Abstract:对无色叶缘无色稃尖的籼型材料与宜ＤＳ（无色叶缘紫色稃尖）杂交Ｆ１及Ｆ２稃尖和叶缘颜色的调查结果分析表明，紫色稃尖对无色稃为显性，符合１对基因控制的遗传模式；控制叶缘颜色的２对基因中的其中１对可能为稃尖色泽控制基因，另外，本试验进一步确证认为籼、粳不同类型的材料在控制叶缘颜色的遗传基础上存在差异，其中叶缘无色的粳型材料中不存在显性互补基因。

Abstract:Heredity groups were classified by cluster analysis with RAPD technology based on 20 rice varieties of hyogo prefecture of Japan. 11 primers, A 02 , A 08 , B 18 , C 15 , D 03 , D 08 , G 05 , M 11 , Q 16 , S 13 and T 06 , selected from 220 candidate primers act as polymorphic DNA (RAPD) makers for 20 rice. The maps of RAPD standard polymorphic DNA in different varieties can be established by their specific characteristic bands. Thus, the cultivars and their purity could be identified and analysed quickly. In addition, Genetic distance among 20 rice varieties was calculated and clustered with RAPD makers. The results showed that 20 rice varieties could be classified into four groups. The four groups classified by cluster analysis with RAPD technology is consistent with the expected grouping based on available pedigree. The current study indicated that it was practical to group rice with RAPD technology.

Abstract:研究了番茄单倍体减数分裂过程中染色体的行为。结果表明，番茄单倍体减数分裂不同步。在中期Ⅰ和中期Ⅱ，绝大部分细胞的染色体聚集在赤道板上，其中少数细胞的个别梁色体散乱在赤道板外；中期Ⅱ二赤道板交叉、紧贴细胞边缘。后期Ⅰ、后期Ⅱ形成染色体桥、断片及落后染色体；染色体在两级分布不均衡；分成染色单体孢子体以四分孢子为主，部分有微核，也有少量单分及多分孢子。９７．４％花粉不能萌发，植株高度不育。

Abstract:将紫光芒果（Ｍａｎｇｉｆｅｒａ ｉｎｄｉｃａ Ｌ．ｃｖ．Ｚｉｈｕａ）置于１５℃低温中贮藏７ｄ进行低温锻炼，然后于２℃中贮藏，结果表明：低温锻炼处理提高了低温贮藏中芒果果皮ＣＡＴ和ＳＯＤ的活性，延缓了ＭＤＡ含量的增加和细胞膜透性的增大，显著提高了芒果的抗冷害能力，延长了芒果低温贮藏的寿命。

Abstract:通过对贵州和国内部分省区的野生果树物种资源的调查研究表明：贵州省野生果树物种资源丰富，共有４２科、８０属、２８０种及１６变种。这些野生果树主要集中在蔷薇科、壳斗科、桑科、猕猴桃科、葡萄科、芸香科和越桔科。贵州省野生果树物种资源在各地区分布不平衡，黔西南、黔南、黔东南和铜仁地区较丰富，而贵阳、遵义、安顺和六盘水地区较贫乏。各地区野生果树物种资源的相似系数表明，黔东南地区与铜仁地区的野生果树物种资源最

Abstract:在ＧＩＳ技术支持下，应用土地资源评价的原理和方法，采用指数和法对广东省斗门县土地资源进行评价，划分为５个不同的质量等级，统计其面积并绘制土地资源评价图，对不同级别的土地资源进行分析。结果表明：采用指数和法划出斗门县耕地资源（包括Ⅰ、Ⅱ等地）共４１ ４１８ ．７３ｈｍ＾２，约占全县土地总面积６２％。其中，Ⅰ等地主要是质量中上的水稻土和菜地，约占耕地面积的７３％；Ⅱ等地主要是中低产用，其数量约占全县耕地

Abstract:报道了非洲山毛豆（Ｔｅｐｈｒｏｓｉａ ｖｏｇｅｌｉｉ Ｈｏｏｋ）丙酮提取物对菜青虫（ｐｉｅｒｉｓ ｒａｐａｅ Ｌ．）、斜纹夜蛾（Ｓｐｏｄｏｐｔｅｒａ ｌｉｔｕｒａ Ｆａｂｒｉｃｉｕｓ）、粘虫（Ｍｙｔｈｉｍｎａ ｓｅｐａｒａｔａ Ｗａｌｋｅｒ）、小菜蛾（Ｐｌｕｔｅｌｌａ ｘｙｌｏｓｔｅｌｌａ Ｌ．）等害虫的拒食作用。选择性拒食作用中，非洲山毛豆叶丙酮提取以植物干粉０．２ｇ．ｍＬ处理时，对５龄菜青虫的

