Responsiveness in microspore cultures of some cultivars and Czech breeding materials of rapeseed (Brassica napus)

anther culture brassica napus cultivo de anteras cultivo in vitro culture in vitro culture techniques czech republic embriones vegetales f1 hybrids genotipos genotypes graine de colza haploidia haploidie haploidy hybride f1 in vitro culture plant embryos rapeseed semilla de colza technique de culture variedades varieties