Acta Veterinaria et Zootechnica Sinica ›› 2022, Vol. 53 ›› Issue (7): 2035-2046.doi: 10.11843/j.issn.0366-6964.2022.07.001
• REVIEW • Previous Articles Next Articles
ZHANG Zhengkai1,2, LI Yefang2, YE Shaohui1, JIANG Lin2*, MA Yuehui1,2*
Received:
2021-11-24
Online:
2022-07-23
Published:
2022-07-23
CLC Number:
ZHANG Zhengkai, LI Yefang, YE Shaohui, JIANG Lin, MA Yuehui. Research Progress of Environmental Adaptability in Goats[J]. Acta Veterinaria et Zootechnica Sinica, 2022, 53(7): 2035-2046.
[1] | ERWIN D H.Climate as a driver of evolutionary change[J].Curr Biol,2009,19(14):R575-R583. |
[2] | GARCIA R A,CABEZA M,RAHBEK C,et al.Multiple dimensions of climate change and their implications for biodiversity[J].Science,2014,344(6183):1247579. |
[3] | TERÉS J,BUSOMS S,MARTÍN L P,et al.Soil carbonate drives local adaptation in Arabidopsis thaliana[J].Plant Cell Environ, 2019, 42(8):2384-2398. |
[4] | TYRMI J S,VUOSKU J,ACOSTA J J,et al.Genomics of Clinal local adaptation in Pinus sylvestris under continuous environmental and spatial genetic setting[J].G3(Bethesda),2020,10(8):2683-2696. |
[5] | MWACHARO J M,KIM E S,ELBELTAGY A R,et al.Genomic footprints of dryland stress adaptation in Egyptian fat-tail sheep and their divergence from East African and western Asia cohorts[J].Sci Rep,2017,7(1):17647. |
[6] | WITT K E,HUERTA-SÁNCHEZ E.Convergent evolution in human and domesticate adaptation to high-altitude environments[J].Philos Trans R Soc Lond B Biol Sci,2019,374(1777):20180235. |
[7] | DALY K G,DELSER P M,MULLIN V E,et al.Ancient goat genomes reveal mosaic domestication in the Fertile Crescent[J]. Science,2018,361(6397):85-88. |
[8] | LI X,YANG J,SHEN M,et al.Whole-genome resequencing of wild and domestic sheep identifies genes associated with morphological and agronomic traits[J].Nat Commun,2020,11(1):2815. |
[9] | FRANTZ L A F,HAILE J,LIN A T,et al.Ancient pigs reveal a near-complete genomic turnover following their introduction to Europe[J].Proc Natl Acad Sci U S A,2019,116(35):17231-17238. |
[10] | QIU Q,WANG L Z,WANG K,et al.Yak whole-genome resequencing reveals domestication signatures and prehistoric population expansions[J].Nat Commun,2015,6:10283. |
[11] | LIU X X,ZHANG Y L,LI Y F,et al.EPAS1 gain-of-function mutation contributes to high-altitude adaptation in Tibetan horses[J].Mol Biol Evol,2019,36(11):2591-2603. |
[12] | MCHUGO G P,DOVER M J,MACHUGH D E.Unlocking the origins and biology of domestic animals using ancient DNA and paleogenomics[J].BMC Biol,2019,17(1):98. |
[13] | EVENO E,COLLADA C,GUEVARA M A,et al. "Contrasting patterns of selection at Pinus pinaster Ait. Drought stress candidate genes as revealed by genetic differentiation analyses"[J].Mol Biol Evol,2008,25(2):417-437. |
[14] | HOBAN S,KELLEY J L,LOTTERHOS K E,et al.Finding the genomic basis of local adaptation:pitfalls,practical solutions,and future directions[J].Am Nat,2016,188(4):379-397. |
[15] | RELLSTAB C,GUGERLI F,ECKERT A J,et al.A practical guide to environmental association analysis in landscape genomics[J].Mol Ecol,2015,24(17):4348-4370. |
