共查询到20条相似文献,搜索用时 62 毫秒
1.
分子标记技术在烟草遗传育种中的应用 总被引:3,自引:0,他引:3
本文综述了几种分子标记技术(RFLP、RAPD、AFLP、SRAP和SSR)在烟草遗传育种中的应用,包括分子标记在烟草种质资源、抗病育种等方面的研究进展。最后,分析了分子标记技术在烟草遗传育种研究中存在的问题及今后发展的方向。 相似文献
2.
分子标记技术在烟草种质资源研究中的应用进展 总被引:2,自引:0,他引:2
DNA分子标记作为新发展起来的一种遗传标记形式,凭借其可靠有效等优点,在农业科学研究中的应用越来越广泛。综述了几种分子标记技术(RAPD、AFLP、ISSR)在烟草种资源中的应用进展,分析了分子标记技术在烟草种资源及遗传多样性研究中存在的问题及今后发展方向。 相似文献
3.
4.
DNA分子标记技术在植物种质资源鉴定中的应用 总被引:5,自引:0,他引:5
DNA分子标记技术从基因水平进行标记,不受环境因素、个体发育阶段及组织部位影响,多态性强,已成为生物学主要遗传标记手段之一。综述了几种主要DNA分子标记技术的原理和优缺点,着重阐述了其在植物种质资源鉴定方面的应用。 相似文献
5.
6.
花生分子标记的研究进展 总被引:2,自引:0,他引:2
国内外对花生的研究特别是在分子水平上的研究相对水稻、油菜等农作物比较薄弱。近些年,分子标记技术迅速发展,在花生上也得到广泛的应用。本文从花生属起源、种质资源的遗传多样性、抗性基因的标记和指纹图谱等方面,综述了国内外花生分子标记的研究进展。 相似文献
7.
8.
DNA分子标记在果树遗传育种研究中的应用 总被引:9,自引:0,他引:9
DNA分子标记是随着分子生物学技术的发展出现的一类重要的遗传标记,近年来发展非常迅速,已在果树遗传育种研究的各个方面得到广泛的应用。介绍了几种DNA分子标记技术的原理,综述了DNA分子标记在果树种质资源研究、分子遗传图谱构建、基因定位、分子辅助选择等方面的应用,并对其在果树上的应用前景和存在问题进行了评述。 相似文献
9.
10.
11.
12.
13.
14.
15.
In experiments on Black Sea skates (Raja clavata), the potential of the receptor epithelium of the ampullae of Lorenzini and spike activity of single nerve fibers connected to them were investigated during electrical and temperature stimulation. Usually the potential within the canal was between 0 and –2 mV, and the input resistance of the ampulla 250–400 k. Heating of the region of the receptor epithelium was accompanied by a negative wave of potential, an increase in input resistance, and inhibition of spike activity. With worsening of the animal's condition the transepithelial potential became positive (up to +10 mV) but the input resistance of the ampulla during stimulation with a positive current was nonlinear in some cases: a regenerative spike of positive polarity appeared in the channel. During heating, the spike response was sometimes reversed in sign. It is suggested that fluctuations of the transepithelial potential and spike responses to temperature stimulation reflect changes in the potential difference on the basal membrane of the receptor cells, which is described by a relationship of the Nernst's or Goldman's equation type.I. P. Pavlov Institute of Physiology, Academy of Sciences of the USSR, Leningrad. I. M. Sechenov, Institute of Evolutionary Physiology and Biochemistry, Academy of Sciences of the USSR, Leningrad. Pacific Institute of Oceanology, Far Eastern Scientific Center, Academy of Sciences of the USSR, Vladivostok. Translated from Neirofiziologiya, Vol. 12, No. 1, pp. 67–74, January–February, 1980. 相似文献
16.
N. P. Vesselkin Yu. V. Natochin 《Journal of Evolutionary Biochemistry and Physiology》2010,46(6):592-603
Evolution of living organisms is closely connected with evolution of structure of the system of regulations and its mechanisms.
The functional ground of regulations is chemical signalization. As early as in unicellular organisms there is a set of signal
mechanisms providing their life activity and orientation in space and time. Subsequent evolution of ways of chemical signalization
followed the way of development of delivery pathways of chemical signal and development of mechanisms of its regulation. The
mechanism of chemical regulation of the signal interaction is discussed by the example of the specialized system of transduction
of signal from neuron to neuron, of effect of hormone on the epithelial cell and modulation of this effect. These mechanisms
are considered as the most important ways of the fine and precise adaptation of chemical signalization underlying functioning
of physiological systems and organs of the living organism 相似文献
17.
18.
19.