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- Quantitative Estimates of Outcrossing Rates in Natural Populations of Sagittaria trifolia Linn. 野慈姑自然群体异交率的定量估测。
- The authors have studied genetic structure of natural populations of Sassafras tzumu Hemsl.using isozyme analysis. 作者运用同工酶电泳技术对檫木天然群体的遗传结构进行了研究,分析了湖北省的3个檫木天然小群体的遗传结构。
- The genetic variation of eight isozyme expressed by twelve gene loci among 3 natural populations of Picea crassifolia was studied by the aids of PAGE electrophoresis. 摘要采用聚丙烯酰胺凝胶电泳实验对青海云杉的3个天然群体(甘肃祁连山、青海大通,甘肃甘南州)的12个基因位点表达的8种同工酶的遗传变异模式进行了研究。
- In natural populations, the correlation of total alkaloid with nicotine and nornicotine decreased, and that with anabasine and anatabine did not change. 在自然群体中, 总生物碱与烟碱和降烟碱的相关性减小, 与新烟草碱和假木贼碱的相关性没有变化。
- Bioleaching, by means of natural populations of Thiobacillus ferrooxidans and related Thiobacilli, for example, allows recovery of up to 70% of the copper in low-grade ores. 生物萃取,例如应用天然的氧化亚铁硫杆菌菌群和相关的硫杆菌,使低品级的矿石中铜的收率达到70%25。
- Cinnamomum kanehira Hay. is a valuable timber species in Taiwan.However, natural populations of this species are declined rapidly caused by over-utilization. 牛樟是台湾重要经济树种,但因人为利用而使天然族群数量日渐减少。
- A species may be defined as a group of organisms of interbreeding natural populations that are reproductively isolated from other groups and that share in common gene pools. 物种是生物界发展的连续性与间断性统一的基本间断形式;在有性生物物种呈现为统一的繁殖群体,由占有一定空间,具有实际或潜在繁殖能力的种群所组成,而且与其他这样的群体在生殖上是隔离的。
- Abstract The acting factors were used to build a life table of natural populations of the cotton bollworm in northern Xinjiang, and the life table was studied and discussed. 摘要 采用作用因子构建了北疆棉铃虫自然种群生命表,并对棉铃虫种群生命表进行了研究和讨论。
- Li Wang, Guifang Zhao, Genetic diversity of the endangered and endemic species Psathyrostachys huashanica natural populations using simple sequence repeats (SSRs) markers. 张林静,岳明,赵桂仿等,新疆阜康绿洲荒漠过渡带植物群落物种多样性与土壤环境因子的耦合关系,应用生态学报,2002,13(6):658-662。
- Study on the Natural Population Life Table of Pyla sp. 喜树幽斑螟自然种群生命表的研究。
- In general, the natural populations of ginkgo can survive in nature as long as they are let to be alone. 只要让银杏群体保持自然的更新演替,自然银杏群体是能够在自然界继续生存下去的。
- Bionomics of Perissopneumon xyliae and life tables of its natural population. 云龟履硕蚧的生物学及其自然种群生命表。
- Based on the observation of natural populations and the data collected from references,Q cluster analysis and principle component analysis for 39 characters of 14 species in the Genus Schisandra have been conducted. 在野外居群观察和文献资料收集的基础上;对五味子属的14种植物的39个分类性状进行了Q型聚类分析和主成分分析.
- Because intraspecific matings are far more common than interspecific matings in natural populations of plants, autopolyploids must arise at a much higher rate than allopolyploids . 因为在植物自然群体中种内交配远比种间交配更普遍,所以同源多倍体形成的几率比异源多倍体要高的多。
- Abstract The genetic structure of 217 individuals from seven natural populations of oryza rufipogon Griff. in Gaozhou was analyzed by use of 32 pairs of simple sequence repeat(SSR) primers. 摘要 利用32对SSR引物对来自全部7个自然居群的217份广东高州普通野生稻(简称“高野”)材料进行遗传结构、多样性和遗传聚类分析。
- The primacy of population thinking: the genetic diversity carried in natural populations is a key factor in evolution. 群体思想占首位:自然群体携带的遗传多样性是进化中的一个关键因素。
- The natural population growth rate dropped from 14.39 per 1,000 to 11.21 per 1,000. 人口自然增长率由14.;39‰下降为11
- With the natural population growth rate down to 6.45, China has entered a new period of low and stable birthrate. 人口自然增长率降到6.;45‰,进入了稳定低生育水平的时期。
- In 2001,the natural population growth of ethnic minorities was 13.04‰,whereas that of the Han was 8.25‰. 2001年少数民族人口自然增长率为13.;04‰,汉族为8
- It is natural for a cat to catch mice. 猫捉老鼠是本能。