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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
10/07/2017 |
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Data da última atualização: |
27/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PEREZ, B. C.; BALIEIRO, J. C. C.; VENTURA, R. V.; BRUNELI, F. A. T.; PEIXOTO, M. G. C. D. |
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Afiliação: |
B. C. PEREZ; J. C. C. BALIEIRO; R. V. VENTURA; FRANK ANGELO TOMITA BRUNELI, CNPGL; MARIA GABRIELA CAMPOLINA D PEIXOTO, CNPGL. |
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Título: |
Inbreeding effects on in vitro embryo production traits in Guzerá cattle. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Animal, 2017. |
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Páginas: |
8 p. |
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DOI: |
10.1017/S1751731117000854 |
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Idioma: |
Inglês |
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Conteúdo: |
Inbreeding has been associated with the impairment of reproductive performance in many cattle breeds. Although the usage of reproductive biotechnologies has been increasing in bovine populations, not much attention has been given to the impact of inbreeding over cow?s performance on artificial reproduction. The objective of this study was to estimate the impact of inbreeding on in vitro embryo production in a Guzerá breed population. The inbreeding coefficient (F), calculated as half of the co-ancestry of the individual?s parents, was used as an estimate of inbreeding. The inbreeding coefficients of the donor, sire (used on in vitro fertilization) and of the embryos were included, separately, in the proposed models either as classificatory or continuous variables (linear and quadratic effects). The percentage of non-inbred individuals (or embryos) and mean F of donors, embryos and sires were 29.38%; 35.76%; 42.86% and 1.98±2.68; 1.32±3.13; 2.08±2.79, respectively. Two different models were considered, one for oocyte production traits and other for embryo production traits. The increase of F of the donor significantly (P<0.05) impaired the number of viable oocytes (N OV), number of grade I oocytes (N GI) and number of cleaved embryos (N CLV). Moreover, the donor?s F influenced the percentage of grade I oocytes (P GI), percentage of viable embryos (P EMB) and percentage of cleaved embryos that turned into embryos (P CXE). No significant (P>0.05) effects were observed for the sire (father of the embryos) inbreeding coefficient over the traits analysed. Embryo?s F influenced (P<0.05) the number of viable embryos (N EMB), percentage of viable embryos (P EMB) and percentage of cleaved embryos that turn into embryos (P CXE). Results suggested that an increase in the inbreeding coefficient might impair the embryos ability to survive through challenges imposed by the in vitro environment. Submitting highly inbred Guzerá female donors to in vitro embryo production may, in the long-term, have negative implications on the number of embryos obtained per cow and increase the relative costs of the improvement programmes based on this technology. High levels of inbreeding should be avoided when selecting Guzerá female donors and planning in vitro fertilization mating. MenosInbreeding has been associated with the impairment of reproductive performance in many cattle breeds. Although the usage of reproductive biotechnologies has been increasing in bovine populations, not much attention has been given to the impact of inbreeding over cow?s performance on artificial reproduction. The objective of this study was to estimate the impact of inbreeding on in vitro embryo production in a Guzerá breed population. The inbreeding coefficient (F), calculated as half of the co-ancestry of the individual?s parents, was used as an estimate of inbreeding. The inbreeding coefficients of the donor, sire (used on in vitro fertilization) and of the embryos were included, separately, in the proposed models either as classificatory or continuous variables (linear and quadratic effects). The percentage of non-inbred individuals (or embryos) and mean F of donors, embryos and sires were 29.38%; 35.76%; 42.86% and 1.98±2.68; 1.32±3.13; 2.08±2.79, respectively. Two different models were considered, one for oocyte production traits and other for embryo production traits. The increase of F of the donor significantly (P<0.05) impaired the number of viable oocytes (N OV), number of grade I oocytes (N GI) and number of cleaved embryos (N CLV). Moreover, the donor?s F influenced the percentage of grade I oocytes (P GI), percentage of viable embryos (P EMB) and percentage of cleaved embryos that turned into embryos (P CXE). No significant (P>0.05) effects were observed for the s... Mostrar Tudo |
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Palavras-Chave: |
Bovine artificial reproduction; Ovum pick-up; Zebu cattle. |
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Thesaurus Nal: |
in vitro fertilization; inbreeding depression. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03023naa a2200253 a 4500
001 2072429
005 2023-01-27
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1017/S1751731117000854$2DOI
100 1 $aPEREZ, B. C.
245 $aInbreeding effects on in vitro embryo production traits in Guzerá cattle.$h[electronic resource]
260 $c2017
300 $a8 p.
