The current situation in the Brassica juncea- Leptosphaeria maculans pathosystem and how future changes will be monitored
Canola quality Brassica juncea will be released for commercial production in Australia during 2007. Previous research has shown B. juncea is more resistant to the disease blackleg than commercially available Brassica napus cultivars. However, field surveys have found that B. juncea attacking blackleg isolates are already present in Australian blackleg populations. Consequently,the durability of B. juncea resistance is not known. This study will assess the change in blackleg population structure as a result of the introduction of B. juncea as a commercial crop in Australia.Blackleg disease pressure on B. juncea was present in all areas of the canola growing regions. The sites could be grouped into two different levels of disease pressure with the Merriwagga, Thuddungra and Wagga Wagga sites in the group showing the lower levels of blackleg disease pressure and all other sites in the group showing higher disease pressure. Mean levels of internal infection and external canker over all sites in B. juncea were found to be higher than the B. napus varieties. The individual sites at Coonamble, Frances and Tamworth showed significantly higher levels of internal infection within the B. juncea varieties than the B. napus varieties.
Blackleg Leptosphaeria maculans Brassica juncea
V.Thomas P.Salisbury R.Norton S.Marcroft
The University of Melbourne Joint Centre for Crop Innovation, Private Bag 260, Horsham, Victoria, 34 The University of Melbourne, Parkville, Victoria, 3010, Australia Marcroft Grains Pathology, Grains Innovation Park, 110 Natimuk road, Horsham, Victoria, 3400, Austra
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
1477-1480
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）