Assessment of general and specific combining abilities in doubled haploid lines of rapeseed (Brassica napus L.)

Graphical abstract of the research. (a) The emerged embryos from microspore culture of rapeseed. (b) The cotyledonary microspore embryo. (c) Regenerated plantlets from microspore culture pathway. (d) Doubled haploid plants of rapeseed. (e) The top cross of obtained doubled haploids. (f) Germination of top cross progenies. (g) The top cross experiment and assess the general combining ability of doubled haploids in the field experiment. (h) The diallel cross of selected doubled haploids in green house. (i) Mature F1 diallel hybrids.