existence of genetic variability in resistance of Creole goats to natural infection with intestinal nematodes. Four successive cohorts of male and female kids were reared from weaning during 9 months in intensive pangola pastures (stocking rate 1.4 t/ha, regrowth of 21 days, 300 kg N/ ha/year of fertilization). All cohorts considered, 203 offsprings from 13 bucks and 149 goats were used in the experiment. Animals were treated with an oral dose of ivermectin every seven weeks, from 3 to 11 months of age. They were sampled for fecal egg counts (FEC) and packed cell volume (PCV), 6 weeks after drenching, when 6 and 10 months old. Haemonchus contortus and Trichostrongylus colubriformis were the predominant species. Data of one cohort when 6 months of age and another one when 10 months old were not included in calculations because a self-cure occurred during a rainy season. Estimated means of FEC after square-root transformation were 1054 and 711 respectively for 6-month-old and 10-month-old kids. Phenotypic correlations between FEC and PCV were -0.46 (p < 0.001) and -0.29 (p < 0.01) when 6 and 10 months old, respectively. FEC repeatabilities estimated as variance ratio were 0.47 and 0.06 for within-age measures (data recorded at one week interval) and between age measures (6 vs. 10 months) respectively. No sire effect was significant for PCV. Sire effect on FEC was more significant when 6 months old (p < 0.03) than when 10 mo... Mostrar Tudo |
Palavras-Chave: |
Controle; Nematodeo gastrintestinal; Parasite Egg Count; Sex Characteristics; Trichostrongyloidea; Trichostrongyloidiasis. |
Thesagro: |
Caprino; Resistência Genética. |
Thesaurus Nal: |
French West Indies; Genetic resistance; Goat diseases; Goats; Phenotype; Seasons; Weight gain. |
Categoria do assunto: |
H Saúde e Patologia |
Marc: |
LEADER 02759naa a2200373 a 4500 001 1524007 005 2024-01-03 008 1996 bl uuuu u00u1 u #d 024 7 $a10.1111/j.1749-6632.1996.tb53549.x.$2DOI 100 1 $aMANDONNET, N. 245 $aGenetic variability in resistance of Creole goats to natural infection with trichostrongylids in Guadeloupe. 260 $c1996 520 $aAbstract: The objective of this study was to show the existence of genetic variability in resistance of Creole goats to natural infection with intestinal nematodes. Four successive cohorts of male and female kids were reared from weaning during 9 months in intensive pangola pastures (stocking rate 1.4 t/ha, regrowth of 21 days, 300 kg N/ ha/year of fertilization). All cohorts considered, 203 offsprings from 13 bucks and 149 goats were used in the experiment. Animals were treated with an oral dose of ivermectin every seven weeks, from 3 to 11 months of age. They were sampled for fecal egg counts (FEC) and packed cell volume (PCV), 6 weeks after drenching, when 6 and 10 months old. Haemonchus contortus and Trichostrongylus colubriformis were the predominant species. Data of one cohort when 6 months of age and another one when 10 months old were not included in calculations because a self-cure occurred during a rainy season. Estimated means of FEC after square-root transformation were 1054 and 711 respectively for 6-month-old and 10-month-old kids. Phenotypic correlations between FEC and PCV were -0.46 (p < 0.001) and -0.29 (p < 0.01) when 6 and 10 months old, respectively. FEC repeatabilities estimated as variance ratio were 0.47 and 0.06 for within-age measures (data recorded at one week interval) and between age measures (6 vs. 10 months) respectively. No sire effect was significant for PCV. Sire effect on FEC was more significant when 6 months old (p < 0.03) than when 10 months old (p < 0.15). Further studies are now being carried out to confirm this genetic determinism of resistance to natural infection with strongyles in Creole goats. 650 $aFrench West Indies 650 $aGenetic resistance 650 $aGoat diseases 650 $aGoats 650 $aPhenotype 650 $aSeasons 650 $aWeight gain 650 $aCaprino 650 $aResistência Genética 653 $aControle 653 $aNematodeo gastrintestinal 653 $aParasite Egg Count 653 $aSex Characteristics 653 $aTrichostrongyloidea 653 $aTrichostrongyloidiasis 700 1 $aAUMONT, G. 700 1 $aFLEURY, J. 700 1 $aGRUNER, L. 700 1 $aBOUIX, J. 700 1 $aVU TIEN KHANG, J. 773 $tAnnals of the New York Academy of Sciences$gv. 791, n. 1, p. 421-431, Jul. 1996.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|