Cytogenetic Characteristics of New Monosomic Stocks of Cotton (Gossypium hirsutum L.)

Table 3

Analyses of tetrads and pollen fertility in cotton primary monosomics (Mo) with reduced meiotic index.

Mo	Dose of irradiation, (Gy)	Microsporocytes			Pollen fertility
		Total number of microsporocytes	Meiotic index*	Tetrads with micronuclei, %	Total number of pollen grains	Fertility, %
Mo4	20	1777	68.32 ± 1.10	6.87 ± 0.60	475	93.47 ± 1.13
Mo6	20	1654	87.85 ± 0.80	2.48 ± 0.38	207	74.40 ± 3.03
Mo8	15	695	80.29 ± 1.51	2.01 ± 0.53	593	61.72 ± 2.00
Mo16	25	2110	76.07 ± 0.93	21.56 ± 0.90	185	5.43 ± 1.67
Mo21	15	2129	89.24 ± 0.67	5.87 ± 0.51	387	18.58 ± 1.98
Mo23	20	765	88.76 ± 1.14	8.37 ± 1.00	132	81.82 ± 3.36
Mo28	20	858	87.18 ± 1.14	2.10 ± 0.49	450	70.67 ± 2.15
Mo34	20	1981	88.54 ± 0.72	2.68 ± 0.36	358	46.23 ± 2.64
Mo37	20	1317	81.85 ± 1.06	0.91 ± 0.26	185	82.16 ± 2.81
Mo52	15	1326	89.00 ± 0.86	2.56 ± 0.43	135	72.60 ± 3.84
Mo57	15	2684	87.15 ± 0.65	3.95 ± 0.38	325	0
Mo74	15	2295	89.32 ± 0.64	4.44 ± 0.43	340	0
Mo88	27	972–1785	47.94 ± 1.60/95.52 ± 0.49	0.62 ± 0.25/0.22 ± 0.11	983	91.96 ± 0.87
Mo90	20	203–2068	12.32 ± 2.31–98.69 ± 0.25	6.90 ± 1.78–0	2326	93.98 ± 0.49
L-458	0	2190	95.11 ± 0.46	1.42 ± 0.25	3200	96.44 ± 0.33

L-458 is original parental (control) genotype; meiotic index is a percentage of normal tetrads in all sporad.