Abstract
Gossypium mustelinum Miers ex Watt is a native from Northeastern Brazil and belongs to the primary gene pool of the cultivated cotton. The unique places where the species was known to occur were visited to plan ex situ and in situ preservation. Two populations at Caicó became extinct, and only eleven individuals were found. At Jaguarari, although one population became extinct, a new one was localized with approximately 500 adult plants, where a fence avoided cattle feeding. The population from Macururé consisted of 28 plants protected from animals by thorns of Bromelia laciniosa Mart. ex Schult. f. Thirteen SSR primer pairs amplified 40 alleles, among which 30% were exclusive of one of the populations. The genetic differences between populations represented 58.3% of the total genetic variation observed. The high genetic distances are likely to be caused by geographical isolation as well as by the small number of individuals which contribute to new generations, and consequential genetic drift.
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Acknowledgments
We thank MMA/PROBIO/CNPq, FINEPE and Ministry of Agriculture, Livestock and Food Supply for financial support. We are grateful to o Francisco Alves, Fábia Lima Pinto and José Nilton Dantos Henrique for technical assistance, and to Dr. Sona Jain for the revision of the manuscript. This work was conducted with Ibama authorization number 13973.
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Barroso, P.A.V., Hoffmann, L.V., de Freitas, R.B. et al. In situ conservation and genetic diversity of three populations of Gossypium mustelinum Miers ex Watt. Genet Resour Crop Evol 57, 343–349 (2010). https://doi.org/10.1007/s10722-009-9472-9
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DOI: https://doi.org/10.1007/s10722-009-9472-9