The orderliness of the heredity and variation of S 1 gene of infectious bronchitis virus(IBV S 1 gene)was analysed in this article with the sequences of IBV S 1 gene of difference strains in NCBI Genbank.
(4) The reasons why leaded to the pattern of modern distribution were caused by the comprehensive action of glacial epoch and interglacial stage in the Cenozoic Era, topography and soil in Hunan, heredity and variation of plands, and their adaptive selection to environment.
This paper sums up and analyzes calculation of heredity and variation of senior middle school, that based on some knowledge of DNA constitution, DNA copy, homologous chromosome, law of segregation, law of independent assortment, genealogy.
The heredity and variation of the genome was reviewed in this paper. The 5'UTR, the Nsp2 of ORF1, ORF3 and ORF5 can endure more differences than others. It may be relates to the pathogenicity of the virus
The heredity and variation of peroxidase of some species in salix are studied by the means of polyacrylamide gel electrophoresis, The results are: (1) There are 25 bands in the zymogram (9 bands are basic including 1 bands is common in all materials and 16 bands are variate.)
Included in this analysis is a description of the way Darwin employed the distinction between transmission and development, as well as the conceptual relationship he saw between heredity and variation.
Sir William Lawrence (1783-1867) a study of pre-Darwinian ideas on heredity and variation
These informations can be used as reference materials in the research of heredity and variation ofpinus koraiensis.
Research on the heredity and variation of the peruxidase isoenzyme of needles ofpinus koraiensis
In the paper the research work on anther culture in rice is summarized from the following aspects: (1) the stage appropriate for anther culture and low temperature treatment. (2) the requirements for anther culture, (3) Androgenesis, (4) the phenomenon of albino plantlets. (5) the differentiation rate of green plantlets and the capability for anther culture, (6) the heredity and variation of pollen--plants and. (7) the application of techniques for anther culture.
By studying nutrition requirments of a Paecilomyces farinosus heterokaryonstrain and two homokaryon strains,a spore type,and a hyphae type,heredity and variation,adaptability in soil,mechanism of survival in the nature and strain for mass production weredicussed.
Heredity and variation on height and root diameter in a tester mating system of Populus alba for one year seedling are analysesd. The results show specific combining ability variances are dominant and amount to 82% for hight, 96% for root diameter. It is suggested that the utilization of specific combining ability be given priority from growth on poplus alba of one year seedling.