Abstract
Gossypium mustelinum, one of five tetraploid species in the cotton genus, is geographically restricted to a few states in NE Brazil. Allozyme analysis was used to assess levels and patterns of genetic diversity inG. mustelinum and its relationship to the other tetraploid species. Genetic variation was low, with only 6 of 50 loci examined being polymorphic, a mean of 1.14 alleles per locus and a mean panmictic heterozygosity of 0.08. These estimates are low relative to other tetraploid cotton species, but are typical of island endemics. Interpopulational genetic identities were uniformly high, lending support to the concept of there being only one wild species of Brazilian cotton. The limited allelic diversity observed was correlated with geographical distribution, although variability is so limited in the species that geographically marginal populations are electrophoretically ordinary. Phylogenetic and phenetic analyses demonstrate thatG. mustelinum is isolated among polyploid cotton species, occupying one of the three basal clades resulting from an early radiation of polyploid taxa subsequent to polyploid formation. We suggest thatG. mustelinum represents a paleoendemic that presently exists as a series of widely scattered, relictual populations. Despite several centuries of sympatric cultivation ofG. barbadense andG. hirsutum, there was little evidence of interspecific introgression of alleles from cultivated cottons intoG. mustelinum.
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References
Aranha, C., Leitão, H. F., Gridi-Papp, I. L., 1969: Uma nova espécie para o gêneroGossypium L. — Bragantia28: 273–290.
Brubaker, C. L., Wendel, J. F., 1993: Molecular evidence bearing on the specific status ofGossypium lanceolatum Todaro. — Genet. Res. Crop Evol.40: 165–170.
Cavalli-Sforza, L. L., Edwards, A. W. F., 1967: Phylogenetic analysis: models and estimation procedures. — Evolution21: 550–570.
DeJoode, D. R., Wendel, J. F., 1992: Genetic diversity and origin of the Hawaiian Islands cotton,Gossypium tomentosum. — Amer. J. Bot.79: 1311–1319.
Endrizzi, J. E., Turcotte, E. L., Kohel, R. J., 1985: Genetics, cytology, and evolution ofGossypium. — Adv. Genet.23: 271–375.
Fryxell, P. A., 1976: A nomenclator ofGossypium: the botanical names of cotton. — US Dept Agric. Tech. Bull.1491: 1–114.
—, 1979: The natural history of the cotton tribe. — College Station, TX: Texas A & M University Press.
—, 1992: A revised taxonomic interpretation ofGossypium L. (Malvaceae). — Rheedea2: 108–165.
—, 1992: A revision ofGossypium sect.Grandicalyx (Malvaceae), including the description of six new species. — Syst. Bot.17: 91–114.
Hamrick, J. L., Godt, M. J. W., 1990: Allozyme diversity in plant species. — InBrown, A. H. D., Clegg, M. T., Kahler, A. L., Weir, B. S., (Eds): Plant population genetics, breeding and genetic resources, pp. 43–63. — Sunderland, MA: Sinauer.
Hutchinson, J. B., Silow, R. A., Stephens, S. G., 1947: The evolution ofGossypium. — London: Oxford University Press.
Kruckeberg, A. R., Rabinowitz, D., 1985: Biological aspects of endemism in higher plants. — Annu. Rev. Ecol. Syst.16: 447–479.
Nei, M., 1978: Estimation of average heterozygosity and genetic distance from a small number of individuals. — Genetics89: 583–590.
Percival, A. E., 1987: The national collection ofGossypium germplasm. — Southern Coop. Ser. Bull. 321, College Station, TX.
Percy, R. G., Wendel, J. F., 1990: Allozyme evidence for the origin and diversification ofGossypium barbadense L. — Theor. Appl. Genet.79: 529–542.
Pickersgill, B., Barrett, S. C. H., de Andrade-Lima, D., 1975: Wild cotton in Northeast Brazil. — Biotropica7: 42–54.
Roberty, G., 1950:Gossypiorum revisionis fentamen (fin). — Candollea13: 9–165.
Rogers, J. S., 1972: Measures of genetic similarity and genetic distance. — Studies in genetics. Univ. Texas Publ.7213: 145–153.
Stephens, S. G., 1967: Evolution under domestication of the New World cottons (Gossypium spp.). — Ciênc. Cult.19: 118–134.
Swofford, D. L., 1990: Phylogenetic analysis using parsimony. — Urbana: Illinois Natural History Survey.
Watt, G., 1907: The wild and cultivated cotton plants of the world. — London: Longmans, Green.
Wendel, J. F., Albert, V. A., 1992: Phylogenetics of the cotton genus (Gossypium L.): character-state weighted parsimony analysis of chloroplast DNA restriction site data and its systematic and biogeographic implications. — Syst. Bot.17: 115–143.
—, 1990: Allozyme diversity and introgression in the Galapagos endemicGossypium darwinii and its relationship to continentalG. barbadense. — Biochem. Syst. Ecol.18: 517–528.
—, 1989: Visualization and interpretation of plant isozymes. — InSoltis, D. E., Soltis, P. S., (Eds): Isozymes in plant biology, pp. 5–45. — Portland, OR: Dioscorides Press.
—, 1992: Genetic diversity inGossypium hirsutum and the origin of Upland cotton. — Amer. J. Bot.79: 1291–1310.
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Wendel, J.F., Rowley, R. & Stewart, J.M. Genetic diversity in and phylogenetic relationships of the Brazilian endemic cotton,Gossypium mustelinum (Malvaceae). Pl Syst Evol 192, 49–59 (1994). https://doi.org/10.1007/BF00985907
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DOI: https://doi.org/10.1007/BF00985907