Table 2.

Morphometric data concerning the karyotype of tetraploid Cenchrus ciliaris individuals. R = 0.9; AsI % = 47.89; s, short arm; l, long arm; c, total chromosome length; l/s, ratio of long and short arms; i, centromeric index = 100 x s/(l+s); m, metacentric chromosome type (according to Levan et al. 1964); R = the ratio of the longest to the shortest chromosome pair (according to Stebbins 1971); AsI % = (å L / å L+S) x 100 (according to Arano and Saito 1980); SD, standard deviation.

Chromosome pair	s (µm)	l (µm)	c (µm)	(l/s)	i	Chromosome type
1	1.64 (0.15) SD	1.79 (0.12)	3.43	1.09	47.92	m
2	1.54 (0.18)	1.72 (0.12)	3.27	1.12	47.27	m
3	1.46 (0.20)	1.77 (0.11)	3.23	1.21	45.30	m
4	1.48 (0.19)	1.65 (0.14)	3.13	1.11	47.29	m
5	1.42 (0.17)	1.64 (0.13)	3.06	1.16	46.36	m
6	1.42 (0.17)	1.62 (0.12)	3.04	1.14	46.76	m
7	1.34 (0.17)	1.60 (0.13)	2.94	1.19	45.59	m
8	1.34 (0.18)	1.50 (0.12)	2.84	1.12	47.17	m
9	1.21 (0.17)	1.54 (0.14)	2.75	1.26	44.16	m
10	1.17 (0.16)	1.46 (0.13)	2.63	1.24	44.56	m
11	1.13 (0.18)	1.38 (0.09)	2.51	1.23	44.84	m
12	1.13 (0.11)	1.31 (0.09)	2.44	1.17	46.15	m
13	1.05 (0.12)	1.27 (0.10)	2.32	1.20	45.38	m
14	1.04 (0.11)	1.26 (0.09)	2.29	1.22	45.14	m
15	1.01 (0.13)	1.15 (0.13)	2.16	1.14	46.69	m
16	0.98 (0.13)	1.09 (0.12)	2.07	1.11	47.41	m
17	0.91 (0.15)	1.05 (0.11)	1.96	1.16	46.36	m
18	0.84 (0.10)	0.98 (0.12)	1.82	1.17	46.08	m