甘蓝型油菜与白芥杂种后代抗裂角性及其与角果性状的相关性

摘要

为筛选抗裂角性优良的甘蓝型油菜种质资源,以甘蓝型油菜与白芥原生质体融合属间杂交后代为材料,扬油6号为对照,用随机碰撞法测定抗裂角性状.结果显示,抗裂角指数(SRI)变异范围为0.14～0.99,抗裂角指数SRI分布在0.1～0.2、0.2 ～0.3、0.3 ～0.4、0.4 ～0.5、0.5 ～0.6、0.6～0.7、0.8 ～0.9和0.9 ～1的材料数量分别为6、2、4、2、5、6、4和1份,表明材料之间的抗裂角性存在较大差异.筛选出12个抗裂角性优于扬油6号的种质.相关性分析表明,角果长度、果皮厚度和果皮重量与SRI呈显著正相关.因此在抗裂角油菜的筛选中,可以将长角果和厚重果皮作为形态指标.%To develop Brassica napus germplasm resources for mechanization breeding,hybrid progenies from B.napus and Sinapis alba were analyzed on silique shattering resistance,comparing with B.napus cv Yangyou 6.Random impact test demonstrated that silique shattering resistance index ranged from 0.14 to 0.99.The frequency distributions among the materials were 6,2,4,2,5,6,4 and 1,when the silique shattering resistance index was divided into 0.1-0.2,0.2-0.3,0.3-0.4,0.4-0.5,0.5-0.6,0.6-0.7,0.8-0.9 and 0.9-1 regions.It indicated wide variation in shattering resistance.Twelve lines demonstrated better resistance than Yangyou 6.Based on correlation analysis,the silique shattering resistance index had significant positive correlations with silique length,silique wall weight and thickness.Therefore,the long silique,thick and heavy silique wall could be used as auxiliary index to screen the silique-shatter-resistant rapeseed.