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Pemberton JM, Albon SD, Guinness FE, Clutton-Brock TH, Berry RJ. GENETIC VARIATION AND JUVENILE SURVIVAL IN RED DEER. Evolution 2017; 42:921-934. [DOI: 10.1111/j.1558-5646.1988.tb02511.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/1987] [Accepted: 04/06/1988] [Indexed: 11/30/2022]
Affiliation(s)
- J. M. Pemberton
- Department of Zoology; University College London; Gower Street London WC1E 6BT U.K
| | - S. D. Albon
- Large Animal Research Group, Department of Zoology; University of Cambridge; Cambridge CB2 3EJ U.K
| | - F. E. Guinness
- Large Animal Research Group, Department of Zoology; University of Cambridge; Cambridge CB2 3EJ U.K
| | - T. H. Clutton-Brock
- Large Animal Research Group, Department of Zoology; University of Cambridge; Cambridge CB2 3EJ U.K
| | - R. J. Berry
- Department of Zoology; University College London; Gower Street London WC1E 6BT U.K
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Sharma R, Kumar B, Arora R, Ahlawat S, Mishra A, Tantia M. Genetic diversity estimates point to immediate efforts for conserving the endangered Tibetan sheep of India. Meta Gene 2016; 8:14-20. [PMID: 27014586 PMCID: PMC4792857 DOI: 10.1016/j.mgene.2016.01.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 11/26/2015] [Accepted: 01/04/2016] [Indexed: 11/24/2022] Open
Abstract
Tibetan is a valuable Himalayan sheep breed classified as endangered. Knowledge of the level and distribution of genetic diversity in Tibetan sheep is important for designing conservation strategies for their sustainable survival and to preserve their evolutionary potential. Thus, for the first time, genetic variability in the Tibetan population was accessed with twenty five inter-simple sequence repeat markers. All the microsatellites were polymorphic and a total of 148 alleles were detected across these loci. The observed number of alleles across all the loci was more than the effective number of alleles and ranged from 3 (BM6506) to 11 (BM6526) with 5.920 ± 0.387 mean number of alleles per locus. The average observed heterozygosity was less than the expected heterozygosity. The observed and expected heterozygosity values ranged from 0.150 (BM1314) to 0.9 (OarCP20) with an overall mean of 0.473 ± 0.044 and from 0.329 (BM8125) to 0.885 (BM6526) with an overall mean 0.672 ± 0.030, respectively. The lower heterozygosity pointed towards diminished genetic diversity in the population. Thirteen microsatellite loci exhibited significant (P < 0.05) departures from the Hardy-Weinberg proportions in the population. The estimate of heterozygote deficiency varied from - 0.443 (OarCP20) to 0.668 (OarFCB128) with a mean positive value of 0.302 ± 0.057. A normal 'L' shaped distribution of mode-shift test and non-significant heterozygote excess on the basis of different models suggested absence of recent bottleneck in the existing Tibetan population. In view of the declining population of Tibetan sheep (less than 250) in the breeding tract, need of the hour is immediate scientific management of the population so as to increase the population hand in hand with retaining the founder alleles to the maximum possible extent.
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Affiliation(s)
- Rekha Sharma
- National Bureau of Animal Genetic Resources, Karnal 132 001, India
| | - Brijesh Kumar
- ICAR Research Complex for NEH Region, Sikkim Centre, Gangtok 737102, India
| | - Reena Arora
- National Bureau of Animal Genetic Resources, Karnal 132 001, India
| | - Sonika Ahlawat
- National Bureau of Animal Genetic Resources, Karnal 132 001, India
| | - A.K. Mishra
- National Bureau of Animal Genetic Resources, Karnal 132 001, India
| | - M.S. Tantia
- National Bureau of Animal Genetic Resources, Karnal 132 001, India
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Awobajo OK, Salako AE, Osaiyuwu OH. Analysis of genetic structure of Nigerian West African Dwarf goats by microsatellite markers. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.09.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Preliminary analysis of microsatellite-based genetic diversity of goats in southern Nigeria. ACTA ACUST UNITED AC 2011. [DOI: 10.1017/s207863361100035x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Pandey AK, Sharma R, Singh Y, Mishra BP, Mondal KG, Singh PK, Singh G, Joshi BK. Variation of 18 STR loci in Shahabadi sheep of India. RUSS J GENET+ 2010. [DOI: 10.1134/s1022795410010138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Abstract
SUMMARYThe selection component analysis developed by Christiansen & Frydenberg (1973, 1976) is a method to study the components of natural selection and is based on an analysis of population samples which include mothers and their progeny (mother–offspring combinations). Because only one progeny per mother–offspring combination is analysed, gametic selection and the reproductive components of selection in males are poorly characterized. We investigated the information which can be gained by analysing all progeny in each combination and showed that analysis of entire litters enables detection of gametic selection. Testing and estimation procedures are derived for this purpose. Sexual selection in males and mate preferences remain poorly characterized because the only information about the reproductive components in males is contained in the sample of male gametes and is insufficient to reconstruct the breeding structure of the male population. The format and interpretation of a selection component analysis is presented which takes these results into account.
