RESUMO
The present investigation was carried out on 459 Murrah buffaloes affected with some reproductive problem with 618 calving records(out of total 1336 Murrah buffaloes) sired by 118 sires over a period of 12 years from 2007 to 2018 at GADVASU, Ludhiana. The heritability estimates for dystocia, retention of placenta (ROP), anestrus, repeat breeding (RB), abortion and postpartum abnormal discharge (PPAD) were 0.04, 0.10, 0.05, 0.074, 0.085 and 0.121 respectively. The overall means for breeding values for dystocia, ROP, abortion, anestrus, RB and PPAD were 0.4, 0.2, 0.4, 0.2, 0.078 and 11.8%, respectively. Rank correlation of abortion with ROP was very high (0.99±0.02) and with anestrus, dystocia, RB and PPAD were also high i.e. 0.98±0.03, 0.98±0.03, 0.97±0.03, 0.95±0.04 respectively. Heritability estimates of reproductive problems have indicated appreciable values, signifying that incorporation of these traits in selection program will enhance the rate of improvement.
RESUMO
The present investigation was carried out on 459 Murrah buffaloes affected with some reproductive problem with 618 calving records (out of total 1336 Murrah buffaloes) over a period of 12 years from 2007 to 2018 at GADVASU, Ludhiana. The overall incidence of dystocia, retention of placenta (ROP), anestrus, repeat breeding (RB),postpartum abnormal discharge (PPAD) and abortion w.r.t. total number of animals were 0.9, 0.3, 3.3, 9.3, 12.3, 13.3 and 6.2%, respectively and w.r.t. affected animals were 2.8, 9.8, 27, 35.7, 38.8 and 18.1%, respectively. Parity of calving had significant effect (P<0.05) on ROP and anestrus. Season had significant (P<0.05) effect on dystocia and ROP. Period had highly significant effect (P<0.01) on dystocia, anestrus, RB and abortion while significant effect on PPAD. Results indicated that incidence of RB, PPAD and ROP increases as the animal become older. Further incidence of dystocia are higher during first and last parities whereas incidence of anestrus are more during earlier parities (in heifers). Incidence of ROP and PPAD are more during rainy season. Incidence of dystocia and anestrus are more during winter season whereas incidence of abortion are more during summer season. Overall incidence revealed a reduction in reproductive disorders in latter periods showing progressive improvement in management of reproduction problems over period
RESUMO
Abstract Background: The global market has an increasing demand for buffalo by-products due to their unique nutritional characteristics. Many buffalo herds lack suitable breeding control programs, hindering the implementation of selection programs. Objective: To evaluate milk production per lactation (MP), lactation length (LL), and calving interval (CI) of a herd of crossbred Murrah buffaloes to support buffalo clustering according to their potential. Methods: Data from 543 lactations between 2002 and 2014 from 105 crossbred Murrah female buffaloes were used. Data were subjected to principal component analysis (PCA) and cluster analysis. Results: The first components (PCs) were responsible for 92.32% of the total variation, of which 61.45 and 30.87% were explained by the first (PC1) and second (PC2) components, respectively. The cluster analysis allowed three female buffalo groups according to their potentials. Conclusion: Buffalo farmers can make decisions on nutritional, reproductive management and cow culling based on grouping.
Resumen Antecedentes: La demanda de productos de leche de búfala en el mercado mundial viene creciendo en virtud de sus características nutricionales únicas. La mayoría de los hatos bufalinos no tienen adecuados controles, lo que dificulta la implementación de programas de selección. Objetivo: Analizar la producción de leche por lactancia (MP), duración de la lactancia (LL) y el intervalo entre partos (CI) para apoyar la clasificación de búfalos según su potencial. Métodos: Se recogieron 543 registros de lactancia de 105 búfalas Murrah mestizas entre los años 2002 y 2014. Los datos fueron sometidos a análisis de componentes principales (PCA) y análisis de conglomerados. Resultados: Los primeros componentes (PCs) fueron responsables del 92.32% de la variación total, de los cuales 61.45 y 30.87% fueron explicados por el primer (PC1) y segundo (PC2) componentes, respectivamente. El análisis de conglomerados permitió la formación de tres grupos de búfalas, según su potencial. Conclusión: Los productores pueden tomar decisiones específicas con respecto a la gestión nutricional, reproductiva, y el descarte de hembras bufalinas basados en estas agrupaciones.
Resumo Antecedentes: A demanda por produtos de origem do leite de búfalas no mercado mundial tem crescido em virtude de suas características nutricionais singulares. Grande parte dos rebanhos de búfalos não possuem controle zootécnicos adequados, dificultando a implementação de programas de seleção. Objetivo: Analisar conjuntamente as características produção de leite por lactação (MP), duração da lactação (LL) e intervalo de partos (CI) para subsidiar a classificação das búfalas de acordo com seu potencial. Métodos: Para esse estudo, 543 dados de lactação de 105 búfalas mestiças Murrah foram coletadas entre 2002 e 2014. Os dados foram analisados por análises de componentes principais (PCA) e análises de cluster. Resultados: Os primeiros componentes (PCs) foram responsáveis por 92.32% da variação total, dos quais 61.45 e 30.87% foram explicados pelo primeiro (PC1) e segundo (PC2) componentes, respectivamente. A análise de cluster permitiu a formação de três grupos de búfalas de acordo com o potencial das características estudadas. Conclusão: Baseado nesses agrupamentos, os produtores podem tomar decisões específicas quanto aos manejos nutricional e reprodutivo, e sobre o descarte de búfalas, de acordo com os agrupamentos.