硒对汞致抗氧化系统损伤的拮抗作用

选用健康雏鸡250只作实验动物（对照组、中毒组、3个水平的硒保护组），研究汞对血液、组织中GSH－Px活性和LPO含量的影响以及硒与汞之间的相互作用效应。实验结果表明：汞可显著降低血清、组织中GSH－Px活性（P＜0.01），引起动物组织器官脂质过氧化，致使血清、组织中LPO含量显著增高（P＜0.01），且有时间－效应关系。从而说明汞能降低机体的抗氧化功能，损伤抗氧化系统；硒对汞致抗氧化系统的损伤具有拮抗作用。     

柳枝浸提液对小麦籽粒发芽的抑制作用研究

研究了柳树枝叶浸提液对小麦籽粒发芽的抑制效应，结果表明：抑制作用的大小随浸提时间和浸提液浓度的不同而异，煎煮时间对小麦种子发芽抑制强度依次为4h〉3h〉2h〉0．5h，浸提液不同浓度的抑制效果为280g／L〉200g／L〉120g／L〉40g／L。     

Inheritance of Resistance to Pseudomonas solanacearum E. F. Smith in Tetraploid Potato

Inheritance of bacterial wilt resistance in tetraploid potato was investigated in segregating progenies of parent clones with resistance derived from different specific sources and different types of adaptation. A race 1 and a race 3 isolate of Pseudomonas solanacearum were used to test the resistance under warm temperatures. Results obtained indicated partial dominance of resistance. Significant general and specific combining abilities showed that both additive and non-additive gene actions are important in conditioning resistance expression. There was evidence that epistasis is an important component of the non-additive gene action in the inheritance of resistance. Other aspects of the resistance and implications for breeding are discussed.     

Male Sterility in Barley

The anther form and development of eight two-rowed genie male sterile barley mutants are abnormal. The male sterility in each mutant is conditioned by single non-allelic recessive genes. These mutant genes cause reductions in anther size and lumen diameter. Though in seven mutants, the male meiosis is normal until microspore liberation, the micro-spores abort in all cases after release from the PMCs. In one mutant, the microspores degenerate at the tetrad stage before release from the PMCs. In four mutants, the tapetal development and disintegration are normal, in four others they are abnormal. Despite these variations, the male sterility in all the eight mutants is complete.     

木霉菌对抑制梨轮纹菌的生理特性研究

梨轮纹病菌被木霉菌感染后,多酚氧化酶(PPO)、过氧化氢酶(CAT)、过氧化物酶(POD)和超氧化物歧化酶(SOD)的活性最终下降;丙二醛(MDA)含量和超氧阴离子(O2-)产生速率上升。初步确定,梨轮纹病菌被木霉感染后,活性氧清除系统等被破坏,膜脂过氧化作用加强,是最终导致菌体受害的原因之一。     

Inequality and conflict in Fiji: From purgatory to hell?

Abstract: This article examines socio‐economic inequality in Fiji and finds that, contrary to oft‐repeated claims, inequality between Fiji"s major ethnic groups (inter‐ethnic inequality) is less significant than inequality within each ethnic group (intra‐ethnic inequality). In spite of this reality, inter‐group inequality and affirmative action policies have remained central features of state policy in Fiji. This article suggests that Fiji's experience has three implications for the growing literature on the relationship between inequality and conflict. First, examining average inequality between groups can be misleading. Secondly, a key to understanding the relationship between ethnic and economic cleavages in post‐colonial plural societies, such as Fiji, is in the interaction between intra‐group and inter‐group inequality. Thirdly, there does not seem to be a straightforward relationship between actual levels of inequality, perceptions of inequality, and the prominence given to inequality in ethno‐nationalist discourse. In Fiji's case, the strategic deployment of inter‐group inequality has served, and continues to serve, the material and discursive interests of some political elites. As a result, the intersection between ethnicity, inequality and political rivalry in contemporary Fiji has been the source of much conflict and, importantly, may offer a nexus on which attempts at conflict resolution should focus.     

若干玉米胚乳突变体基因效应的研究

对５个玉米单隐性胚乳突变体、３个双隐性胚乳突变体的可溶性糖（还原糖、蔗糖）、水溶性多糖、淀粉、粗蛋白、赖氨酸含量测定，并对突变体种子结构扫描电镜观察。分析了玉米胚乳突主体的基因效应及其互作效应。     

Study on Sociological Connotation of the Community

In this paper from the view point of sociology, the main factors of community formation and the sociological connotations of the community are analyzed. Finally, the objects of realization of sociological elements for a community are presented.     

A genetic study of popping quality in Sorghum (Sorghum bicolor (L.) Moench)

Summary Two crosses of sorghum, Sorghum bicolor (L.) Moench (IS 1054 × ICSV-1, and IS 5604 × IS 1054) were evaluated in parental, F1, F2, and backcross generations for the variation in their popping quality as measured by pop volume (ml). Dominance was in the direction of low pop volume. Dominance and additive gene effects, in that order, governed most of the variation, while significant dominance x dominance type of interaction effects could also be detected. There was no evidence for higher order gene interactions.Approved as Journal Article 630 by the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, P.O. 502 324, Andhra Pradesh, India.     

Genotypes of Hybrid Necrosis in 25 Spring Varieties of Common Wheat (Triticum aestivum L.)

Book reviewed in this articles: Cereal Grain Protein Improvement. Shivanna, K. R., and B. M. Johri, The Angiosperm Pollen. Structure and Function. Gustafson, J. P., Gene Manipulation in Plant Improvement. Backer, A. W., Manual of Quantitative Genetics. Fishbeck, G., W. Plarre und W. Schuster (Hrag.) , Hoffmann , W., A. Plarre : Lehrbush der Züchtung landwirtschaftlicher Kulturflanzen, Bd. 2, Spezieller Teil, 2. Auflage. Dodds, J. H. (editor and author), Plant Genetic Engineering. Fiechter, A. (managing editor), Advanced in Biochemical Engineering/Biotechnology. Vol. 31. Plant Cell Culture.