Genetic diversity analysis of six Spanish native cattle breeds using microsatellites

Martín-Burriel, Inmaculada; García-Muro, E; Zaragoza, Pilar

doi:10.1046/j.1365-2052.1999.00437.x

Cited by 93 publications

(57 citation statements)

References 25 publications

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“…Sob estimativa de valores exatos de probabilidade de Hardy-Weinberg, a população apresentou significância (P<0,01) para deficiência de heterozigotos e quando analisado cada marcador, oito locos (73%) apresentaram deficiência de heterozigotos. Este resultado é interessante pois relata número de locos com deficiência de heterozigotos acima do encontrado em raças sob risco de extinção (Martin-Burriel et al, 1999;Maudet et al, 2002). Maudet et al (2002) identificaram situação semelhante na raça Holstein e, assim, para raças com populações grandes e pouco isoladas, como Nelore e Holstein.…”

Section: Resultsunclassified

“…Tais resultados podem ser explicados pelos muitos cruzamentos preferenciais e endocruzamentos. Em raças submetidas a isolamento geográfico e com pequena população, a deriva genética e o efeito Wahlund (subdivisão populacional) parecem mais prováveis para explicar a baixa variabilidade e a ocorrência de desequilíbrio populacional (Martin-Burriel et al, 1999;Maudet et al, 2002).…”

Section: Resultsunclassified

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Diversidade genética e eficiência de DNA microssatélites para o controle genealógico da raça Nelore

Carneiro

Gonçalves

Schneider

et al. 2007

Arq. Bras. Med. Vet. Zootec.

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RESUMOForam estimados na raça Nelore a variabilidade genética e os valores de determinação de paternidade usando-se 11 marcadores microssatélites do painel ISAG/FAO. Estes foram organizados em quatro conjuntos de amplificação para genotipagem semi-automática por fluorescência. Todos os marcadores apresentaram-se altamente polimórficos, com média de 8,2 alelos por loco. A heterozigosidade observada, com média de 0,48, foi menor que a esperada em 10 locos. Foram observadas deficiências de heterozigotos em nove locos, o que resultou no desequilíbrio de Hardy-Weinberg para a população estudada. O conteúdo polimórfico informativo foi superior a 0,5 em 10 locos. O poder de discriminação foi >0,999 e as probabilidades de exclusão de paternidade quando são conhecidos os genótipos de um bezerro, sua mãe e um pai alegado, ou quando um ou outro genótipo parental não está disponível, para o conjunto de marcadores foram >0,999 e >0,989, respectivamente. O conjunto de 11 marcadores constitui método eficiente para a determinação de paternidade na raça Nelore.

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Section: Resultsunclassified

Diversidade genética e eficiência de DNA microssatélites para o controle genealógico da raça Nelore

Carneiro

Gonçalves

Schneider

et al. 2007

Arq. Bras. Med. Vet. Zootec.

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“…Further details on sample collection, DNA extraction and genotyping procedures can be found in previous publications (Martín-Burriel et al, 1999;Cañ on et al, 2001;Ginja et al, 2010a).…”

Section: Sampling and Genotypingmentioning

confidence: 99%

“…Both countries are characterised by a large number of local cattle breeds, most of which are considered threatened genetic resources. Although many of the breeds included in this study have been previously characterised genetically to some extent together with other breeds (Martín-Burriel et al, 1999;Cañ on et al, 2001;Mateus et al, 2004;Cymbron et al, 2005;Martín-Burriel et al, 2007;Ginja et al, 2010a), a comprehensive analysis of the genetic diversity present in the Iberian Peninsula and a source of important bovine genetic resources has never been made.…”

Section: Introductionmentioning

confidence: 99%

Relative breed contributions to neutral genetic diversity of a comprehensive representation of Iberian native cattle

