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

Table 1

The origin of the cotton primary monosomics from cytogenetic collection developed in Uzbekistan (radiation).

Dose of irradiation (Gy)	Number of primary monosomics*			Monosomic lines**
	M1	M2	M3
Irradiation of seeds by thermal neutrons
15	3	1	0	—
25	0	1	0	—
27	0	1	2	Mo1
35	1	2	0	Mo56, Mo62
Total	4	4	2	3
Irradiation of pollen by gamma rays
10	5	4	2	Mo10, Mo39, Mo40, Mo50, Mo81, Mo82
15	4	9	1	Mo3, Mo31, Mo53
20	11	8	3	Mo4, Mo7, Mo11, Mo22, Mo27, Mo28, Mo34, Mo35, Mo36, Mo66, Mo75, Mo89
25	14	3	0	Mo9, Mo13, Mo15, Mo16, Mo17, Mo19, Mo38, Mo46, Mo48, Mo76, Mo77
Total	34	24	6	32

*A total number of primary monosomics in Table 1 is 74 that were developed using thermal neutron (10 monosomics) and gamma ray (64 monosomics) treatments. Remaining 18 primary monosomics were developed from desynaptic plants that were shown in Table 2. **From these 74 primary monosomics developed using irradiation, 34 monosomic lines were developed, and this number does not reflect the fertility or transmission ability of primary monosomics.