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CHRISTIANSEN FREDDYB, FRYDENBERG OVE, HJORTH JPETER, SIMONSEN VIBEKE. Genetics of Zoarces populations. Hereditas 2009. [DOI: 10.1111/j.1601-5223.1976.tb01589.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Simonsen V, Christiansen FB. Genetics of Zoarces populations. XIII. Three loci determining isoenzymes of glutamic-oxaloacetic transaminase. Hereditas 2008; 101:129-36. [PMID: 6520011 DOI: 10.1111/j.1601-5223.1984.tb00908.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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Siegismund HR. Genetic studies of Gammarus. IV. Selection component analysis of the Gpi and the Mpi loci in Gammarus oceanicus. Hereditas 2008; 102:241-50. [PMID: 4044277 DOI: 10.1111/j.1601-5223.1985.tb00622.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Simonsen V, Christiansen FB. Genetics of Zoarces populations. XIV. Variation of the lactate dehydrogenase isoenzymes. Hereditas 2008; 103:177-85. [PMID: 4086319 DOI: 10.1111/j.1601-5223.1985.tb00499.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Kumar D, Sharma R, Pandey AK, Gour DS, Malik G, Ahlawat SPS, Jain A. Genetic diversity and bottleneck analysis of Indian bellary sheep by microsatellite markers. RUSS J GENET+ 2007. [DOI: 10.1134/s1022795407090050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Gour DS, Malik G, Ahlawat S, Pandey A, Sharma R, Gupta N, Gupta S, Bisen P, Kumar D. Analysis of genetic structure of Jamunapari goats by microsatellite markers. Small Rumin Res 2006. [DOI: 10.1016/j.smallrumres.2005.07.053] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kumar D, Dixit S, Sharma R, Pandey A, Sirohi G, Patel A, Aggarwal R, Verma N, Gour DS, Ahlawat S. Population structure, genetic variation and management of Marwari goats. Small Rumin Res 2005. [DOI: 10.1016/j.smallrumres.2004.11.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Barker, Tan, Moore, Mukherjee, Matheson, Selvaraj. Genetic variation within and relationships among populations of Asian goats (Capra hircus). J Anim Breed Genet 2001. [DOI: 10.1046/j.1439-0388.2001.00296.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Essink K. Monitoring of mercury pollution in Dutch coastal waters by means of the teleostean fish zoarces viviparus. ACTA ACUST UNITED AC 1985. [DOI: 10.1016/0077-7579(85)90021-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Danford ND, Beardmore JA. Biochemical properties of esterase 6 in Drosophila melanogaster. Biochem Genet 1979; 17:1-22. [PMID: 110312 DOI: 10.1007/bf00484470] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Biochemical properties of esterase 6 in Drosophila melanogaster were investigated using partially purified preparations from three genotypes, 1/1, 1/2, and 2/2. The molecular weight of the enzyme is estimated to be about 90,000, and treatment with sodium dodecylsulfate cleaves the enzyme into four units with a molecular weight of about 22,000. The activity toward 28 naturally occurring esters was assayed and shown to vary considerably with substrate, the 1/1 preparation having in general higher activity than 1/2 and 2/2, which were very similar. Heat sensitivity, the effect of metal ions, and the effects of the presence or absence of an end product were also studied. The differences demonstrated between allozymes would allow considerable scope, under appropriate conditions, for differential selection to operate between genotypes.
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Population Genetics* *The authorship of this chapter is equal and alphabetical. ACTA ACUST UNITED AC 1979. [DOI: 10.1016/s1546-5098(08)60031-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Mating systems in porcellionid isopods: multiple paternity and sperm mixing in Porcellio scaber latr. Heredity (Edinb) 1978. [DOI: 10.1038/hdy.1978.109] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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Frydenberg O. In memoriam. Theor Popul Biol 1975. [DOI: 10.1016/0040-5809(75)90044-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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