Cañón

García

Delgado

et al. 2011

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This study is aimed at establishing priorities for the optimal conservation of genetic diversity among a comprehensive group of 40 cattle breeds from the Iberian Peninsula. Different sets of breed contributions to diversity were obtained with several methods that differ in the relative weight attributed to the within-and between-breed components of the genetic variation. The contributions to the Weitzman diversity and the expected heterozygosity (He) account for between-and within-breed variation only, respectively. Contributions to the core set obtained for several kinship matrices, incorporate both sources of variation, as well as the combined contributions of Ollivier and Foulley and those of Caballero and Toro. In general, breeds that ranked high in the different core set applications also ranked high in the contribution to the global He, for example, Sayaguesa, Retinta, Monchina, Berrenda en Colorado or Marismeñ a. As expected, the Weitzman method prioritised breeds with low contributions to the He, like Mallorquina, Menorquina, Berrenda en Negro, Mostrenca, Vaca Palmera or Mirandesa, all showing highly negative contributions to He -that is, their removal would significantly increase the average He. Weighing the within-and between-breed components with the F ST produced a balanced set of contributions in which all the breeds ranking high in both approaches show up. Unlike the other methods, the contributions to the diversity proposed by Caballero and Toro prioritised a good number of Portuguese breeds (Arouquesa, Barrosã , Mertolenga and Preta ranking highest), but this might be caused by a sample size effect. Only Sayaguesa ranked high in all the methods tested. Considerations with regard to the conservation scheme should be made before adopting any of these approaches: in situ v. cryoconservation, selection and adaptation within the breeds v. crossbreeding or the creation of synthetic breeds. There is no general consensus with regard to balancing within-and between-breed diversity and the decision of which source to favour will depend on the particular scenario. In addition to the genetic information, other factors, such as geographical, historical, economic, cultural, etc., also need to be considered in the formulation of a conservation plan. All these aspects will ultimately influence the distribution of resources by the decision-makers.

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“…MacHugh et al [28] analysed 20 microsatellites in different cattle populations from Africa, Europe, and Asia highlighting a marked distinction between humpless (taurine) and humped (zebu) cattle which provides strong support for the hypothesis of a separate origin of domesticated zebu cattle. Studies aimed at characterising relationships within the African group [45] or within the European group of cattle breeds have focused on breeds from Italy [10], Spain [32], Belgium [36], the British Isles [29], France [35], and Switzerland [42]. It is difficult, however, to group the data from these studies together in order to clarify the genetic relationships among the major types of cattle because they do not use a common set of microsatellites.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity measures of local European beef cattle breeds for conservation purposes

et al. 2001

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-This study was undertaken to determine the genetic structure, evolutionary relationships, and the genetic diversity among 18 local cattle breeds from Spain, Portugal, and France using 16 microsatellites. Heterozygosities, estimates of Fst, genetic distances, multivariate and diversity analyses, and assignment tests were performed. Heterozygosities ranged from 0.54 in the Pirenaica breed to 0.72 in the Barrosã breed. Seven percent of the total genetic variability can be attributed to differences among breeds (mean F st = 0.07; P < 0.01). Five different genetic distances were computed and compared with no correlation found to be significantly different from 0 between distances based on the effective size of the population and those which use the size of the alleles. The Weitzman recursive approach and a multivariate analysis were used to measure the contribution of the breeds diversity. The Weitzman approach suggests that the most important breeds to be preserved are those grouped into two clusters: the cluster formed by the Mirandesa and Alistana breeds and that of the Sayaguesa and Tudanca breeds. The hypothetical extinction of one of those clusters represents a 17% loss of diversity. A correspondence analysis not only distinguished four breed groups but also confirmed results of previous studies classifying the important breeds contributing to diversity. In addition, the variation between breeds was sufficiently high so as to allow individuals to be assigned to their breed of origin with a probability of 99% for simulated samples.local beef cattle breeds / microsatellite / genetic diversity

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Genetic diversity analysis of six Spanish native cattle breeds using microsatellites

Cited by 93 publications

References 25 publications

Diversidade genética e eficiência de DNA microssatélites para o controle genealógico da raça Nelore

Diversidade genética e eficiência de DNA microssatélites para o controle genealógico da raça Nelore

Relative breed contributions to neutral genetic diversity of a comprehensive representation of Iberian native cattle

Genetic diversity measures of local European beef cattle breeds for conservation purposes

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