转基因抗矮花叶玉米对大白鼠骨髓细胞遗传毒性的影响

以SD大鼠为研究对象,研究了转基因抗矮花叶玉米和常规玉米对大白鼠骨髓细胞微核率与染色体畸变率的影响,以观察该转基因玉米对大白鼠可能产生的遗传毒理效应。实验结果表明:饲喂30%和50%转基因玉米日粮组的大白鼠骨髓细胞微核率和染色体畸变率与饲喂常规玉米相比均没有显著差异,而与阳性对照组之间存在极显著差异,这说明转基因玉米与常规玉米对大白鼠骨髓细胞均无遗传毒性。

怎样防治玉米矮花叶病

怎样防治玉米矮花叶病玉米矮花叶病又叫玉米黄绿条纹病，近年来在大名县呈上升发展趋势。据１９９５年８月１５日调查，感染玉米矮花叶病的病田率已达５０％以上，个别地块病株率高达８５％，亩减产４０～５０％，严重威胁着全县的玉米生产。玉米矮花叶病为害玉米植株大体...

Molecular Tagging of a New Resistance Gene to Maize Dwarf Mosaic Virus Using Microsatellite Markers

With joint analysis based on the parents, F 1, F 2 and backcrosses, the authors found that the resistance of the maize inbred line Huangzaosi to the maize dwarf mosaic virus strain B was conditioned by a major gene and polygene, and identified a new major gene. Bulked segregate and microsatellite analysis of a F 2 progeny from the combination of Huangzaosi×Mo17 were used to identify the resistance gene, mdm1(t), on the long arm of chromosome 6. This new resistance gene is tightly linked to and located between the microsatellite markers loci, phi077 and bnlg391. The linkage distances between phi077-mdm1(t) and mdm1(t)-bnlg391 are 4.74 centiMorgan (cM) and 6.72 cM respectively.

科学种植夏玉米

若要夏玉米高产,必须对夏玉米的综合栽培技术给予足够重视,现阐述几条重要措施,供农民朋友参考。 一、选择对路品种 我省南部夏播区玉米生育期内易受高温和大气干旱胁迫,加之近年玉米粗缩病及矮花叶病发生较重,影响产量的提高,因此,要加速品种更换。