Abstract:Eight pathogen fungi in Pachira macrocarpa (Cham. et. Schlecht.) Walp. in Guangzhou were identified, which included Phomopsis macrocarpae P. G. Xi, Z. D. Jiang et P. K. Chi sp. nov., Phomopsis durionis H. Syd., Botryodiplodia theobromae Pat., Colletotrichum gloeosporioides (Penz.) Sacc., Pestalotiopsis gracilis (Kleb.) Stey., Trichothecium roseum Lk. ex Fr., Curvularia lunata (Walk.) Boed. and Alternaria tenuissima ( Fr.) Wiltsh.. The description in Latin and figure of the new species were given in the paper. The type specimens are deposited in the Fungal Collection of South China Agricultural University. Two diseases of them, leaf spot by Phomopsis durionis and stem rot by Botryodiplodia theobromae , occurred widely and severely.

Abstract:用吡虫啉对台湾乳白蚁进行室内毒效试验和林间毒土屏障试验表明：室内用ｗ为０．０５％的吡虫啉即可在６ｄ内全部杀死白蚁；林间毒土屏障试验用ｗ为０．０５％～２．００％吡虫啉处理过的土壤，１ａ后观察发现台湾乳白蚁完全不能穿透，而用ｗ为０．０５％的毒死蜱处理过的土壤全部被白蚁穿透，并且松木块遭受严重取食，林间同浓度比较试验，吡虫啉所需浓度比毒死蜱低。

Abstract:Three new species of fungi on Philodendron spp. were identificated during systematic investigation of the fungal disease on Araceae carried out from 1997 to 1999 in Guangzhou area. The funngi were Phomopsis philodendri Z.D.Jiang ,X.H.Zheng et P.K.Chi n. sp., Sphaeropsis philodendri X.H.Zheng et P.K.Chi n. sp. and Alternaria philodendri X. H. Zheng et P. K. Chi n. sp.. The type specimens were deposited in Mycological Herbarium of South China Agricultural University.

Abstract:The present paper gives a brief review of the larvae of Henosepilachna Li, provided with the key to Chinese species.Three larvae species was described : H. libera (Dieke), H. pusillanima (Mulsant) and H. septima (Dieke). The larvae specimens are deposited in the Insects Collection of Nanjing Agricultural University.

Abstract:A new species of the genus Trichogramma Westwood collected in the egg of the diamondback moth, Plutella xylostella L., in Shenzhen, Guangdong Province was recorded in the paper. All the type specimens are deposited in the Laboratory of Insect Ecology, South China Agricultural University.

Abstract:The observation on the structure of protocorm of Cymidium sinense shows that inner structures of protocorm and rosette protocorm are similar although their outer forms are different. Buds occur on the protocom and node and end of rosette protocom. Embryoid like structure is formed by shoot apical meristem and root apical meristem and it is similar with seed embryo. According to development and structure, protocom and rosette protocom is considered as a vegetative propagational organ. In addition, the large crystal cells can be observed in the leaf primordia of Cymidium sinense .

Abstract:The suspension roselle cell was used to study the effects of inoculum amount and sucrose concentration on its growth. The results were as follows: the bigger the inoculum amount was, the faster the roselle cell started to grow, but the smaller the specific growth rate was. From these facts, the density dependent of cell starting to grow and density inhibited of cell growth were proposed; Sucrose was limiting substrate from 2% to 4%; But from 4% to higher concentration, the sucrose showed inhibition effect on cell growth. The dual effects of sucrose on cell growth were apparently seen from the utilization of nutrients ,such as sugar and nitrate.

