Crossing scheme of hybridization and backcross between wild B. juncea and transgenic HR B. napus. Note: Combinations involved in this study are indicated as maternal plants × paternal plants. Plants in front of × are always maternal, and plants in the back of × are always paternal. ‘m’ denotes backcross progenies obtained with wild Brassica juncea as maternal plants. ‘p’ denotes backcross progenies obtained with wild Brassica juncea as paternal plants. ‘R’ denotes F₁ and backcross progenies with glyphosate-resistant gene. Abbreviation: BC = backcross generation.