Pedigree analyses of the Zatorska goose population

Graczyk, Magdalena; Andres, Krzysztof; Kapkowska, E.; Szwaczkowski, T.

doi:10.17221/8560-cjas

Cited by 11 publications

(14 citation statements)

References 18 publications

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“…In pedigreed endangered‐maintained Zatorska geese typically one male from 20 ancestor lines is mated with six females and 20% of them are 1‐year‐old females and the rest 2–4 years old (Graczyk et al . ). More detailed information about the breeding population and conservation program applied were described by Graczyk et al .…”

Section: Methodsmentioning

confidence: 97%

“…More detailed information about the breeding population and conservation program applied were described by Graczyk et al . (, ). Three traits were analyzed: fertility, embryo mortality and hatchability.…”

Section: Methodsmentioning

confidence: 99%

“…In this case, the completeness of the pedigree plays a crucial role (Graczyk et al . ). Reproductive potential is affected by many genetic and non‐genetic factors, which can be divided to four groups: bird, nutrition, egg and incubation (King'ori ).…”

Section: Introductionmentioning

confidence: 97%

“…The number of individuals recommended by the Food and Agriculture Organization should be not less than 50–100 animals in each generation to keep the genetic diversity at the appropriative level (Graczyk et al . ). The main problem in small closed populations is the increase of the inbreeding rate and causes inbreeding depression, which is defined as the reduction of the biological fitness of a given population.…”

Section: Introductionmentioning

confidence: 97%

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Genetic evaluation of reproductive potential in the Zatorska goose under a conservation program

Graczyk

Andres²,

Kapkowska³

et al. 2018

Animal Science Journal

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The aim of this study was to estimate the genetic parameters and inbreeding effect on the fertility, embryo mortality and hatchability traits in the Zatorska goose covered by the animal genetic resources conservation program. The material for this study contains information about results of hatching of 18 863 eggs from 721 dams and 168 sires, laid between 1998-2015. Genetic parameters were estimated based on the threshold animal model by the use of Restricted Maximum Likelihood and Gibbs sampling. The percentage of fertilized eggs ranged yearly between 37-80%. The percentage of embryo mortality was very low, ranging between 4.63-23.73%. The percentage of the hatched goslings from the total number of analyzed eggs was on average 33.18%, and 53.72% from fertilized eggs. On average based on both methods, the heritability estimates of the fertility, embryo mortality and hatchability reached 0.36, 0.07, 0.24 for males and 0.44, 0.11, 0.32 for females. The genetic trend had increasing tendency for fertility and hatchability and was stable for embryo mortality for both sexes. The obtained result shows that the Zatorska goose can be still maintained in the reserves of the local gene pool according to current rules and use in the local market as a breed with good reproductive potential.

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Section: Methodsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Genetic evaluation of reproductive potential in the Zatorska goose under a conservation program

Graczyk

Andres²,

Kapkowska³

et al. 2018

Animal Science Journal

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“…However, this does not have to be true. Crucial genes that control species-specific characteristics (e.g., leaf size and trifoliate leaf) must be homologous so that the individual can be classified as a member of the species [39]. Kinship may overestimate genetic diversity because of unaccounted relationships due to the lack of bookkeeping when recording crosses.…”

Section: Diversity Of Trifolium Accessionsmentioning

confidence: 99%

Pedigree analysis of pre-breeding efforts in Trifolium spp. germplasm in New Zealand

et al. 2020

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Background Prebreeding in plants is the activity designed to identify useful characteristics from wild germplasm and its integration in breeding programs. Prebreeding aims to introduce new variation into the populations of a species of interest. Pedigree analysis is a valuable tool for evaluation of variation in genebanks where pedigree maps are used to visualize and describe population structure and variation within these populations. Margot Forde Germplasm Centre (MFGC) is New Zealand’s national forage genebank and holds a collection of ~ 75 species of the genus Trifolium, of which only a dozen have been taken through prebreeding programs. The main objective of this study was to construct pedigree maps and analyse patterns of relatedness for seven minor Trifolium species accessions contained at the MFGC. These species are Trifolium ambiguum, Trifolium arvense, Trifolium dubium, Trifolium hybridum, Trifolium medium, Trifolium subterraneum and the Trifolium repens x Trifolium occidentale interspecific hybrids. We present a history of Trifolium spp. prebreeding in New Zealand and inform breeders of possible alternative forage species to use. Results Pedigree data from accessions introduced between 1950 and 2016 were used and filtered based on breeding activity. Kinship levels among Trifolium spp. remained below 8% and no inbreeding was found. Influential ancestors that contributed largely to populations structure were identified. The Australian cultivar ‘Monaro’ had a strong influence over the whole population of accessions in T. ambiguum. T. subterraneum and T. repens x T. occidentale had the largest number of generations (3). T. ambiguum and T. medium had the highest cumulative kinship across the decades. Conclusions We conclude that there are high levels of diversity in the seven Trifolium spp. studied. However, collection and prebreeding efforts must be strengthened to maximize utilization and bring useful genetic variation.

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Population structure of Mazandaran native fowls using pedigree analysis

Gholizadeh

2017

Trop Anim Health Prod

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The objective of this study was to use pedigree analysis to evaluate the population structure and genetic variability of the Mazandaran native fowls in Iran by quantifying the pedigree completeness index, effective population size, genetic diversity, inbreeding level, and individual increase in inbreeding. The pedigree completeness analysis showed 3.31 full, 10.19 maximum, and 6.30 equivalent generations. The effective number of founders (f ) was 131, representing 5% of the potential number of founders. The effective number of ancestors (f) was 81, and the genetic contribution of the 37 most influent ancestors explained 50% of the genetic variability in the population. The ratio f /f (effective number of founders/effective number of ancestors), which expresses the effect of population bottlenecks, was 1.62. The inbreeding coefficient increased over generations and the average was 1.93%. The average relatedness coefficient between individuals of the population was estimated to be 2.59%. The effective population size, based on the number of full generations, was 56. Family size analysis showed that fewer males than females were used, resulting in the observed levels of inbreeding. Average inbreeding coefficient in the Mazandaran native fowls can be regarded to be below critical levels. However, considering the relationship coefficients of individuals is recommended to aid maintaining genetic diversity of Mazandaran native fowls.

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Pedigree analyses of the Zatorska goose population

Cited by 11 publications

References 18 publications

Genetic evaluation of reproductive potential in the Zatorska goose under a conservation program

Genetic evaluation of reproductive potential in the Zatorska goose under a conservation program

Pedigree analysis of pre-breeding efforts in Trifolium spp. germplasm in New Zealand

Population structure of Mazandaran native fowls using pedigree analysis

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