绿绒蒿属一新变种

报道了绿绒蒿属一新变种,即椭圆叶红花绿绒蒿(MeconopsispuniceaMaxim.var.ellipticaZ.J.Cui etY.Sh.Lian)。     

ROLE OF RICE VOLATILES IN THE FORAGING BEHAVIOUR OF CYRTORHINUS LIVIDIPENNIS REUTER

Abstract Experiments were conducted in laboratory to study the impacts of rice genotypes and nitrogen levels on the preference of the egg predator, Cyrtorhinus lividipennis , for eggs of brown planthopper(BPH), Nilaparvata lugens (Stal), and their relation to the rice volatiles. In two-choice tests, the female predators showed different preference for BPH eggs on different rice genotypes, but not for BPH eggs on rice plants treated with different levels of nitrogen. The olfactory response test revealed that more predator oriented to the odour from healthy rice plants compared with the plain air (control); the predator preferred BPH nymph-damaged plants to healthy plants, and BPH female adult-damaged plants to BPH nymph-damaged plants. The comparative studies between rice genotypes and nitrogen levels indicated that there were obvious differences in attractiveness to the predator between rice genotypes, while there was no significant difference between rice plants treated with different levels of nitrogen. The results showed that rice volatiles played an important role in mediating the foraging behaviour of C. lividipennis . Implications for augmenting the effectiveness of natural enemies by adjusting rice attributes and cultural practices are discussed.     

石竹一新变种

本文发表石竹一新变种:三脉石竹 Dianthus chinensis L. var.trinervis D.Q.Lu。     

黑龙江省北五味子一新变种

本文发表了黑龙江省产北五味子一新变种：白果五味子     

三株海洋木霉的应用潜力

【目的】探索3株海洋生境木霉的应用潜力。【方法】经过筛选和诱变,获得高抑菌活性及产孢量的木霉突变株;通过优化培养基、温度、初始p H考察其产孢量及最适培养条件;综合抑菌谱、重寄生及抑菌相关基因考察其抑菌活性;采用特殊培养基法考察其产纤维素酶、植酸酶、铁载体以及降解磷钾的能力,高效液相色谱法测定其产吲哚乙酸能力。【结果】3株木霉菌的产孢量分别为3.45×108、3.10×108和2.55×108 CFU/cm2,与野生型相比分别提高了88.52%、63.16%和180.22%;且均可产生厚垣孢子,其中XG20-1厚垣孢子产量最高,达到3.56×108 CFU/m L。3株木霉菌具有较广抑菌谱及对番茄早疫病菌的重寄生作用,同时扩增得到Tex1、Nag1、Eg1基因,生物学测试显示其均具有产纤维素酶、几丁质酶以及铁载体的能力,证明其抑菌活性是多种机制共同作用的结果;菌株可以降解磷钾,且吲哚乙酸产量分别为2.61、1.57和1.92 mg/L,具有促进植物生长的潜力。【结论】本文中3株木霉菌在开发为生防菌与生物肥料方面展现出良好的应用潜力。     

26个水稻新品种（系）对白叶枯病抗性的鉴定和评价

采用菲律宾10个代表菌株和我国V型菌代表菌株在植株的分蘖初期和孕穗期人工接种,鉴定和评价近年选育的26个“绿色超级稻”品种（系）对白叶枯病的抗性。结果表明多数品种在分蘖初期和孕穗期对病菌的抗感水平相同,少数品种接种在孕穗期接种部分菌株后的病斑长度小于苗期。此外,新黄占、华201S-1 和XF10450在分蘖初期和孕穗期接种10个菌株后的病斑长度均小于5cm,具有高度的广谱抗性;其它品种对不同菌株的抗性水平不同,黄华占、旱优113、新两优3411和天优145对4-5个菌株表现抗病,旱优75、旱优715和009067对测试的10-11个菌株高度感病;其它品系对所有菌株表现中度感病或感病。 关键词：水稻品种;白叶枯病;抗性     

甘肃小麦HMW—麦谷蛋白亚基遗传变异分析

对61份冬、春小麦品种的HMW—麦谷蛋白亚基分析,共检测到14种亚基和22种亚基组合,13份材料具有5 10亚基,2份具有2*亚基,2份具有14 15亚基,5份具有17 18亚基,5 10亚基在春小麦中出现的频率较冬小麦中高;品种HMW—麦谷蛋白亚基品质得分在4—12分之间,春小麦平均得分7．6,冬小麦平均得分6．6。结果表明：品种间GLu—1位点遗传变异差异大,亚基种类丰富,但优质亚基分布频率较低,品质评分较低,主要原因是其亲本含有优质亚基的比率太低。可见,丰富优质资源,提高小麦5 10亚基的分布频率是今后小麦品质育种的方向。     

水苏属一新变种

发表了水苏属一新变种,毛叶水苏(Stachys japonica Miq. var. tomentosa F. Z. Lie Z. Y. Sun)。