[16] | LV F H,AGHA S,KANTANEN J,et al.Adaptations to climate-mediated selective pressures in sheep[J].Mol Biol Evol, 2014, 31(12):3324-3343. |
[17] | SORK V L.Genomic studies of local adaptation in natural plant populations[J].J Hered,2017,109(1):3-15. |
[18] | FITZPATRICK M C,KELLER S R.Ecological genomics meets community-level modelling of biodiversity:mapping the genomic landscape of current and future environmental adaptation[J].Ecol Lett,2015,18(1):1-16. |
[19] | ZEDER M A.Domestication and early agriculture in the Mediterranean Basin:origins,diffusion,and impact[J].Proc Natl Acad Sci U S A,2008,105(33):11597-11604. |
[20] | PIDANCIER N,JORDAN S,LUIKART G,et al.Evolutionary history of the genus Capra (Mammalia,Artiodactyla):discordance between mitochondrial DNA and Y-chromosome phylogenies[J].Mol Phylogenet Evol,2006,40(3):739-749. |
[21] | AMILLS M,CAPOTE J,TOSSER-KLOPP G.Goat domestication and breeding:a jigsaw of historical,biological and molecular data with missing pieces[J].Anim Genet,2017,48(6):631-644. |
[22] | GILBERT M,NICOLAS G,CINARDI G,et al.Global distribution data for cattle,buffaloes,horses,sheep,goats,pigs,chickens and ducks in 2010[J].Sci Data,2018,5:180227. |
[23] | NAIR M R R,SEJIAN V,SILPA M V,et al.Goat as the ideal climate-resilient animal model in tropical environment:revisiting advantages over other livestock species[J].Int J Biometeorol,2021,65(12):2229-2240. |
[24] | ZHANG M H,DUNSHEA F R,WARNER R D,et al.Impacts of heat stress on meat quality and strategies for amelioration:a review[J].Int J Biometeorol,2020,64(9):1613-1628. |
[25] | CAO Y H,XU S S,SHEN M,et al.Historical introgression from wild relatives enhanced climatic adaptation and resistance to pneumonia in sheep[J].Mol Biol Evol,2021,38(3):838-855. |
[26] | 国家生态科学数据中心[Z].2019.National Ecosystem Science Data Center[Z].2019.(in Chinese) |
[27] | 资源环境科学与数据中心[Z]. Resource and Environment Science and Data Center[Z].(in Chinese) |
[28] | WorldClim[Z]. |
[29] | VAN DIJK E L,AUGER H,JASZCZYSZYN Y,et al.Ten years of next-generation sequencing technology[J].Trends Genet,2014,30(9):418-426. |
[30] | WORLEY K C.A golden goat genome[J].Nat Genet,2017,49(4):485-486. |
[31] | MANEL S,HOLDEREGGER R.Ten years of landscape genetics[J].Trends Ecol Evol,2013,28(10):614-621. |
[32] | MANEL S,ANDRELLO M,HENRY K,et al.Predicting genotype environmental range from genome-environment associations[J].Mol Ecol,2018,27(13):2823-2833. |
[33] | LI X,GUO T T,MU Q,et al.Genomic and environmental determinants and their interplay underlying phenotypic plasticity[J].Proc Natl Acad Sci U S A,2018,115(26):6679-6684. |
[34] | MANEL S,PERRIER C,PRATLONG M,et al.Genomic resources and their influence on the detection of the signal of positive selection in genome scans[J].Mol Ecol,2016,25(1):170-184. |
[35] | FOLL M,GAGGIOTTI O.A genome-scan method to identify selected loci appropriate for both dominant and codominant markers:a Bayesian perspective[J].Genetics,2008,180(2):977-993. |
[36] | BONHOMME M,CHEVALET C,SERVIN B,et al.Detecting selection in population trees:the Lewontin and Krakauer test extended[J].Genetics,2010,186(1):241-262. |
