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不同油菜品种硼素营养的遗传性差异机理研究 被引量:24
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作者 胡秋辉 徐光壁 史瑞和 《南京农业大学学报》 CAS CSCD 北大核心 1990年第1期80-86,共7页
本文以土培试验和溶液培养试验,研究了油菜不同品种硼素营养的遗传性差异的可能机理。结果表明,油菜出现花而不实是因为缺硼后花粉发育不正常,花粉粒不萌发,花粉管未伸长。低硼条件下,施用硼肥能显著地提高低芥酸油菜的产量。油菜的土... 本文以土培试验和溶液培养试验,研究了油菜不同品种硼素营养的遗传性差异的可能机理。结果表明,油菜出现花而不实是因为缺硼后花粉发育不正常,花粉粒不萌发,花粉管未伸长。低硼条件下,施用硼肥能显著地提高低芥酸油菜的产量。油菜的土壤硼素临界值因品种而异。油菜不同品种对缺硼反应差异的机理是它们根系吸硼能力和硼在体内的再利用等方面存在差异。 展开更多
关键词 油菜 品种 硼素营养 遗传性差异
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小麦矿质营养遗传性差异分析研究
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作者 闫晓明 陶龙红 吴清鹄 《安徽农业科学》 CAS 1995年第1期33-35,共3页
通过23个小麦品种拔节──孕穗期样品N等10种养分的测试分析,分析了小麦品种间矿质养分含量、吸收分布状况、利用效能等差异性。结果表明:小麦品种间矿质养分含量存在显著性差异,品种间拔节──孕穗期倒1──倒4叶片养分含量... 通过23个小麦品种拔节──孕穗期样品N等10种养分的测试分析,分析了小麦品种间矿质养分含量、吸收分布状况、利用效能等差异性。结果表明:小麦品种间矿质养分含量存在显著性差异,品种间拔节──孕穗期倒1──倒4叶片养分含量虽差异很大,但其分布状况却基本一致;小麦品种间矿质营养利用效能也存在差异,淮北地区5个种植品种,以豫麦18号、豫麦13的N、P、K利用效能较高,冀麦5418利用放能较低。 展开更多
关键词 小麦 矿质营养 遗传性差异 效能比
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中国大陆湖北钉螺遗传性状差异研究进展 被引量:1
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作者 石朝辉 夏明仪 邱持平 《中国兽医寄生虫病》 1998年第4期44-47,共4页
关键词 钉螺 遗传性差异 蛋白质电泳 湖北钉螺 同工酶
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Research on Genetic Diversities between Xiaogan Water Chestnut and Wild Chestnut by Randomly Amplified Polymorphic DNA Technology 被引量:3
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作者 盛继群 曹姣 李建华 《Agricultural Science & Technology》 CAS 2010年第8期84-86,90,共4页
[Objective] The aim was to study the genetic diversities between Xiaogan water chestnut and wild chestnut with randomly amplified polymorphic DNA (RAPD) technology. [Method] Genetic diversities of the local cultivat... [Objective] The aim was to study the genetic diversities between Xiaogan water chestnut and wild chestnut with randomly amplified polymorphic DNA (RAPD) technology. [Method] Genetic diversities of the local cultivated water chestnut,wild chestnut,Lepironia articulata and Scirpus planiculmis Fr. Schmidt were analyzed by RAPD technology. [Result] Among the screened random primers 841,842,807 and 840,the polymorphism of amplification product of 841 was evident,and the obtained bands in electrophoresis were clear and showed good repeatability. Cluster analysis result showed that the affinity of cultivated water chestnut and wild water chestnut was nearer than that between Lepironia articulata and Scirpus planiculmis. [Conclusion] The research provides theoretical basis for cultivating high-quality new varieties of water chestnut. 展开更多
关键词 Water chestnut RAPD Cluster analysis Genetic diversities
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血管内皮细胞在异种移植中的作用
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作者 李平 《国外医学情报》 1996年第12期9-9,共1页
异种移植,尤其是将遗传性差异较大的其它动物的脏器移植给人体时,最大的问题是超急性排斥反应(HRA),器官经数分至数小时就被排斥掉。从器官大小、伦理问题、易操作等方面看,认为最适于给人体移植的动物是猪。因为是异种移植,所以必须牢... 异种移植,尤其是将遗传性差异较大的其它动物的脏器移植给人体时,最大的问题是超急性排斥反应(HRA),器官经数分至数小时就被排斥掉。从器官大小、伦理问题、易操作等方面看,认为最适于给人体移植的动物是猪。因为是异种移植,所以必须牢记可能发生 HRA。 展开更多
关键词 血管内皮细胞 异种移植 自然抗体 控制因子 补体 遗传性差异 抗原抗体复合物 器官 脏器移植 动物
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东北黑白花牛的血型及其基因构成
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作者 沈相俊 李文用 +6 位作者 金道俊 张白鹿 韩虎龙 申秀吉 王立国 王立军 陈忠效 《延边大学农学学报》 1991年第1期44-50,共7页
用49种国际标准抗血清检查了黑龙江省家畜繁育指导站的71头黑白花种公牛的9个血型系50种抗原,分析表型,确定基因型,计算其基因频率;分析研究了东北黑白花奶牛血型的基因构成,并与美国,日本的黑白花奶牛进行了比较,其结果表明,东北黑白... 用49种国际标准抗血清检查了黑龙江省家畜繁育指导站的71头黑白花种公牛的9个血型系50种抗原,分析表型,确定基因型,计算其基因频率;分析研究了东北黑白花奶牛血型的基因构成,并与美国,日本的黑白花奶牛进行了比较,其结果表明,东北黑白花牛的遗传基础很广,它同日本和美国黑白花牛两个群体之间存在着遗传性差异。 展开更多
关键词 东北黑白花牛血型 基因 基因频率 基因构成 遗传性差异
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GENETIC DIVERSITY OF THE WILD AND REARED PSEUDOSCIAENA CROCEA 被引量:1
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作者 王军 苏永全 +2 位作者 全成干 丁少雄 张纹 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2001年第2期152-156,共5页