520 $aInbreeding has been associated with the impairment of reproductive performance in many cattle breeds. Although the usage of reproductive biotechnologies has been increasing in bovine populations, not much attention has been given to the impact of inbreeding over cow?s performance on artificial reproduction. The objective of this study was to estimate the impact of inbreeding on in vitro embryo production in a Guzerá breed population. The inbreeding coefficient (F), calculated as half of the co-ancestry of the individual?s parents, was used as an estimate of inbreeding. The inbreeding coefficients of the donor, sire (used on in vitro fertilization) and of the embryos were included, separately, in the proposed models either as classificatory or continuous variables (linear and quadratic effects). The percentage of non-inbred individuals (or embryos) and mean F of donors, embryos and sires were 29.38%; 35.76%; 42.86% and 1.98±2.68; 1.32±3.13; 2.08±2.79, respectively. Two different models were considered, one for oocyte production traits and other for embryo production traits. The increase of F of the donor significantly (P<0.05) impaired the number of viable oocytes (N OV), number of grade I oocytes (N GI) and number of cleaved embryos (N CLV). Moreover, the donor?s F influenced the percentage of grade I oocytes (P GI), percentage of viable embryos (P EMB) and percentage of cleaved embryos that turned into embryos (P CXE). No significant (P>0.05) effects were observed for the sire (father of the embryos) inbreeding coefficient over the traits analysed. Embryo?s F influenced (P<0.05) the number of viable embryos (N EMB), percentage of viable embryos (P EMB) and percentage of cleaved embryos that turn into embryos (P CXE). Results suggested that an increase in the inbreeding coefficient might impair the embryos ability to survive through challenges imposed by the in vitro environment. Submitting highly inbred Guzerá female donors to in vitro embryo production may, in the long-term, have negative implications on the number of embryos obtained per cow and increase the relative costs of the improvement programmes based on this technology. High levels of inbreeding should be avoided when selecting Guzerá female donors and planning in vitro fertilization mating.
650 $ain vitro fertilization
650 $ainbreeding depression
653 $aBovine artificial reproduction
653 $aOvum pick-up
653 $aZebu cattle
700 1 $aBALIEIRO, J. C. C.
700 1 $aVENTURA, R. V.
700 1 $aBRUNELI, F. A. T.
700 1 $aPEIXOTO, M. G. C. D.
773 $tAnimal, 2017.
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| Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
27/01/2020 |
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Data da última atualização: |
24/04/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
ALBIERO-JÚNIOR, A.; VENEGAS-GONZÁLEZ, A.; RODRÍGUEZ-CATÓN, M.; OLIVEIRA, J. M.; LONGHI-SANTOS, T.; GALVÃO, F.; GODINHO TEMPONI, L.; BOTOSSO, P. C. |
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Afiliação: |
ALCI ALBIERO-JÚNIOR, USP; ALEJANDRO VENEGAS-GONZÁLEZ, Universidad Mayor; MILAGROS RODRÍGUEZ-CATÓN, Instituto Argentino de Nivología; JULIANO MORALES OLIVEIRA, Universidade do Vale do Rio dos Sinos; TOMAZ LONGHI-SANTOS, UFPR; FRANKLIN GALVÃO, UFPR; LIVIA GODINHO TEMPONI, Universidade Estadual do Oeste Paranaense; PAULO CESAR BOTOSSO, CNPF. |
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Título: |
Edge effects modify the growth dynamics and climate sensitivity of Araucaria angustifolia trees. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Tree-Ring Research, v. 76, n. 1, p. 11-26, 2020. |
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DOI: |
http://dx.doi.org/10.3959/TRR2018-9 |
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Idioma: |
Inglês |
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Conteúdo: |
Edge effects are a major cause of natural dynamics of fragmented forests; however, studies that evaluate edge effects during the lifetime of trees are relatively rare. Through a long-term perspective of tree growth, dendroecology can contribute to a better understanding of the influence of edge effects. In order to frame our interpretation, we raised the following hypotheses: (1) trees located close to a forest edge have lower growth rates compared to trees growing far from edges, and (2) climate sensitivity of trees naturally growing on the forest edge is different from the trees in the interior. This study was conducted in Southern Brazil, where 21 Araucaria angustifolia located 50 m from the edge and 19 individuals located 4000 m from the forest edge were sampled. Dendrochronological study followed the usual procedures and growth patterns were evaluated using basal area increment, specific threshold value of fast and slow growth, and principal components analysis. During the 54 years analyzed, results indicated that the edge effect reduced growth by 30% in diameter increment and wood production of A. angustifolia trees. Regarding the influence of climatic variability on tree growth, we observed that edge effects may exert strong pressure on growth responses to climate in A. angustifolia located on forest edges, making individuals