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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
03/10/2008 |
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Data da última atualização: |
20/06/2023 |
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Autoria: |
MAVROGENIS, A. P.; PAPACHRISTOFOROU, C.; LYSANDRIDES, P.; ROUSHIAS, A. |
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Título: |
Environmental and genetic effects on udder characteristics and milk production in Damascus goats. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
Small Ruminants Research, v. 2, n. 4, p. 333-343, Nov. 1989. |
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DOI: |
https://doi.org/10.1016/0921-4488(89)90028-X |
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Idioma: |
Inglês |
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Conteúdo: |
A total of 829 records collected at three experimental farms (ARI, Athalassa and Orites) from 1979 to 1982 was studied for environmental and genetic influences on udder characteristics and milk production in Damascus goats. All udder traits were recorded following weaning (70 ± 3 days) concurrently with the first milk recording (7± 3 days after weaning). Most traits were significantly rekated to flock except milking ease, test-day milk and 90-day milk yield. Year effects were small (P>0.05) for udder depth, udder floor, udder quality, milking ease and total milk yield. Season significantly affected udder depth and total milk production. Lactation number had a significant effect on all traits except udder floor, udder quality and milking ease. Udder floor was significantly related to milk production, while udder quality and milking ease had no effect. Most heritability estimates, except for udder quality (0.03 ± 0.09), were moderate to high. Test-day milk yield (0.31 ± 0.11) and udder floor (0.22 ± 0.11) had moderately low heritability estimates, while teat length and diameter were highly heritable (from 0.55 ± 0.13 to 0.77 ± 0.14). Heritability estimates for 90-day and total milk production were 0.52 ± 0.13 and 0.46 ± 0.12, respectively. Udder circumference and udder depth (traits that describe the volume of the udder) were moderately heritable. Genetic association of udder circumference before milking with milk production was moderately high. Phenotypic correlation among the above traits was positive and also moderately high. MenosA total of 829 records collected at three experimental farms (ARI, Athalassa and Orites) from 1979 to 1982 was studied for environmental and genetic influences on udder characteristics and milk production in Damascus goats. All udder traits were recorded following weaning (70 ± 3 days) concurrently with the first milk recording (7± 3 days after weaning). Most traits were significantly rekated to flock except milking ease, test-day milk and 90-day milk yield. Year effects were small (P>0.05) for udder depth, udder floor, udder quality, milking ease and total milk yield. Season significantly affected udder depth and total milk production. Lactation number had a significant effect on all traits except udder floor, udder quality and milking ease. Udder floor was significantly related to milk production, while udder quality and milking ease had no effect. Most heritability estimates, except for udder quality (0.03 ± 0.09), were moderate to high. Test-day milk yield (0.31 ± 0.11) and udder floor (0.22 ± 0.11) had moderately low heritability estimates, while teat length and diameter were highly heritable (from 0.55 ± 0.13 to 0.77 ± 0.14). Heritability estimates for 90-day and total milk production were 0.52 ± 0.13 and 0.46 ± 0.12, respectively. Udder circumference and udder depth (traits that describe the volume of the udder) were moderately heritable. Genetic association of udder circumference before milking with milk production was moderately high. Phenotypic correlation among th... Mostrar Tudo |
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Palavras-Chave: |
Correlação; Efeito ambiental; Fatores geneticos; Genetic inheritance; Genetic parameters; Herdabilidade; Produção de leite; Úbere. |
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Thesagro: |
Caprino; Glândula Mamaria; Leite de Cabra; Rendimento. |
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Thesaurus Nal: |
Animal genetics; Dairy goats; Heritability; Phenotypic correlation. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02635naa a2200361 a 4500
001 1528993
005 2023-06-20
008 1989 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/0921-4488(89)90028-X$2DOI
100 1 $aMAVROGENIS, A. P.
245 $aEnvironmental and genetic effects on udder characteristics and milk production in Damascus goats.$h[electronic resource]
260 $c1989
520 $aA total of 829 records collected at three experimental farms (ARI, Athalassa and Orites) from 1979 to 1982 was studied for environmental and genetic influences on udder characteristics and milk production in Damascus goats. All udder traits were recorded following weaning (70 ± 3 days) concurrently with the first milk recording (7± 3 days after weaning). Most traits were significantly rekated to flock except milking ease, test-day milk and 90-day milk yield. Year effects were small (P>0.05) for udder depth, udder floor, udder quality, milking ease and total milk yield. Season significantly affected udder depth and total milk production. Lactation number had a significant effect on all traits except udder floor, udder quality and milking ease. Udder floor was significantly related to milk production, while udder quality and milking ease had no effect. Most heritability estimates, except for udder quality (0.03 ± 0.09), were moderate to high. Test-day milk yield (0.31 ± 0.11) and udder floor (0.22 ± 0.11) had moderately low heritability estimates, while teat length and diameter were highly heritable (from 0.55 ± 0.13 to 0.77 ± 0.14). Heritability estimates for 90-day and total milk production were 0.52 ± 0.13 and 0.46 ± 0.12, respectively. Udder circumference and udder depth (traits that describe the volume of the udder) were moderately heritable. Genetic association of udder circumference before milking with milk production was moderately high. Phenotypic correlation among the above traits was positive and also moderately high.
650 $aAnimal genetics
650 $aDairy goats
650 $aHeritability
650 $aPhenotypic correlation
650 $aCaprino
650 $aGlândula Mamaria
650 $aLeite de Cabra
650 $aRendimento
653 $aCorrelação
653 $aEfeito ambiental
653 $aFatores geneticos
653 $aGenetic inheritance
653 $aGenetic parameters
653 $aHerdabilidade
653 $aProdução de leite
653 $aÚbere
700 1 $aPAPACHRISTOFOROU, C.
700 1 $aLYSANDRIDES, P.
700 1 $aROUSHIAS, A.
773 $tSmall Ruminants Research$gv. 2, n. 4, p. 333-343, Nov. 1989.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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