Short communication: Population structure of the South African Bonsmara beef breed using high density single nucleotide polymorphism genotypes

Bosman, Lydia; Marle-Köster, E. van; Westhuizen, R. R. van der; Visser, Carina; Berry, D.P.

doi:10.1016/j.livsci.2017.01.012

Cited by 6 publications

(7 citation statements)

References 33 publications

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“…More specifically, the mean expected heterozygosity values were comparable in Nguni (He = 0.362) and Bonsmara (He = 0.361) populations (Table 1). In addition, the level of genetic diversity in Bonsmara populations was similar to those reported by Bosman et al (2017) with He = 0.365. However, the Nguni population had higher level of genetic diversity than previously reported by Makina et al (2014) with He = 0.28, although this may be due to the low number of samples in the previous study.…”

Section: Discussionsupporting

confidence: 84%

Selection Signatures in South African Nguni and Bonsmara Cattle Populations Reveal Genes Relating to Environmental Adaptation

et al. 2022

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Climate change is a major influencing factor in beef production. The greenhouse gases produced from livestock production systems contribute to the overall greenhouse gas emissions. The aim of this study was to identify selection signatures within and between Nguni and Bonsmara cattle in relation to production and adaptation. For this purpose, genomic 150 K single nucleotide polymorphism data from Nguni (n = 231) and Bonsmara (n = 252) cattle in South Africa were used. Extended haplotype homozygosity (EHH) based analysis was executed within each population using integrated haplotype score (iHS). The R package rehh was used for detecting selection signatures across the two populations with cross population EHH (XP-EHH). Total of 121 regions of selection signatures were detected (p < 0.0001) in the Bonsmara and Nguni populations. Several genes relating to DNA methylation, heat stress, feed efficiency and nitrogen metabolism were detected within and between each population. These regions also included QTLs associated with residual feed intake, residual gain, carcass weight, stature and body weight in the Bonsmara, while QTLs associated with conception rate, shear force, tenderness score, juiciness, temperament, heat tolerance, feed efficiency and age at puberty were identified in Nguni. Based on the results of the study it is recommended that the Nguni and Bonsmara be utilized in crossbreeding programs as they have beneficial traits that may allow them to perform better in the presence of climate change. Results of this study coincide with Nguni and Bonsmara breed characteristics and performance, and furthermore support informative crossbreeding programs to enhance livestock productivity in South Africa.

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Section: Discussionsupporting

confidence: 84%

Selection Signatures in South African Nguni and Bonsmara Cattle Populations Reveal Genes Relating to Environmental Adaptation

et al. 2022

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“…Specific information on the quality and viability of recovered Bonsmara oocytes are not well documented in the literature. Bonsmara is a composite breed consisting of ⅝ indigenous Afrikaner (Bos taurus africanis) and ⅜ exotic Shorthorn or Hereford (Bos taurus) breeds [33,34]. The significant association between the numbers of oocytes harvested from Brahman cows in relation to other breeds (Table 3) in the current study might be as a result of the Bos indicus characteristics that generally provide improved oocyte recovery rates and quality, but these physiological differences between breeds still lack substantial explanation.…”

Section: Several Studies Reported Higher Recovery Rates Of Viable Oocmentioning

confidence: 84%

Serum albumin concentration of donor cows as an indicator of developmental competence of oocytes

et al. 2019

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Highlights• Serum albumin level of donor cows independently and significantly predicts developmental competence of oocytes.• Adjusting the levels of protein supplementation in in vitro culture protocols based on donor serum albumin may be warranted.• Albumin levels in follicular fluid are not correlated, indicating regulatory mechanism that determines follicular fluid albumin level. AbstractAdequate nutrition is required for maintenance of normal reproduction in cattle.Albumin, the best marker and fundamental part of nutrition, most abundant plasma protein and major component of fetal bovine serum, is the best predictor of malnourishment in South African cattle. The aim of this study was to determine if serum albumin concentrations of donor cows predict the developmental competence of oocytes, and if additional protein supplementation of the in vitro culture media improves embryo outcomes in oocytes from cows with inadequate serum albumin concentrations. Oocytes (n = 1024) were recovered from donors with inadequate (≤35.9 g/L), or adequate serum albumin concentrations (≥36.0 g/L).Four hundred and sixty oocytes originated from cows with inadequate serum albumin and 564 from cows with adequate serum albumin. Oocytes of these cohorts were randomly allocated to a control and supplemented fetal bovine serum in vitro embryo culture protocol. Multiple linear, logistic and Poisson regression analyses were performed to estimate the effects of

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“…Studies based on Single Nucleotide Polymorphism (SNP) arrays reported moderate levels of heterozygosity for the Afrikaner (0.22-0.24), Bonsmara (0.36), Drakensberger (0.25-0.35), and Nguni (0.23-0.28) [65][66][67]. Inbreeding coefficients reported in the same studies were negligible to low for all breeds.…”

Section: Genetic and Genomic Characterizationmentioning

confidence: 87%

Capitalizing on the Potential of South African Indigenous Beef Cattle Breeds: A Review

et al. 2021

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Cattle populations arrived in Southern Africa almost 2000 years ago, brought by farming communities migrating southwards. For centuries, cattle have been an integral component of livestock production to meet the animal protein needs of a growing population and they are also important in many cultural and religious events, as repositories of wealth and signifiers of social status. Selection within these cattle populations led to the development of breeds such as the Nguni, Afrikaner and Drakensberger that are well adapted to the local production environment. Genetic information has been generated for most of these populations, providing new insights into their ancestry and indicating moderate levels of diversity and relatively low inbreeding. Indigenous cattle breeds are present in both the well-developed commercial sector as well as the developing South African livestock sector. These breeds have been included in several research studies, mostly focusing on their production and adaptive potential. Genetic improvement of the local cattle populations and breeds, which are often more resilient to local environmental conditions, has the potential to improve the productivity of the small-scale production developing sector and contribute to the alleviation of poverty.

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Short communication: Population structure of the South African Bonsmara beef breed using high density single nucleotide polymorphism genotypes

Cited by 6 publications

References 33 publications

Selection Signatures in South African Nguni and Bonsmara Cattle Populations Reveal Genes Relating to Environmental Adaptation

Selection Signatures in South African Nguni and Bonsmara Cattle Populations Reveal Genes Relating to Environmental Adaptation

Serum albumin concentration of donor cows as an indicator of developmental competence of oocytes

Capitalizing on the Potential of South African Indigenous Beef Cattle Breeds: A Review

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