Pedigree analysis in the Polish Red cattle population

Jarnecka, O.; Bauer, Edyta; Jagusiak, W.

doi:10.1016/j.animal.2021.100238

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…A recent study estimated parameters related to the population structure and genetic diversity of the Simmental breed based on pedigree information from 77,553 Simmental beef cattle [ 32 ]. In addition, there are studies that analyzed population structure and inbreeding levels based on pedigree information of 9,170 Polish red bulls [ 33 ]. Compared to our study, they have more abundant production data for calculating metrics such as Ne and inbreeding levels.…”

Section: Resultsmentioning

confidence: 99%

Characterization analysis of Rongchang pig population based on the Zhongxin-1 Porcine Breeding Array PLUS

Dong¹,

Ge²,

Sun³

2023

Anim Biosci

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Objective: To carry out a comprehensive production planning of the existing Rongchang pig population from both environmental and genetic aspects, and to establish a closed population with stable genetic diversity and strict pathogen control, it is necessary to fully understand the genetic background of the population.Methods: We genotyped 54 specific pathogen free (SPF) Rongchang pigs using the Zhongxin-1 Porcine Breeding Array PLUS, calculated their genetic diversity parameters and constructed their families. In addition, we also counted the runs of homozygosity (ROH) of each individual and calculated the value of inbreeding coefficient based on ROH for each individual.Results: Firstly, the results of genetic diversity analysis showed that the effective population size (Ne) of this population was 3.2, proportion of polymorphic markers (PN) was 0.515, desired heterozygosity (He) and observed heterozygosity (Ho) were 0.315 and 0.335. Ho was higher than He, indicating that the heterozygosity of all the selected loci was high. Secondly, combining the results of genomic relatedness analysis and cluster analysis, it was found that the existing Rongchang pig population could be divided into four families. Finally, we also counted the ROH of each individual and calculated the inbreeding coefficient value accordingly, whose mean value was 0.09.Conclusion: Due to the limitation of population size and other factors, the genetic diversity of this Rongchang pig population is low. The results of this study can provide basic data to support the development of Rongchang pig breeding program, the establishment of SPF Rongchang pig closed herd and its experimental utilization.

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Section: Resultsmentioning

confidence: 99%

Characterization analysis of Rongchang pig population based on the Zhongxin-1 Porcine Breeding Array PLUS

Dong¹,

Ge²,

Sun³

2023

Anim Biosci

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“…This ratio has shifted from 1.38 to 3.17, while the cow-to-bull paired ratio has risen from 26.1 to 36.71. This contrasts with the Polish Red breed, which has a reported ratio of 9.3 [32] and is a breed of international significance because it is the only native breed in this country with the characteristics of resistance and adaptability, such as a high content of total solids, resistance to harsh environments and diseases (tuberculosis and mastitis), good fertility, and longevity [30].…”

Section: Discussionmentioning

confidence: 99%

Analysis of Endangered Andalusian Black Cattle (Negra Andaluza) Reveals Genetic Reservoir for Bovine Black Trunk

Cartuche Macas,

Camacho Vallejo,

González Ariza

et al. 2024

Animals

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This comprehensive study on the Andalusian Black cattle breed reveals a substantial population decline, with the average herd size decreasing significantly from 305.54 to 88.28 animals per herd. This decline is primarily attributed to agricultural changes and the introduction of foreign meat-focused breeds. The male-to-female ratio shift is noteworthy, with more cows than bulls, impacting selection intensity for both genders. Inbreeding levels, though relatively low historically (5.94%) and currently (7.23%), raise concerns as 37.08% historically and 48.82% currently of the animals exhibit inbreeding. Positive assortative mating is evident, reflected by the increasing non-random mating coefficient (α). Key ancestors play a crucial role in shaping genetic diversity, with one ancestor significantly influencing the current genetic pool and the top 10 ancestors contributing substantially. Breed maintains a conservation index of 2.75, indicating relatively high genetic diversity. Recent conservation efforts have led to an increase in registered animals. The Cañadas Reales, historical transhumance routes, may have contributed to genetic connections among provinces. Challenges include the historical bottleneck, demographic changes, and potential impacts from reproductive practices. The Andalusian Black breed’s conservation necessitates ongoing efforts in genealogical registration, targeted breeding programs, and collaborative initiatives to address the observed demographic shifts and ensure sustainable genetic diversity.

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“…Inbreeding depression reduces the expression of dominant homozygous alleles [ 3 ] and reduces the rate of response to selection for selected traits [ 4 ]. Genetic diversity enables genetic improvement of animal production traits and, therefore, is important both economically and environmentally [ 5 ]. On the contrary, increasing the inbreeding coefficient by 1% resulted in a reduction in milk, fat, and protein production by 11.99 kg, 0.39 kg, and 0.29 kg, respectively [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Inbreeding in the Slovak Simmental Breed and Its Effect on Length of Productive Life

Strapáková,

Strapák

2024

Animals

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This study aimed to estimate the average inbreeding coefficient in Slovak Simmental dairy cattle and evaluate the effect of inbreeding on the length of productive life. All pedigrees included 463,282 animals dating back to 1914. The inbreeding coefficients for each animal in the pedigree were computed using the software CFC 1.0. Length of productive life (LPL) was defined as the time (days) from the first calving to culling, death, or censoring. The influence of inbreeding on the length of productive life was calculated and tested using the Weibull proportional hazards model. The average inbreeding coefficient, the average number of discrete generation equivalents, and the average longest ancestral path for inbred animals were 0.01, 6.59, and 13.08, respectively. While the largest decrease in the mean coefficient of inbreeding was observed from the year of birth 1995 (F = 1.50%) to 2001 (F = 0.59%), an increasing trend of inbreeding in the population was found from 2003 onwards. A weak but significant effect of inbreeding on the length of productive life of Simmental cows was confirmed using survival analysis.

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Pedigree analysis in the Polish Red cattle population

Cited by 7 publications

References 17 publications

Characterization analysis of Rongchang pig population based on the Zhongxin-1 Porcine Breeding Array PLUS

Characterization analysis of Rongchang pig population based on the Zhongxin-1 Porcine Breeding Array PLUS

Analysis of Endangered Andalusian Black Cattle (Negra Andaluza) Reveals Genetic Reservoir for Bovine Black Trunk

Evaluation of Inbreeding in the Slovak Simmental Breed and Its Effect on Length of Productive Life

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