Chromosome Numbers in Some Cacti of Western North America — IX

IF 2 4区生物学 Q2 PLANT SCIENCES Haseltonia Pub Date : 2018-01-01 DOI:10.2985/026.025.0103

M. Baker, D. Pinkava

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引用次数: 8

Abstract

Abstract: Chromosome numbers are determined for 524 individuals belonging to 107 taxa, including nothotaxa, within Cactaceae. Chromosome morphology was uniform within and among species. Nine unnamed nothotaxa and one previously named nothotaxon, Cylindropuntia ×vivipara, have chromosome numbers reported for the first time, and new chromosome numbers are reported for three taxa. Five putative Cylindropuntia hybrids are reported here for the first time: C. alcahes var. gigantensis × C. lindsayi, C. bernardina × C. echinocarpa, C. leptocaulis × C. ramosissima, C. echinocarpa × C. ramosissima, and C. echinocarpa × C. ganderi var. ganderi. Two putative Opuntia hybrids of less-certain origin are reported here: O. azurea var. discolor × O. rufida, and O. chlorotica × O. engelmannii. Two putative hybrids are reported for Echinocereus: E. arizonicus subsp. arizonicus × E. bonkerae subsp. bonkerae and E. coccineus subsp. coccineus × E. yavapaiensis. All chromosome number determinations reported to date are tabulated for Cylindropuntia, Grusonia, and selected taxa within Echinocereus. The significance of these data is discussed, including apparent correlations among polyploidy, subdioecy, sexual reproduction, and apomixis. We introduce six new combinations, one nothospecies designation, and a lectotypification for one taxon.

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北美西部一些仙人掌的染色体数目- 9

摘要/ Abstract摘要:对仙人掌科107个分类群(包括nothotaxa)的524个个体进行了染色体数目测定。染色体形态在种内和种间是一致的。9个未命名的notho分类群和1个已命名的notho分类群圆柱形属×vivipara首次报道了染色体数目，3个分类群报道了新的染色体数目。本文首次报道了5种柱头属植物的推测杂交品种，分别为:巨壶C. alcahes var. gigantensis × C. lindsayi、伯纳德C. bernardina × C. echinocarpa、细茎C. leptocaulis × C. ramosissima、针叶C. echinocarpa × C. ramosissima、针叶C. echinocarpa × C. ganderi var. ganderi。这里报道了两种来源不太确定的推测的机会花杂交种:O. azurea var. discolor × O. rufida和O. chlorotica × O. engelmannii。据报道，棘球蚴有两种可能的杂交体:亚利桑那棘球蚴亚种。黄鳝亚科;棘球绦虫和棘球绦虫亚种。yavapaiensis。所有的染色体数目测定报告到目前为止，表为圆柱纲，格鲁索尼亚，并在棘皮动物中选定的分类群。讨论了这些数据的意义，包括多倍体、亚雌雄异株、有性生殖和无融合之间的明显相关性。我们介绍了6个新的组合，1个新物种命名和1个分类单元的电分型。

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来源期刊

Haseltonia 生物-植物科学

CiteScore

3.00

自引率

6.70%

发文量

审稿时长

>12 weeks

期刊介绍： Haseltonia, Yearbook of the Cactus and Succulent Society of America, is published in full color and features peer-reviewed articles about all aspects of cacti, succulents and their environs. Topics include current research and conservation reports, new species descriptions and lengthy taxonomic revisions, historical and biographical notes, chemical and cytological studies, evolutionary biology and ethnobotanical reports, propagation and pest control methods, and pollinator studies. Serious students of the world''s succulent flora, botanists, taxonomists, researchers and horticulturalists will all find Haseltonia a valuable addition to their book collection.