Table 3.

Frequency of meiotic abnormalities in the glyphosate- or glufosinate-tolerant fourth-generation progenies of the first backcross generation.

Stage	BC1mF4R		BC1pF4R		BC1mF4L		BC1pF4L
	NCO	F (%)	NCO	F (%)	NCO	F (%)	NCO	F (%)
MetaphaseI	842	28.76	692	44.57	1,291	62.16	1,465	44.63
AnaphaseI	573	11.90	784	27.07	661	60.36	736	64.52
TelophaseI	795	1.59	887	2.35	807	11.60	647	10.51
MetaphaseII	942	36.80	1,068	47.73	763	50.95	768	46.11
AnaphaseII	759	9.24	836	15.90	925	72.63	692	42.35
TelophaseII	1,054	3.77	1,100	2.93	935	21.13	980	14.61

NOC means the number of cells observed. F means the frequency of meiotic abnormalities.

BC1mF4R and BC1pF4R indicate the glyphosate-tolerant fourth-generation progenies of the first backcross generation (BC1) obtained from wild Brassica juncea × F1R or F1R × wild B. juncea, respectively. BC1mF4L and BC1pF4L indicate the glufosinate-tolerant fourth-generation progenies of the first backcross generation (BC1) obtained from wild Brassica juncea × F1L or F1L × wild B. juncea, respectively.

F1R and F1L indicate glyphosate- or glufosinate-tolerant F1 hybrids obtained from wild B. juncea × glyphosate- or glufosinate-tolerant transgenic oilseed rape. Progenitors in front of the × are always maternal plants, and progenitors after the × are always paternal plants.