[37] | YANG J,LI W R,LV F H,et al.Whole-genome sequencing of native sheep provides insights into rapid adaptations to extreme environments[J].Mol Biol Evol,2016,33(10):2576-2592. |
[38] | GHEYAS A A,VALLEJO-TRUJILLO A,KEBEDE A,et al.Integrated environmental and genomic analysis reveals the drivers of local adaptation in African indigenous chickens[J].Mol Biol Evol,2021,38(10):4268-4285. |
[39] | DE MITA S,THUILLET A C,GAY L,et al.Detecting selection along environmental gradients:analysis of eight methods and their effectiveness for outbreeding and selfing populations[J].Mol Ecol,2013,22(5):1383-1399. |
[40] | JOOST S,BONIN A,BRUFORD M W,et al.A spatial analysis method (SAM) to detect candidate loci for selection:towards a landscape genomics approach to adaptation[J].Mol Ecol,2007,16(18):3955-3969. |
[41] | JOOST S,KALBERMATTEN M,BONIN A.Spatial analysis method (SAM):a software tool combining molecular and environmental data to identify candidate loci for selection[J].Mol Ecol Resour,2008,8(5):957-960. |
[42] | DURUZ S,SEVANE N,SELMONI O,et al.Rapid identification and interpretation of gene-environment associations using the new R.SamBada landscape genomics pipeline[J].Mol Ecol Resour,2019,19(5):1355-1365. |
[43] | STUCKI S,OROZCO-TERWENGEL P,FORESTER B R,et al.High performance computation of landscape genomic models including local indicators of spatial association[J].Mol Ecol Resour,2017,17(5):1072-1089. |
[44] | OKSANEN J,BLANCHET F G,FRIENDLY M,et al.vegan:community Ecology Package.Ordination methods,diversity analysis and other functions for community and vegetation ecologists.Version 2.5-7[Z].2020. |
[45] | BLANCO-PASTOR J L,BARRE P,KEEP T,et al.Canonical correlations reveal adaptive loci and phenotypic responses to climate in perennial ryegrass[J].Mol Ecol Resour,2021,21(3):849-870. |
[46] | MOSCA E,ECKERT A J,DI PIERRO E A,et al.The geographical and environmental determinants of genetic diversity for four alpine conifers of the European Alps[J].Mol Ecol,2012,21(22):5530-5545. |
[47] | CAPBLANCQ T,LUU K,BLUM M,et al.Evaluation of redundancy analysis to identify signatures of local adaptation[J].Mol Ecol Resour,2018,18(6):1223-1233. |
[48] | LASKY J R,DES MARAIS D L,LOWRY D B,et al.Natural variation in abiotic stress responsive gene expression and local adaptation to climate in Arabidopsis thaliana[J].Mol Biol Evol,2014,31(9):2283-2296. |
[49] | MDLADLA K,DZOMBA E F,MUCHADEYI F C.Landscape genomics and pathway analysis to understand genetic adaptation of South African indigenous goat populations[J].Heredity (Edinb),2018,120(4):369-378. |
[50] | FRICHOT E,SCHOVILLE S D,BOUCHARD G,et al.Testing for associations between loci and environmental gradients using latent factor mixed models[J].Mol Biol Evol,2013,30(7):1687-1699. |
[51] | SERRANITO B,TAURISSON-MOURET D,HARKAT S,et al.Search for selection signatures related to trypanosomosis tolerance in African goats[J].Front Genet,2021,12:715732. |
[52] | GAIN C,FRANÇOIS O.LEA 3:factor models in population genetics and ecological genomics with R[J].Mol Ecol Resour, 2021, 21(8):2738-2748. |
[53] | CAYE K,JUMENTIER B,LEPEULE J,et al.LFMM 2:fast and accurate inference of gene-environment associations in genome-wide studies[J].Mol Biol Evol,2019,36(4):852-860. |
