Correlations Between Yield and Quality Characters of High-quality Hybrid Brassica napus Varieties

The correlations between yield and quality characters of Sanbei 98and Youyan 599(two high-quality hybrid Brassica napus varieties)was studied by the orthogonal rotation design to verify the effect of yield on quality characters in high-quality hybrid B.napus varieties.The results showed that:1) The variable coefficient of the erucic acid content and palmitic acid content was the biggest and the smallest respectively and the erucic acid content of Sanbei 98and Youyan 599was 0.90%and 1.24%separately;2) In the quality characters of different yield levels,there was significant difference in eicosenoic acid content in Sanbei 98and very significant difference in protein content in Youyan 599but there was no significant difference in different quality combination characters between the two varieties;3)The content of erucic acid and oil was negatively correlated to yield and the content of protein,linoleic acid,linolenic acid was positively correlated to yield but the correlation coefficients between glucosinolates,palmmitic acid,stearic acid,eicosenoic acid and yield were small;There were positive correlations between saturated fatty acid,total protein and fat content,total oleic acid and linoleic acid,index of unsaturated fatty acid,unsaturated fatty acid,ratio of total unsaturated fatty acid to total fatty acid content of erucic acid chain,.total 18-C fat acid and yield and negative correlation between total fat acid of erucic acid chain;4)When the yield of the same variety increased significantly,the content of erucic acid,oil and total fat acid of erucic acid chain presented a declining trend but the content of protein,linoleic acid,linolenic acid,total oleic acid and linoleic acid,saturated fatty acid,total fat acid and protein,index of unsaturated fatty acid,unsaturated fatty acid,total 18-C fat acid,ratio of total unsaturated fatty acid to total fatty acid content of erucic acid chain presented a rise trend.