油菜蜀杂1号F_1(8208×S45A)及其亲本的核酸比较

用一种简便的方法,提取并纯化杂交油菜蜀杂1号F_1(8208×S45A)及其亲本的核酸,并比较它们的核酸含量及DNA的(G+C)％.结果表明,F_1(8208×S45A)的杂种优势与DNA和RNA的含量的增加有关,也与DNA的碱基组成变化有关.

早中熟杂优油菜蜀杂1号高产栽培措施数学模型初探

油菜产量的高低是受多因素综合作用的结果。为使蜀杂1号油菜产量有一个新的突破。用系统工程原理,采用正交旋转回归组合设计,对目前我县大面积示范的早中熟优质油菜蜀杂1号进行高产栽培综合农艺措施数学模型的研究,分析本试验栽培措施对其产量的影响,寻求措施的优化参数,以获得最佳农艺措施组合方案,为该品种的规范化高产栽培提供依据。

“蜀杂1号”的主要特性观察与应用

油菜是我县主要的油料作物,为了选择适宜我县生态条件下种植的高产、抗病、优质油菜新品种,我们对1990年从四川大学引进的甘蓝型低芥酸杂交油莱新品种“蜀杂1号”进行试种,表现较好,可供推广应用。

“蜀杂1号”油菜试种表现及利用前景

“蜀杂1号”油菜系四川大学生物工程系和四川省什邝县农业局采用核不育两用系育成的低芥酸杂交品种,1990年通过四川省农作物品种审定委员会审定定名。近年在我市进行了品比试验、大区对比和示范种植,表现出较好的适应性和丰产性。

Breeding of a Natural Colored-Cocoon Bombyx mori Variety Shuhuang No.1

[Objective] This study aimed to develop a new Bombyx mori variety Shuhuang No.1 and investigate its characteristics.[Method] The new variety was developed through cross breeding and pedigree separation.Its characteristics were identified by laboratory tests and rural promotion practices in Sichuan Province.[Result]The cocoon produced by the new variety Shuhuang No.1 was golden-yellow and radiantly beautiful.Shuhuang No.1 was strong and easy to rear,uniform in development.The male and female ones could be distinguished by their larval color and markings.The cocoon yield per 10 000 the 4th instar larvae reached 20.30 kg; the length of a cocoon filament was about 1 115.0 m,and a non-broken filament was 882.95 mm long,accounting for 79.15％ of the total length.The raw silk ratio of fresh cocoon was 18.39％,and the neatness was 91.25 point.The main economic features of Shuhuang No.1 were better than those of the control.[Conclusion] The new variety had been approved by Sichuan Silkworm Evaluation Commission.It can be promoted in parent silkworm rearing areas Sichuan,Chongqing,Yangtze River basin.