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对甘蓝型油菜常规良种“宁油七号”(芥酸含量51.38％)与加拿大双低油菜品种“威斯特”(Westar,芥酸含量<1％)杂种F_2种子群体的主要脂肪酸含量间进行了相关与回归分析。结果表明,在导入无芥酸基因的杂种F_2群体中芥酸(C_(22:1))与廿碳烯酸(C_(20:1))含量呈正相关关系(r=0.4055,P<0.01),芥酸与油酸(C_(18:1))、亚油酸(C_(18:2))、亚麻酸(C_(18:3))含量间呈负相关关系(r=—0.9335、r=—0.7391,r=—0.3043,P均<0.01)。回归分析表明,芥酸含量的变化对油酸含量影响最大,回归系数(b)为—1.0103,对廿碳烯酸和亚油酸含量影响较小,b值分别为0.1842和—0.1453;而芥酸含量的变化对亚麻酸含量几乎无影响(b=—0.0306)。廿碳烯酸与油酸、亚油酸和亚麻酸含量间均呈负相关关系,相关系数达到1％显著水平。这一结果表明,芥酸、廿碳烯酸和油酸含量可能受同一基因系统控制。分析结果,油酸含量的变化对亚油酸和亚麻酸含量影响相当小(b值分别为0.1345和0.0197),而亚油酸与亚麻酸含量间呈正相关关系(r=0.50235,P<0.01,b=0.2572)。表明该群体中亚油酸和亚麻酸含量可能受一独立基因系统控制遗传。
The main fatty acid content of the hybrid F_2 seed population of the conventional elite “Ningyou No.7” (erucic acid content 51.38%) and Canadian canola variety “West” (erucic acid content <1%) was studied Correlation and regression analysis. The results showed that there was a positive correlation between erucic acid (C_ (22: 1)) and eicosenoic acid (C_ (20: 1)) in the F 2 population without erucic acid (r = 0.4055, , The content of erucic acid (C_ (18: 1), linoleic acid (C_ (18: 2)) and linolenic acid (C_ (18: 3)) was negatively correlated (r = -0.9335, r = -0.7391, r = -0.3043, P <0.01). Regression analysis showed that the change of erucic acid content had the greatest effect on the content of oleic acid. The regression coefficient (b) was -1.0103, which had little effect on the contents of eicosenoic acid and linoleic acid. The b values were 0.1842 and -0.1453, respectively. Changes in acid content had almost no effect on linolenic acid content (b = -0.0306). Eicosenoic acid and oleic acid, linoleic acid and linolenic acid content were negative correlation between the correlation coefficient reached 1% significant level. This result shows that erucic, eicosenoic and oleic acid contents may be controlled by the same gene system. The results showed that the changes of oleic acid content had a little effect on the content of linoleic acid and linolenic acid (b values were 0.1345 and 0.0197, respectively), while there was a positive correlation between linoleic acid and linolenic acid content (r = 0.50235, P <0.01, b = 0.2572). Indicating that linoleic and linolenic acid content in this population may be inherited by an independent genetic system.