Abstract:混交林在不同阶段应采取不同的调整措施，相对稳定期（０～４ａ）以局部松土除草为宜，竞争初期（５～１０ａ）采取块状透光伐，伐除强度为３０％，竞争盛期（１０ａ以上）则采用疏伐的方法。疏伐是混交林种间关系调整的重要措施，疏伐有利于促进混交林的生长，增强林分的光合作用强度，提高群落的生物多性样。

Abstract:根据新版国际植物命名法规（１９９４，东京）规定，凡在１９５８年１月１日以后发表的新分类群如同时指出２个模式者，不算构成合格和合法发表。现查中国植物志已出版的被子植物科中有１２个种群是以２个模式标本发表的，属不合法种名。为了符合国际植物命名法规规定，本文特将这些不符合法规的种群重新确认其主模式（ｈｏｌｏｔｙｐｅ），并给予合格和合法发表。

Abstract:２８日龄的断奶仔猪３９头随机分为３组，每组１３头，Ⅰ组为对照组，每周每头颈部皮下注射１．０ｍＬ ＰＢＳ。Ⅱ组、Ⅲ级分别注射１．０ｍＬ不同浓度的猪胰多肽粗品，剂量分别为２、４ｍｇ／ｋｇ，观察猪胰多肽粗品对断奶仔猪生长、血清中总蛋白、白蛋白和球蛋白浓度的影响。结果表明：（１）试验结束时，各组间仔猪体增重无明显差异，但用猪胰多肽粗品处理的Ⅱ－Ⅲ组仔猪的料重比均低于对照组。（２）各组血清总蛋白含量随日龄增

Abstract:报道了猪饥饿及喂饲后 5min单剂量 (2 0mg/kg)内服氟甲砜霉素的药动学比较的研究 .用高效液相色谱法测定血药浓度 .试验所得的血浆浓度 时间数据采用非房室模型统计矩原理分析处理 .猪饥饿后内服给药的主要药物动力学参数 :AUC =(91 40± 7 5 1)mg·h/L ,MRT =(7 15± 0 5 8)h ,t1/ 2 β=(5 99± 0 2 6 )h .猪喂饲后 5min内服给药的主要药物动力学参数为 :AUC =(88 47± 2 2 1)mg·h/L ,MRT =(10 94± 1 0 6 )h ,t1/ 2 β=(6 44± 0 90 )h .试验结果表明 ,猪喂饲后内服氟甲砜霉素的生物利用度与饥饿后的相似 ,但峰浓度显著小于饥饿后的峰浓度 ,两者的消除半衰期相似 .

Abstract:根据传染性喉气管炎病毒美国６３２株和英国Ｔｈｏｒｎｅ株ｇＣ基因的序列设计１对引物，以北京Ｅ２株为模板，用ＰＣＲ方法扩增到长度为１．９ｋｐ的片段，并将其克隆至质粒ｐＡ－Ｔ。用碱小量法制备质粒ＤＮＡ，以酶切和质粒ＰＣＲ的方法对其进行了鉴定，并以正向和反向引物测定其两翼序列，结果正向引物测出４９８个碱基，反向引物测出４９９个碱基，将所得序列输入ＧｅｎＢａｎｋ与其他毒株进行比较，结果发现其与美国６３２株的

Abstract:运用工程力学基本理论和土力学试验方法，剖析植物根系在增强松软饱和滩涂土壤抗剪强度中的作用机理。由花米草土壤－根系复合体原型结构试样直剪试验得知：复合体抗剪强度τ与法向正压力σ的关系符合库仑定律，且τ随含根量Ｍｒ的增加而提高，并提高土壤中草根的作用与钢筋混凝土结构中的钢筋类似，参照钢筋钢混土结构抗剪承载力公式，总结出复合体单位面积上的受剪承载力与含根量之间的关系公式为τ＝τ。＋０．１４Ｍｒｆｒ，公式

Abstract:应用计算机图像分析技术，拍摄和分析了甘蔗剥叶刷式剥呆机构剥叶的全过程。提取和分析了钢丝图像上下端点的坐标值、端点之间的直线距离、钢丝的总长度和钢丝图像的转角位置等特征参数。绘制了钢线上端总坐标Ｘ值、Ｙ值以及钢丝弯曲程度与钢丝转角位置之间的关系曲线。发现甘蔗的剥叶过程由３个阶段组成：接触压紧阶段、弯曲变形阶段和滑出剥叶阶段。

Abstract:用大品径毛细管柱气相色谱／电子捕获器（ＧＣ／ＥＣＤ）方法测定新鲜荔枝中“六六六”４种异构体的农药残留。１０ｍｉｎ即可把４种异构体有效分离检测。α－ＢＨＣ，β－ＢＨＣ，γ－ＢＨＣ，δ－ＢＨＣ平均质量比为４７．５～１２４μｇ／ｋｇ时，标准偏差为５．２２～１１．８μｇ／ｋｇ。标样的添加回收率为９２．０％～１０９％，标准曲线相关系数为０．９９４～０．９９９，方法的最低检出限为０．１４４～０．３７３μｇ／ｋ