[54] | BEALL C M.Two routes to functional adaptation:Tibetan and Andean high-altitude natives[J].Proc Natl Acad Sci U S A,2007,104 Suppl 1(Suppl 1):8655-8660. |
[55] | WEST J B.Early history of high-altitude physiology[J].Ann N Y Acad Sci,2016,1365(1):33-42. |
[56] | LUKS A M,SWENSON E R,BARTSCH P.Acute high-altitude sickness[J].Eur Respir Rev,2017,26(143):160096. |
[57] | SIMONSON T S,YANG Y Z,HUFF C D,et al.Genetic evidence for high-altitude adaptation in Tibet[J].Science, 2010, 329(5987):72-75. |
[58] | ZHANG W P,FAN Z X,HAN E J,et al.Hypoxia adaptations in the grey wolf (Canis lupus chanco) from Qinghai-Tibet Plateau[J].PLoS Genet,2014,10(7):e1004466. |
[59] | 张天留,高雪,徐凌洋,等.高原家养动物环境适应性的研究进展[J].畜牧兽医学报,2020,51(7):1475-1487.ZHANG T L,GAO X,XU L Y,et al.Research progress on environment adaptation of plateau domestic animals[J].Acta Veterinaria et Zootechnica Sinica,2020,51(7):1475-1487.(in Chinese) |
[60] | WANG X L,LIU J,ZHOU G X,et al.Whole-genome sequencing of eight goat populations for the detection of selection signatures underlying production and adaptive traits[J].Sci Rep,2016,6:38932. |
[61] | GUO J Z,TAO H X,LI P F,et al.Whole-genome sequencing reveals selection signatures associated with important traits in six goat breeds[J].Sci Rep,2018,8(1):10405. |
[62] | SONG S,YAO N,YANG M,et al.Exome sequencing reveals genetic differentiation due to high-altitude adaptation in the Tibetan cashmere goat (Capra hircus)[J].BMC Genomics,2016,17:122. |
[63] | LORENZO F R,HUFF C,MYLLYMÄKI M,et al.A genetic mechanism for Tibetan high-altitude adaptation[J].Nat Genet,2014,46(9):951-956. |
[64] | GOU X,WANG Z,LI N,et al.Whole-genome sequencing of six dog breeds from continuous altitudes reveals adaptation to high-altitude hypoxia[J].Genome Res,2014,24(8):1308-1315. |
[65] | WU D D,YANG C P,WANG M S,et al.Convergent genomic signatures of high-altitude adaptation among domestic mammals[J].Natl Sci Rev,2020,7(6):952-963. |
[66] | BERMAN A.Invited review:are adaptations present to support dairy cattle productivity in warm climates?[J].J Dairy Sci,2011, 94(5):2147-2158. |
[67] | BERNABUCCI U,BIFFANI S,BUGGIOTTI L,et al.The effects of heat stress in Italian Holstein dairy cattle[J].J Dairy Sci,2014,97(1):471-486. |
[68] | KOCH F,THOM U,ALBRECHT E,et al.Heat stress directly impairs gut integrity and recruits distinct immune cell populations into the bovine intestine[J].Proc Natl Acad Sci U S A,2019,116(21):10333-10338. |
[69] | SILVA P S,HOOPER H B,MANICA E,et al.Heat stress affects the expression of key genes in the placenta,placental characteristics,and efficiency of Saanen goats and the survival and growth of their kids[J].J Dairy Sci,2021,104(4):4970-4979. |
[70] | GUO J Z,ZHONG J,LI L,et al.Comparative genome analyses reveal the unique genetic composition and selection signals underlying the phenotypic characteristics of three Chinese domestic goat breeds[J].Genet Sel Evol,2019,51:70. |
[71] | GONZALEZ-RIVAS P A,CHAUHAN S S,HA M,et al.Effects of heat stress on animal physiology,metabolism,and meat quality:a review[J].Meat Sci,2020,162:108025. |
