Chromosome Numbers in Brazilian and Argentine Populations of Pfaffia glomerata (Amaranthaceae)
نویسندگان
چکیده
منابع مشابه
Meiotic behavior in tetraploid populations of Pfaffia tuberosa (Amaranthaceae)
Four populations of Pfaffia tuberosa, the Brazilian ginseng, collected in the central region of the state of Rio Grande do Sul (Brazil) were cytologically analyzed for meiotic behavior. All were tetraploid (2n = 4x = 68) and this condition could be observed through multiple chromosome pairing in pachytene and quadrivalent formation at diakinesis. Irregular chromosome segregation in both divisio...
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ATURAL populations of Drosophila are generally composed of complex arrays of different gene arrangements, but show a remarkable uniformity regarding the outward appearance of the flies. Therefore, color polymorphism is rare and chromosome polymorphism is common in this genus. Only a few species are either polymorphic with respect to externally visible traits or monomorphic with respect to gene ...
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Different ploidy levels, diploid (2n=2x=24) to hexaploid (2n=6x=72) have been reported for Acorus calamus, a perennial medicinal plant. According to available information, there is a significant relationship between the ploidy level and essential oil compositions and medicinal properties of this important genetic resource. However, there is no information about the chromosome number of A. calam...
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The present study reports the chromosome number and meiotic behaviour of 14 populationsbelonging to four taxa of Anchusa subgenus Buglossum Gusul. from Iran. All populationsshowed the chromosome number 2n= 4x= 32. It is the first meiotic study for A. subg.Buglossum. We discuss some habit form and evolutionary aspect in the light of cytogeneticdata. The origin of polyploidy (auto-allopolyploidy)...
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ژورنال
عنوان ژورنال: CYTOLOGIA
سال: 2003
ISSN: 0011-4545,1348-7019
DOI: 10.1508/cytologia.68.147