Quality of canola (Brassica napus L.) varieties in Western Canada: Evaluation of variability due to genetic, year and environmental conditions using data from Canadian Grain Commission Harvest Surveys and from Environment Canada meteorological stations
Quality data (oil content, crude protein content (as oil-free protein and seed protein), the sum ofoil and protein content and chlorophyll content) from Canadian Grain Commission harvest surveys coupled with meteorological data from Environment Canada (monthly minimum and maximum temperatures and monthly total precipitation by provincial crop district from 1992 to 2003) were used to evaluate quality factors for varieties of B. napus canola grown in Canada between 1992 and 2005. The analysis was restricted to the most popular varieties that appeared in the survey at least 3 years and for which there were at least 20 data points per year. Analysis of annual parameter means and overall variety ranks showed significant increases in protein content and oil plus protein content were noted in B. napus canola over the period but although oil content increased, the increase was not statistically significant. Chlorophyll content did not increase in harvest survey data but has increased in exports over the period.Statistically significant differences were found between varieties for all of the above parameters and a strong variety by location (province) effect. Sample variance within a variety was used as a rough measure of environmental sensitivity. There were significant genetic differences in the sample variance between varieties and in many cases this was consistent across years and locations. Significant correlations were noted for meteorological parameters for oil content (low temperatures in June), protein content (maximum temperatures in June and July), oil plus protein (minimum temperatures in August), chlorophyll (minimum temperatures in September) and there were significant variety differences in the responses (slopes) to these parameters. This suggests that it should be possible to design breeding strategies to develop varieties with greater or lesser sensitivity to environmental fluctuations.
quality environment variety oil protein chlorophyll temperature precipitation variability
James K.Daun
AgriAnalytical Consulting, 663 Beaverbrook St., Winnipeg, MB R3N 1N7 Canada
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
1596-1600
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）