[72] | BENJELLOUN B,ALBERTO F J,STREETER I,et al.Characterizing neutral genomic diversity and selection signatures in indigenous populations of Moroccan goats (Capra hircus) using WGS data[J].Front Genet,2015,6:107. |
[73] | KIM E S,ELBELTAGY A R,ABOUL-NAGA A M,et al.Multiple genomic signatures of selection in goats and sheep indigenous to a hot arid environment[J].Heredity (Edinb),2016,116(3):255-264. |
[74] | BRITO L F,KIJAS J W,VENTURA R V,et al.Genetic diversity and signatures of selection in various goat breeds revealed by genome-wide SNP markers[J].BMC Genomics,2017,18(1):229. |
[75] | BERTOLINI F,SERVIN B,TALENTI A,et al.Signatures of selection and environmental adaptation across the goat genome post-domestication[J].Genet Sel Evol,2018,50(1):57. |
[76] | GEERTS S,OSAER S,GOOSSENS B,et al.Trypanotolerance in small ruminants of sub-Saharan Africa[J].Trends Parasitol, 2009, 25(3):132-138. |
[77] | GUTIERREZ C,CORBERA J A,MORALES M,et al.Trypanosomosis in goats:current status[J].Ann N Y Acad Sci,2006, 1081:300-310. |
[78] | LUO N J,WANG J,HU Y,et al.Cold and heat climatic variations reduce indigenous goat birth weight and enhance pre-weaning mortality in subtropical monsoon region of China[J].Trop Anim Health Prod,2020,52(3):1385-1394. |
[79] | DO PRADO PAIM T,BORGES B O,DE MELLO T L P,et al.Thermographic evaluation of climatic conditions on lambs from different genetic groups[J].Int J Biometeorol,2013,57(1):59-66. |
[80] | WANG F H,ZHANG L,GONG G,et al.Genome-wide association study of fleece traits in Inner Mongolia Cashmere goats[J].Anim Genet,2021,52(3):375-379. |
[81] | BURREN A,NEUDITSCHKO M,SIGNER-HASLER H,et al.Genetic diversity analyses reveal first insights into breed-specific selection signatures within Swiss goat breeds[J].Anim Genet,2016,47(6):727-739. |
[82] | GUERRERO A I,ROGERS T L.From low to high latitudes:changes in fatty acid desaturation in mammalian fat tissue suggest a thermoregulatory role[J].BMC Evol Biol,2019,19(1):155. |
[83] | VIRTANEN K A,LIDELL M E,ORAVA J,et al.Functional brown adipose tissue in healthy adults[J].N Engl J Med,2009, 360(15):1518-1525. |
[84] | VAN MARKEN LICHTENBELT W D,VANHOMMERIG J W,SMULDERS N M,et al.Cold-activated brown adipose tissue in healthy men[J].N Engl J Med,2009,360(15):1500-1508. |
[85] | FULLER-JACKSON J P,HENRY B A.Adipose and skeletal muscle thermogenesis:studies from large animals[J].J Endocrinol,2018,237(3):R99-R115. |
[86] | WANG L J,CHEN X Y,SONG T Z,et al.Using RNA-Seq to identify reference genes of the transition from brown to white adipose tissue in goats[J].Animals,2020,10(9):1626. |
[87] | LI X K,SU R,WAN W T,et al.Identification of selection signals by large-scale whole-genome resequencing of cashmere goats[J].Sci Rep,2017,7(1):15142. |
[88] | SELEIMAN M F,AL-SUHAIBANI N,ALI N,et al.Drought stress impacts on plants and different approaches to alleviate its adverse effects[J].Plants (Basel),2021,10(2):259. |
[89] | CORTELLARI M,BARBATO M,TALENTI A,et al.The climatic and genetic heritage of Italian goat breeds with genomic SNP data[J].Sci Rep,2021,11(1):10986. |
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