arranged by ploidy level, then by presumed genomic and phylogenetic order (H. Tobe et al. 1988; C. I. Peng 1988, 1989). Despite the different ploidy levels
6 KB (826 words) - 10:31, 9 May 2022
between species of the same ploidy level are apparently fertile with normal meiosis and spores, but those between different ploidy levels are sterile (J. G
5 KB (339 words) - 00:45, 17 December 2020
and, if counted, are provided separately from fertile achenes. Cytology: ploidy levels obtained from flow cytometry calculations are based on nuclear DNA
17 KB (1,817 words) - 22:54, 5 November 2020
diversity of reported chromosome numbers for North American taxa shows several ploidy shifts, even within some taxa. The exact patterns cannot be fully tracked
11 KB (1,157 words) - 22:52, 2 December 2022
North Carolina, Virginia). All three ploidy levels occur in Florida, where the three varieties are most distinct. Ploidy level correlates with involucre height
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differences and a higher ploidy level (2n = 88, 132) compared with the more inland var. pulchellum (2n = 44). Whether or not the ploidy level difference is
9 KB (819 words) - 17:16, 6 November 2020
species in every combination he tried, regardless of morphology and level of ploidy, including such improbable hybrids as D. blochmaniae × pulverulenta, crossing
10 KB (1,162 words) - 22:43, 5 November 2020
monophyletic groups in molecular phylogenetic analyses. All exhibit various ploidy levels, and Hygroamblystegium can be compared to a complex of agamospermous
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be hybridized, but the F1 plants are sterile when the parents differ in ploidy level. The F2 generation, when achieved, consists mainly of plants of low
11 KB (563 words) - 21:50, 5 November 2020
N. D., C. Sears, and E. Elle. 2011. Variation in floral morphology and ploidy among populations of Collinsia parviflora and Collinsia grandiflora. Botany
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also be associated with the ploidy differences reported in Orobanche corymbosa (L. R. Heckard and T. I. Chuang 1975). Ploidy and morphological instability
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thorn apple are used colloquially (see J. B. Phipps et al. 2003). Three ploidy levels (2x, 3x, and 4x) have been demonstrated in a wide range of North
21 KB (2,479 words) - 15:24, 9 December 2021
suspected that pollen diameter (volume) may be a useful surrogate to predict ploidy level in D. palustris. The bark of Dirca palustris is strong and pliable;
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of the C. gossypina complex documented, and the cytogeography of the four ploidy levels in C. mariana described (Semple 1977; Semple et al. 1980; Semple
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to A. odoratum subsp. alpinum (Á. Löve & D. Love) Hulten. Because the two ploidy levels can be distinguished only through cytological examination (Hedberg
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self-compatible. Ludwigia octovalvis is extremely variable in morphology and ploidy level, and the entire section is in need of taxonomic revision. None. Ludwigia
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(1976) found that major morphologic types coincide with three different ploidy levels. Most plants with fully pinnate leaves (five to nine leaflets in
12 KB (1,045 words) - 20:06, 25 January 2022
F. albicaulis, it is not known which ploidy level prevails in which of the varieties. Additional studies of ploidy levels in this complex might indicate
4 KB (364 words) - 13:16, 24 November 2024
nashii (4x, 6x), and R. virginica (2x, 4x), conspecific plants of different ploidy apparently occur sympatrically and are completely reproductively isolated
10 KB (750 words) - 22:44, 2 December 2022
followed here. Semple and Bowers (1987) reported on the distribution of ploidy levels within the genus. In a preliminary cladistic study of the Chrysopsidinae
8 KB (625 words) - 20:03, 5 November 2020