Germplasm release of root rot resistant, canola quality summer turnip rape (Brassica rapa L.)

摘要

A line of Brassica rapa with some resistance to brown girdling root rot, and with canola quality traits was developed and tested. This material is being made available as possible parental germplasm. Lines showing resistance to root rot were developed using three years of mass selection (1983-85) in a root rot nursery in Manitoba. The parent pool consisted of various accessions from China, selections from co-operative trials of the period, and cv Tobin planted every fourth row. From these, a singleline (R835-363) was selected on the basis of field evaluation for root rot resistance in Beaverlodge in 1986. Thirteen single plants from this line were grown in the greenhouse, the progeny seed was evaluated in the field for root rot resistance in 1989and 1990, and reserve seed of a single selection was retained as a resistant parent. The canola quality parent was AC Sunshine (Woods 1995).