The genetic diversity of both wild and reared Pseudosciaena crocea (Richardson) collected from Guan Jing Yang in Ningde, China in May 1999 was investigated by random amplified polymorphic DNA (RAPD) in the present stu... The genetic diversity of both wild and reared Pseudosciaena crocea (Richardson) collected from Guan Jing Yang in Ningde, China in May 1999 was investigated by random amplified polymorphic DNA (RAPD) in the present study. The polymorphism and mean difference of the wild population as revealed by RAPD were 18.9% and 0.0960 respectively, and those of the reared stocks were relatively lower, with 16.7% in polymorphism and 0.0747 in mean difference. The genetic distance between the two stocks was 0.0041. From the comprehensive investigation, the main reasons for the loss of genetic diversity were probably overfishing, small number of parents as broodstocks and the debatable artificial ranching. Results from this study also showed that the large yellow croaker populations distributed along Fujian coastal waters including Guan Jing Yang still potentially wide genetic variability. It is suggested that genetic management and prevention should be scientifically conducted in order to maintain and improve the genetic diversity of the P. crocea population . 展开更多
关键词 Pseudosciaena crocea genetic diversity RAPD
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Phenotypic and genetic characterization of a novel strain of Acidithiobacillus ferrooxidans(AF2) 被引量:1
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作者 刘倩 周洪波 +2 位作者 杨波 敖敬群 陈新华 《Journal of Central South University》 SCIE EI CAS 2011年第2期386-391,共6页
A comparative study on the phenotypic and genetic characteristics among Acidithiobacillus ferrooxidans (AF2), a typic strain ATCC23270 and a previously isolated strain AF3 was performed. AF2 can use ferrous ion (F... A comparative study on the phenotypic and genetic characteristics among Acidithiobacillus ferrooxidans (AF2), a typic strain ATCC23270 and a previously isolated strain AF3 was performed. AF2 can use ferrous ion (Fe^2+) or elemental sulfur (S^0) as sole energy source, but oxidizes So more effectively than Fe^2+, which is different from ATCC23270 and AF3. The G+C content of AF2 is 51.8% (molar fraction), however, ATCC23270 and AF3 strains have G+C content of 63.7% and 64.8% (molar fraction), respectively. The DNA-DNA hybridization results show that AF2 has 41.53% and 52.38% genome similarity to ATCC 23270 and AF3, respectively, but AF3 has a high genome similarity of 89.86% to ATCC 23270 strain. Rusticyanin (rus) and subunit III of aa3-type cytochrome oxidase (coxC) genes are not detected in AF2, but Fe^2+ oxidase (iro) gene can be detected. To understand the genomic organization of iro gene, a cosmid library of AF2 genome was constructed and iro gene-containing clone was screened. The sequencing result shows that although the nucleotide sequence of iro gene in AF2 is completely identical to that of ATCC 23270 strain, its genomic organization is different from that of ATCC 23270. In AF2, iro is located at downstream ofpurA gene, while it is located at downstream ofpetC-2 gene in ATCC 23270 strain. These results indicate that AF2 is a novel strain ofA. ferrooxidans, and that phenotypic differences among the strains ofA. ferrooxidans are closely correlated with their genetic polymorphisms. 展开更多
关键词 Aeidithiobacillusferrooxidans phenotypic and genetic characterization Iro gene cosmid library iron respiratory chain
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胡森论均等的不相容性 被引量:14
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作者 张人杰 《全球教育展望》 1988年第3期54-55,共2页
当代著名教育学者托尔斯顿·胡森认为,在同一个"教育面前机会均等"的概念中,存在着某些不相容性。首先,从遗传学的观点着眼,人与人之间的不平等生而有之,况且,他们出生后最初几年里,是在遗传和社会地位方面都有所区别的... 当代著名教育学者托尔斯顿·胡森认为,在同一个"教育面前机会均等"的概念中,存在着某些不相容性。首先,从遗传学的观点着眼,人与人之间的不平等生而有之,况且,他们出生后最初几年里,是在遗传和社会地位方面都有所区别的父母的抚养下成长的,所以要实现教育面前机会均等极为困难。但是,关于这一问题,无论如何不要忘记,捍卫遗传学观点的心理学家的倾向是,立足于躯体的数据资料,从而概括出心理学的数据,即概括出构成行为的要素的。 展开更多
关键词 学业成就 不相容性 遗传 机会均等 教育系统 人与人 不平等 教育学者 遗传性差异 社会地位
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