激素对黑莓‘Kiowa’叶片愈伤组织诱导的影响

以黑莓品种‘Kiowa’无菌苗的叶片为外植体,研究了外源生长调节剂对愈伤组织诱导的影响。结果表明:不同激素种类、浓度及其配比诱导‘Kiowa’的叶片都可以产生愈伤组织,并且诱导率都为100%,但愈伤组织的状态和生长量有显著差异。其中添加2,4-D产生的愈伤组织质量较好,生长素和细胞分裂素组合使用时有抑制愈伤组织诱导的作用;添加1.0 mg/L 2,4-D的MS培养基诱导的愈伤组织多,质地疏松,呈嫩黄色颗粒状。     

建溪流域常绿阔叶防护林优势树种生态相似关系研究——Ⅰ.主要乔木种群生态相似关系研究

对建溪流域常绿阔叶防护林群落的３０个主要优势乔木种群进行生态相似关系的研究。结果表明：组成建溪流域常绿阔叶防护林的乔木种群大部分为狭生态位,对资源的共享性不明显。种群之间的生态相似性比例和生态位重叠指数指标值反映了亚热带常绿阔叶林的生态特征。     

两系杂交稻新组合两优277高产制种技术

两优277(YW-2S/双七)是湖北省农科院粮作所育成的两系杂交晚籼组合,2004年通过湖北省品种审定。根据两优277父母本的特征特性及3 a制种实践,总结了其高产制种技术。     

Study on Biological Control Of Rhizoctonia solani via Trichoderma

Strain T02-25 was selected from approximately 30 rhizosphere isolates of Trichoderma species isolated from roots of crops. Its biological activity against Rhizoctonia solani was determined for the control efficacy to pepper seedling blight caused by R. solani in the field. The assay methods were treating R. solani sclerotia by Trichoderma conidial suspension (106cfu ml-1) and scattering Thichoderma rice bran over the pepper root medium. The results showed that T02-25 was active against R. solani in both ways, and its control efficacy was 82.7% and 78.0%, respectively. In addition to comparison of the efficacy of the two application methods, the relationship of different factors in the control efficacy of Trichoderma against R. solani was discussed.     

S351－1西瓜雄性不育的研究初报

对新发现的西瓜Ｓ３５１－１雄性不育材料的植物学特征的观察及遗传特性的研究表明，西瓜〔Ｃｉｔｒｕｌｕｓｌａｎａｔｕｓ（Ｔｈｕｎｂ．）Ｍａｔｓｕｍ＆Ｎａｋａｉ〕Ｓ３５１－１雄性不育材料的花药小而皱缩，始终不产生花粉。其不育性为一对隐性核基因所控制，育性分离稳定，自身农艺性状良好。该材料的发现拓宽了西瓜雄性不育种质资源群体