and, if counted, are provided separately from fertile achenes. Cytology: ploidy levels obtained from flow cytometry calculations are based on nuclear DNA
23 KB (1,822 words) - 12:48, 30 July 2020
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
8 KB (1,165 words) - 20:01, 7 June 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
7 KB (447 words) - 23:34, 29 July 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
16 KB (1,157 words) - 20:03, 7 June 2022
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
13 KB (1,045 words) - 12:06, 30 July 2020
species in every combination he tried, regardless of morphology and level of ploidy, including such improbable hybrids as D. blochmaniae × pulverulenta, crossing
13 KB (1,202 words) - 12:01, 30 July 2020
North Carolina, Virginia). All three ploidy levels occur in Florida, where the three varieties are most distinct. Ploidy level correlates with involucre height
10 KB (855 words) - 20:53, 29 July 2020
also be associated with the ploidy differences reported in Orobanche corymbosa (L. R. Heckard and T. I. Chuang 1975). Ploidy and morphological instability
11 KB (826 words) - 18:25, 29 July 2020
N. D., C. Sears, and E. Elle. 2011. Variation in floral morphology and ploidy among populations of Collinsia parviflora and Collinsia grandiflora. Botany
16 KB (737 words) - 18:04, 29 July 2020
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
14 KB (554 words) - 07:36, 30 July 2020
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;
7 KB (560 words) - 10:39, 30 July 2020
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
26 KB (2,400 words) - 14:31, 15 December 2020
some variation is apparent and is sometimes coincident with variability in ploidy level. In particular, in California and adjacent southwestern Oregon variability
8 KB (775 words) - 04:23, 30 July 2020
distinguished primarily by characteristics known to correlate with increases in ploidy level (such as spore size and the length of stomatal guard cells). Further
5 KB (465 words) - 23:26, 29 July 2020
(1976) found that major morphologic types coincide with three different ploidy levels. Most plants with fully pinnate leaves (five to nine leaflets in
17 KB (1,336 words) - 13:03, 30 July 2020
monophyletic groups in molecular phylogenetic analyses. All exhibit various ploidy levels, and Hygroamblystegium can be compared to a complex of agamospermous
9 KB (706 words) - 06:43, 30 July 2020
followed here. Semple and Bowers (1987) reported on the distribution of ploidy levels within the genus. In a preliminary cladistic study of the Chrysopsidinae
12 KB (845 words) - 20:52, 29 July 2020
nashii (4x, 6x), and R. virginica (2x, 4x), conspecific plants of different ploidy apparently occur sympatrically and are completely reproductively isolated
15 KB (925 words) - 20:04, 7 June 2022
vulgaris by M. Bollinger (1996). Odontites vulgaris differs from O. vernus in ploidy level, the latter being tetraploid (4n = 40), and by degree of branching
7 KB (685 words) - 18:27, 29 July 2020
evolution. Fortunately, a strong correlation between pollen morphology and ploidy level/reproductive mode facilitates the separation of sexual diploids from
73 KB (2,294 words) - 11:15, 30 July 2020