近亲繁殖对特定犬种产仔数和存活率的影响。

Inbreeding impact on litter size and survival in selected canine breeds.

作者信息

Leroy Grégoire, Phocas Florence, Hedan Benoit, Verrier Etienne, Rognon Xavier

机构信息

AgroParisTech, UMR 1313 Génétique Animale et Biologie Intégrative, Paris F-75231, France; INRA, UMR 1313 Génétique Animale et Biologie Intégrative, Jouy-en-Josas F-78352, France.

出版信息

Vet J. 2015 Jan;203(1):74-8. doi: 10.1016/j.tvjl.2014.11.008. Epub 2014 Nov 18.

DOI:10.1016/j.tvjl.2014.11.008

PMID:25475165

Abstract

Data obtained from the French Kennel Club and the Fichier National Canin were used to estimate the effect of inbreeding on average litter size and survival in seven French breeds of dog. Depending on the breed, litter sizes were 3.5-6.3 puppies and longevities were 7.7-12.2 years. Estimated heritabilities were 6.0-10.9% for litter size and 6.1-10.1% for survival at 2 years of age. Regression coefficients indicated a negative effect of inbreeding on both individual survival and litter size. Although the impact of baseline inbreeding within breeds appears to be limited, the improper mating of close relatives will reduce biological fitness through significant reduction of litter size and longevity.

摘要

从法国养犬俱乐部和法国国家犬类档案中获取的数据，用于估计近亲繁殖对7个法国犬种平均窝产仔数和存活率的影响。根据犬种不同，窝产仔数为3.5 - 6.3只幼犬，寿命为7.7 - 12.2年。窝产仔数的估计遗传力为6.0 - 10.9%，2岁时存活率的估计遗传力为6.1 - 10.1%。回归系数表明近亲繁殖对个体存活率和窝产仔数均有负面影响。尽管品种内基线近亲繁殖的影响似乎有限，但近亲不当交配会通过显著降低窝产仔数和寿命来降低生物适应性。