山葵(Wasabi japonica)种子发芽特性的研究

 研究了山葵种子的发芽特性及不同植物激素和化学药剂处理对其发芽的影响。结果表明，山葵种子在15 ℃下发芽率最高，20 ℃次之。6-BA、GA₃、BR处理可提高山葵种子发芽率，其中以6-BA处理效果最好。去除种皮可使山葵种子发芽率提高到98%，表明种皮对山葵种子发芽有抑制作用。     

香蕉分生小球体途径胚性细胞悬浮系的建立

 以7 个香蕉品种未成熟雄花为外植体均获得了分生小球体(meristematic globules) 。分生小球体的诱导率因基因组型和品种而异, 为15 %～81 % , 分生小球体的特点及开始出现的时间也受基因组型和品种的影响。以分生小球体为起始材料, 建立了‘广东2 号’、‘华农7 号’及‘河口龙牙’3 个品种的胚性细胞悬浮系, 并通过体胚发生途径获得了前两个品种的再生植株。     

芥蓝游离小孢子培养初报

 以芥蓝的5个基因型为试材，对游离小孢子培养诱导胚状体发生及植株再生进行了初步探讨。结果表明：供体基因型对成功诱导胚状体发生至关重要；振荡培养明显有利于胚状体的发育；改良MS和B培养基对诱导植株再生没有差别。     

植物生长物质的使用与绿色果品生产

 针对人们对植物生长物质的种种偏见，阐述了植物激素与动物激素以及植物生长调节剂的重要区别，提出了植物激素对人体无毒性，植物生长调节剂可以运用于大多数绿色果品生产的建议。     

铺散诸葛菜的组织培养及植株再生

 以铺散诸葛菜的叶柄及叶片为外植体, 研究了不同的再生方式。在6-BA 和NAA 配合使用的MS 培养基上, 叶柄和叶片外植体有高的成芽率, 具有强的器官再生能力。在2,4-D 与6-BA、NAA 结合的培养基上, 叶柄和叶片有较高的愈伤组织诱导率, 在含6-BA 的培养基上也易于分化。叶柄、叶片再生的芽和经愈伤组织分化而得来的芽快速繁殖后, 在生根培养基上形成完整植株。研究表明铺散诸葛菜具有极强的器官分化能力。     

菜豆新品种将军油豆的选育

将军油豆是以农家品种大马掌为母本 ,家雀蛋为父本人工杂交后系统选育而成。中熟 ,蔓生 ,从播种到采收 6 5d(天 ) ,生长势强 ,嫩荚绿色 ,扁条形 ,荚尖部有红条纹 ,平均荚长 2 0cm ,荚宽 2 .4cm ,单荚质量 2 4g ,纤维少 ,肉质面 ,属典型的东北优质油豆角类型。抗炭疽病、锈病 ,适应性广 ,春秋皆可种植 ,露地、保护地兼用     

Quantifying patch distribution at multiple spatial scales: Applications to wildlife-habitat models

Multiscale analyses are widely employed for wildlife-habitat studies. In most cases, however, each scale is considered discrete and little emphasis is placed on incorporating or measuring the responses of wildlife to resources across multiple scales. We modeled the responses of three Arctic wildlife species to vegetative resources distributed at two spatial scales: patches and collections of patches aggregated across a regional area. We defined a patch as a single or homogeneous collection of pixels representing 1 of 10 unique vegetation types. We employed a spatial pattern technique, three-term local quadrat variance, to quantify the distribution of patches at a larger regional scale. We used the distance at which the variance for each of 10 vegetation types peaked to define a moving window for calculating the density of patches. When measures of vegetation patch and density were applied to resource selection functions, the most parsimonious models for wolves and grizzly bears included covariates recorded at both scales. Seasonal resource selection by caribou was best described using a model consisting of only regional scale covariates. Our results suggest that for some species and environments simple patch-scale models may not capture the full range of spatial variation in resources to which wildlife may respond. For mobile animals that range across heterogeneous areas we recommend selection models that integrate resources occurring at a number of spatial scales. Patch density is a simple technique for representing such higher-order spatial patterns.     

专家系统在植保上的应用

专家系统在植保上主要应用于病虫害诊断、预测预报、决策管理等领域。植保专家的特点是应用范围广、实用性增强、新技术和新方法不断应用、有向综合性系统发展的趋势。文中还对植保专家系统存在的问题和发展对策进行了讨论。     

不同苜蓿品种对叶片愈伤组织诱导及植株再生的影响

以7个苜蓿品种叶片为外植体,采用3种诱导培养基、5种分化培养基,共15个组合,研究了不同品种间愈伤组织诱导及植株再生的差异。结果表明,不同苜蓿品种间植株再生率差异显著,超级13R在7个苜蓿品种中表现最佳。     

Genetic diversity and historic introgression in German Angler and Red Dual Purpose cattle and possibilities to reverse introgression

Recovering native uniqueness has major importance for breeds with historic introgression. The aim of the study was to estimate population genetic parameters for two local red cattle breeds from Northern Germany and to study possibilities to reverse introgression. Genealogical information consisted of 90,783 individuals for German Angler and 187,255 individuals for Red Dual-Purpose cattle breed, with additional information on sex, born, breed, status, and conventional breeding values. It is concluded that the native genetic contribution could be included as an additional trait in the total merit index in order to recover a part of the native genetic background. Native contributions should be estimated in the long term from marker data in order to account for Mendelian sampling. The maintenance of a sufficient genetic diversity of native alleles can be achieved by an advanced OCS with appropriate constraints.