in those environments potentially more sensitive to variations in temperature and rainfall, mainly at warmer times of year. We therefore emphasize the importance of considering edge trees as potential bioindicators of historical environmental changes and forest fragmentation. Future studies should be carried out in other forest types and with different tree species (e.g. pioneer vs. shade-tolerant, trees vs. shrubs) to test the reliability of our results and provide more robust conclusions about this phenomenon. MenosEdge effects are a major cause of natural dynamics of fragmented forests; however, studies that evaluate edge effects during the lifetime of trees are relatively rare. Through a long-term perspective of tree growth, dendroecology can contribute to a better understanding of the influence of edge effects. In order to frame our interpretation, we raised the following hypotheses: (1) trees located close to a forest edge have lower growth rates compared to trees growing far from edges, and (2) climate sensitivity of trees naturally growing on the forest edge is different from the trees in the interior. This study was conducted in Southern Brazil, where 21 Araucaria angustifolia located 50 m from the edge and 19 individuals located 4000 m from the forest edge were sampled. Dendrochronological study followed the usual procedures and growth patterns were evaluated using basal area increment, specific threshold value of fast and slow growth, and principal components analysis. During the 54 years analyzed, results indicated that the edge effect reduced growth by 30% in diameter increment and wood production of A. angustifolia trees. Regarding the influence of climatic variability on tree growth, we observed that edge effects may exert strong pressure on growth responses to climate in A. angustifolia located on forest edges, making individuals in those environments potentially more sensitive to variations in temperature and rainfall, mainly at warmer times of year. We therefore emphasi... Mostrar Tudo |
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Palavras-Chave: |
Basal area increment; Brazilian pine; Dendroecologia; Dendroecology; Forest fragmentation; Mixed Ombrophilous Forest. |
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Thesagro: |
Araucária Angustifólia; Crescimento; Espécie Nativa; Pinheiro do Paraná. |
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Thesaurus NAL: |
Growth rings. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02937naa a2200349 a 4500
001 2119357
005 2020-04-24
008 2020 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.3959/TRR2018-9$2DOI
100 1 $aALBIERO-JÚNIOR, A.
245 $aEdge effects modify the growth dynamics and climate sensitivity of Araucaria angustifolia trees.$h[electronic resource]
260 $c2020
520 $aEdge effects are a major cause of natural dynamics of fragmented forests; however, studies that evaluate edge effects during the lifetime of trees are relatively rare. Through a long-term perspective of tree growth, dendroecology can contribute to a better understanding of the influence of edge effects. In order to frame our interpretation, we raised the following hypotheses: (1) trees located close to a forest edge have lower growth rates compared to trees growing far from edges, and (2) climate sensitivity of trees naturally growing on the forest edge is different from the trees in the interior. This study was conducted in Southern Brazil, where 21 Araucaria angustifolia located 50 m from the edge and 19 individuals located 4000 m from the forest edge were sampled. Dendrochronological study followed the usual procedures and growth patterns were evaluated using basal area increment, specific threshold value of fast and slow growth, and principal components analysis. During the 54 years analyzed, results indicated that the edge effect reduced growth by 30% in diameter increment and wood production of A. angustifolia trees. Regarding the influence of climatic variability on tree growth, we observed that edge effects may exert strong pressure on growth responses to climate in A. angustifolia located on forest edges, making individuals in those environments potentially more sensitive to variations in temperature and rainfall, mainly at warmer times of year. We therefore emphasize the importance of considering edge trees as potential bioindicators of historical environmental changes and forest fragmentation. Future studies should be carried out in other forest types and with different tree species (e.g. pioneer vs. shade-tolerant, trees vs. shrubs) to test the reliability of our results and provide more robust conclusions about this phenomenon.
650 $aGrowth rings
650 $aAraucária Angustifólia
650 $aCrescimento
650 $aEspécie Nativa
650 $aPinheiro do Paraná
653 $aBasal area increment
653 $aBrazilian pine
653 $aDendroecologia
653 $aDendroecology
653 $aForest fragmentation
653 $aMixed Ombrophilous Forest
700 1 $aVENEGAS-GONZÁLEZ, A.
700 1 $aRODRÍGUEZ-CATÓN, M.
700 1 $aOLIVEIRA, J. M.
700 1 $aLONGHI-SANTOS, T.
700 1 $aGALVÃO, F.
700 1 $aGODINHO TEMPONI, L.
700 1 $aBOTOSSO, P. C.
773 $tTree-Ring Research$gv. 76, n. 1, p. 11-26, 2020.
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