Karyomorphological Studies in Some Species of Parnassia L. (Saxifragaceae s.l.) in East Asia and Intraspecific Polyploidy of P. palustris L.

Table 3

Karyotype characters in 14 species of Parnassia observed here.

Species	Chromosome number (2𝑛)	Chromosome length (μm)				Form
		Longest ± SD	Shortest ± SD	Total ± SD	Average ± SD
P. yunnanensis var. longistipitata	32	1.6±0.1	1.0±0	38.6±1.1	1.21±0.08	m
P. scaposa var. yushuensis	18	2.8±0.3	1.9±0.2	41.2±3.8	2.29±0.21	m + sm
P. aff. cacuminum f.yushuensis	18	2.3±0.1	1.5±0	33.0±0.9	1.83±0.07	m
P. oreophyla	18	2.8±0.2	1.8±0.2	40.6±3.2	2.26±0.27	m + sm
	36	2.8±0.3	1.8±0.2	78.5±4.1	2.13±0.16	m + sm
P. trinervis	18	2.7±0.2	2.1±0.1	42.5±2.9	2.36±0.19	m + sm
P. viridiflora	18	2.0±0.1	1.6±0.1	30.7±1.2	1.71±0.11	m + sm
	36	2.1±0.2	1.4±0.1	61.1±1.8	1.70±0.09	m + sm
P. laxmannii	18	2.3±0.3	1.6±0.1	34.9±1.7	1.94±0.1	m
P. brevistyla	14	3.6±0.7	2.7±0.4	43.4±3.3	3.10±0.25	m + sm
P. delavayi	14	4.3±0.8	3.2±0.4	52.5±3.6	3.75±0.31	m + sm
P. alpicola	18	2.6±0.1	1.9±0.1	39.7±0.9	2.21±0.18	m + sm
P. bifolia	36	2.5±0.2	1.6±0.1	71.4±2.8	1.98±0.08	m + sm
P. wightiana	14	2.3±0.2	1.4±0.1	26.7±1.0	1.91±0.11	m + sm + st
P. foliosa	18	2.8±0.3	1.9±0.2	39.5±2.8	2.19±0.13	m + sm
P. palustris	18	2.7±0.2	1.9±0.1	41.8±3.4	2.32±0.18	m + sm
	27	2.8±0.2	1.9±0.1	61.2±3.9	2.27±0.15	m + sm
	36	2.8±0.2	1.9±0.1	81.4±5.3	2.27±0.13	m + sm
	45	2.7±0.1	1.8±0	99.4±2.5	2.21±0.07	m + sm

SD: standard deviation; m: median-centromeric chromosome; sm: submedian-centromeric chromosome; st: subterminal-centromeric chromosome.