Kučera V., Vyvadilová M., Klíma M.
Abstract
The possibility of using Shaan 2A cytoplasmic male sterility (CMS) system for breeding domestic rapeseed hybrids was
verified. Three reliable male sterile lines with low glucosinolate (GSL) content were derived from the original high
GSL Chinese materials by six times repeated backcrossing with donors of 00 characters. Four relevant fertility
restorers (Rf) were also improved by means of crossing with quality donors and additional development of doubled
haploids (DH). The experimental three-way hybrids were produced using CMS lines crossed with the cultivar Californium
as the sterile mother components and subsequently with DH Rf lines. The yield and agronomic performance of the five
hybrids tested in three-location trials were comparable with high performance line and hybrid cultivars.
Key words:
oilseed rape, hybrid breeding, CMS Shaan 2A, doubled haploids, experimental hybrids