影响甘蓝型油菜角果抗裂特性的因素分析

利用3个抗裂和4个易裂品种(系)分析了品种间、品种内单株间、单株内分枝间、主花序上的着生部位和角果相对含水量与抗裂角指数间的关系。结果表明,品种间抗裂角指数差异极显著,说明遗传特性是影响抗裂角性状的主要因素。品种内不同单株间抗裂角指数变异系数在15.81%～73.78%,但变异范围没有超出该品种的抗裂角特性。单株内不同着生部位影响抗裂角指数,不同品种分枝部位间角果抗裂角指数的变异范围在18.67%～93.57%。下部第一分枝的角果抗裂角指数大于其它部位角果,主花序顶部角果的抗裂角指数分别比主花序中部和下部角果小55.04%和60.43%。角果相对含水量对抗裂角指数的影响很大,油菜角果的抗裂角指数(y)随角果相对含水量(x)的增加呈直线上升的关系,即y=0.0149x-0.4779,R2为0.4284。上述各因素对抗裂角品种的影响远大于对易裂角品种的影响。

Factors analysis of silique shatter resistance in rapeseed(Brassica napus L.)

Influencing factors of silique shatter-resistance of rapeseed (Brassica napus L.) were analyzed using three shatter-resistant and four shatter-susceptible accessions. The factors included variation among accessions,single plants,branches,inflorescence position and silique's relative water content.Results indicated that silique shatter resistance indexes (SSRI) among accessions reached significant difference level.It indicated that the genetic features were main factors influencing SSRI. The coefficient of S...