Karyotype (2n) and allozymc divrrsity at 37 gene loci \vrrc determined in ti9 subterrmean tilde rats in Turkry helongirig to the two supcrspccics: the ancestor Spa1n.x lur~rudorr (11 = 55; 20 populations) and the descendant S. t~/rierrhqr (11 = 14; liwr populations). \Ve idciitificd remarkable variation rif diploid clirnmos~itii~ niniil)rrs in the S. Ieucodirrr suprrspccics: 2n = :18. 10. 50, 3, 60 and 62: and in thr S. ulrrenhtrg? supersprcirs: 2rr = 52. 56 and 58. Genrtic diversity indices were low 011 average in Imth S. Itirrridon and ,S. ehrtnbrrp supcrspccirs: Allrle diversity, . 4 = 1.081 and 1.074; polymorphism. F5Y; = 0.077 and 0.068; hctcroqgosity. II = 0.038 ;nid 0.027; and gcnc diversity, H, = 0.038 and 0.034, rrspeclivcly. H ranged from 0 in nirsir or srmimcsic rc+ns to 0.088 in arid Anatolia.W c considrr the populations with dilterent diploid chr(imr)some nuinhers, 2n. as good thloqical spccies. Kar);ot)pic diversity may tnark rxtcnsivc ecological speciation. Nei's grnctic distances. I ) (average 0.174, range 0.002 0.422) and ecngeographical criteria suqyst that a l~n~s t e;ich popitlation may rrprcsriit a diferrnt biological species, but c-ritiral ruturc trsting is necessary to support this claim. Kalyot)prs and allozymes are ti on ran do nil^ distlihutcd across 'l'urkey. displaying rcinar-kahle correlations \s\ith climatic and biotic Factors. Both 2rr and H are significantly correlated with aridity stress (2n/rainlill, r, = -0.74; P < 0.001), and in our regon also with climatic unpredictahility.Thrsc results support the niche-width genetic \ariatinu l~ypotl~csis in space and time. Climatic selection in 'I'urkey appears to he a inajor architect of kai7otype and genetic ~allozymc) diversity and divcrgcncc in mcik rat cv(iIiitioii, i n both speciation and adaptation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.