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Factors affecting calving ease in Egyptian buffalo.

Amin M S Amin1, Mohamed M I Salem2, Mohamed M E Ibrahim1

  • 11Animal Production Research Institute, Agricultural Research Center, Ministry of Agriculture, Egypt.

Reproduction in Domestic Animals = Zuchthygiene
|September 30, 2020
PubMed
Summary

Calving ease (CE) in Egyptian buffalo is influenced by environmental factors like herd and calving season. Low heritability suggests direct selection is ineffective for improving CE.

Keywords:
Bayesian analysisbuffalocalving easegenetic parameters

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Area of Science:

  • Animal Science
  • Genetics
  • Reproductive Biology

Background:

  • Calving ease (CE) is crucial for animal welfare and farm profitability in buffalo populations.
  • Understanding factors influencing CE is essential for effective breeding and management strategies.

Purpose of the Study:

  • To investigate the genetic and environmental factors affecting calving ease (CE) in Primiparous (PP) and multiparous (MP) Egyptian buffalo.
  • To estimate direct and maternal heritabilities for CE in these buffalo populations.

Main Methods:

  • Analysis of 9,627 calving records from 1988 to 2018, including data from 1999 MP and 2,110 PP buffalo.
  • Statistical evaluation of environmental factors (herd, season, year, birth weight, parity order, gestation length) and genetic parameters (heritability).

Main Results:

  • Herd, season of calving, year of calving, birth weight, parity order, and gestation length significantly impacted CE rates.
  • Age at first calving and sex of calf showed no significant effects on CE.
  • Direct heritability for CE was estimated at 0.06, and maternal heritability at 0.01.

Conclusions:

  • Environmental factors play a significant role in calving ease in Egyptian buffalo.
  • The low heritability estimates for CE indicate that direct genetic selection alone is unlikely to be an effective strategy for improvement.