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Non-genetic factors influencing reproductive traits and calving weight in Saudi camels

机译：影响沙特骆驼繁殖性状和产犊体重的非遗传因素

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摘要

Reproductive traits and calving weight were assessed in Saudi camels, and non-genetic factors influencing them were studied using data collected at Al Jouf centre from 1987 to 2009. Age at first conception, age at first calving, open period, calving interval, gestation length and weight at calving of camels averaged 42.3 months, 54.8 months, 10.6 months, 22.6 months, 377.5 days and 591.9 kg, respectively. A mixed model including the camel as a random effect was used to assess the effect of environmental effects on the traits studied. Age at first conception and age at first calving were affected by camel's birth year. Open period and calving interval were not affected by parity or year of calving. However, camels that calved from October to February had a calving interval of 2.5 months higher than those that calved from March to September. Gestation length was affected by season and year of calving but not by parity or sex of calf. Camels calving from March to September had a gestation length 6.6 days shorter than those calving from October to February. Weight at calving was affected by parity and year of calving but not by season of calving. It was concluded that an improvement in camel reproductive traits is possible both through improving management systems and utilisation of controlled breeding techniques.
机译：评估了沙特骆驼的生殖特性和产犊体重，并使用1987年至2009年在Al Jouf中心收集的数据研究了影响它们的非遗传因素。初受胎龄，初产胎龄，开放期，产犊间隔，妊娠期骆驼产犊时的平均体重分别为42.3个月，54.8个月，10.6个月，22.6个月，377.5天和591.9公斤。使用包括骆驼作为随机效应的混合模型来评估环境效应对所研究性状的影响。第一次受孕的年龄和第一次产犊的年龄受骆驼的出生​​年份影响。开产期和产犊间隔不受产犊或产犊年份的影响。但是，从10月至2月产犊的骆驼的产犊间隔比3月至9月产犊的骆驼间隔高2.5个月。妊娠长度受产犊季节和年份的影响，但不受胎龄或性别的影响。从三月至九月产犊的骆驼的妊娠期比从十月至二月产犊的骆驼的妊娠期短6.6天。产犊时的体重受胎次和产犊年的影响，但不受产犊季节的影响。结论是，通过改善管理系统和利用受控育种技术，可以改善骆驼的生殖性状。

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