Reyes-Valdés, M. Humberto; Gómez-Martínez, Martha; García-Osuna, Hermila Trinidad
December 2000
Acta Botanica Mexicana;2000, Issue 53, p17
Academic Journal
In this research the chromosomes of Turbinicarpus valdezianus were studied in diakinesis and metaphase I, from native plants located near Saltillo, Coahuila (Mexico). A chromosome number 2n = 2 x = 22 was found, which is consistent with the basic number x = 11, previously reported for other members of the cactus family. The normal bivalent pairing observed in all the analyzed cells indicates that this is a diploid species with regular chromosome segregation. The analysis of meiotic configuration frequencies supports the hypothesis of one or more chromosome pairs being non-metacentric.


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