美国红栌的组织培养和快速繁殖

1植物名称美国红栌(Cotinus coggygria‘Royal purple'). 2材料类别嫩茎段、茎尖. 3培养条件(1)启动培养基:MS 6-BA 0.2 mg·L-1(单位下同) NAA 0.05 3%蔗糖;(2)增殖培养基:MS 6-BA 0.5 NAA 0.1 3%蔗糖;(3)壮苗培养基:MS NAA 0.1 3%蔗糖;(4)生根培养基:1/2MS IBA 1.0 NAA 0.1 PP3332.0 2%蔗糖.以上培养基均加0.7%琼脂,pH 5.8～6.0.培养温度为(25±2)℃,光照12 h·d-1,光照度为2 000lx.     

金叶接骨木的组织培养和快速繁殖

1植物名称金叶接骨木(SambuCus racemosa ‘Plumosa aurea'). 2材料类别茎尖、茎段. 3培养条件芽诱导培养基:(1)MS NAA 0.2 mg·L-1(单位下同) 6-BA 1.0,(2)MS NAA 0.4 6-BA 1.0,(3)MS IBA 0.2,(4)1/2MS(大量元素1/2) IA 0.2;生根培养基:(5)MS NAA 0.4,(6)1/2MS NAA 0.2,(7)1/2MS IBA 0.2.以上培养基均加入6 g·L-1琼脂粉,pH 5.8.培养基(1)、(2)、(5)和(6)中含30g·L-1蔗糖,(3)、(4)和(7)含20 g·L-1蔗糖.培养温度(25±1)℃,光照度2 000 lx,光照12 h·d-1.     

山莓的组织培养及快速繁殖

1植物名称山莓(Rubus corchorifolius). 2材料类别带芽茎段. 3培养条件(1)诱导侧芽萌动及不定芽分化培养基:MS 6-BA 1.0 mg·L-1(单位下同);(2)继代增殖培养基:MS IBA 0.1 6-BA 1.2;(3)生根培养基:1/2MS IBA 0.8.以上培养基均含3%蔗糖、0.7%琼脂,pH 5.8～6.2.培养温度为26～27℃,光照度1 400～1 600 lx,光照时间12h·d-1.     

小水榕的组织培养与快速繁殖

1植物名称小水榕(anubias barteri). 2材料类别茎尖、茎段. 3培养条件诱导培养基:(1)MS 6-BA 5.0 mg·L-1(单位下同) KT 5.0;增殖培养基:(2)MS 6-BA1.0,(3)MS 6-BA 2.0,(4)MS 6-BA 3.0,(5)MS 6-BA 4.0,(6)MS 6-BA 5.0;生根培养基:(7)MS NAA 0.3 IBA 0.2.各培养基中均添加20 g·L-1白糖、5 g·L-1琼脂,pH 5.8.培养温度25～30℃,诱导和增殖培养的光照度500 lx,生根培养的光照度1 500～2 000 lx,光照时间12 h·d-1.     

土人参茎尖培养和植株再生

1　植物名称　土人参 (Talinumpaniculatum)。2　材料类别　实生苗之茎尖 ,种子取自本校花圃。3　培养条件　种子萌发培养基 :( 1 ) 1 /2MS +0 .7%琼脂 + 2 %蔗糖。丛生芽诱导培养基 :( 2 )MS + 6 BA 0 .5mg·L- 1 (单位下同 ) ;( 3)MS +NAA0 .5 + 6 BA 2 .0 ;( 4 )MS +NAA 0 .5 +KT 2 .0 ;( 5 )MS+NAA 0 .5 + 6 BA 3.0。丛生芽增殖培养基 :( 6)MS + 6 BA 2 .0 ;( 7)MS +NAA 0 .0 5 + 6 BA 3.0。生根培养基 :( 8) 1 /2MS +NAA 2 .0。上述 ( 2 )～ ( 8)培养基均附加 30 g·L- 1 蔗糖、7g·L- 1 琼脂 ,pH 5 .8。培养室温…     

蘘荷茎尖的离体快繁

1植物名称蘘荷(Zingiber mioga). 2材料类别根茎上的休眠芽. 3培养条件诱导休眠芽萌动培养基:MS 6-BA1.0 mg·L-1(单位下同) NAA0.2;增殖培养基:MS 6-BA 1.5 NAA 0.2;展叶、生根培养基:1/2MS 6-BA 1.0 NAA 0.5.以上培养基中均含3%蔗糖、0.8%琼脂,pH 5.8.培养温度为(26±1)℃,光照时间12 h·d-1,光照度1 800～2 000 lx.     

地被悬钩子的组织培养和快速繁殖

1植物名称地被悬钩子(Rubus calycinoides). 2材料类别茎段. 3培养条件基本培养基为MS培养基.(1)诱导愈伤组织培养基:MS 6-BA 2.0 mg·L-1(单位下同) NAA 0.1;(2)诱导分化培养基:MS 6-BA 2.0 NAA 0.5;(3)丛芽增殖培养基:MS 6-BA 2.0 NAA 0.1;(4)生根培养基:4/5MS NAA 0.5.以上培养基均加入0.7%的琼脂、3%蔗糖、pH 5.6.培养温度为(25±1)℃,光照度1 500～2000 lx,光照12 h·d-1.     

圆瓣姜花茎尖组织培养

1 植物名称圆瓣姜花(Hedychium forrestii). 2 材料类别茎尖. 3 培养条件以MS 为基本培养基.(1)茎尖诱导培养基:MS+6-BA 0.5 mg*L-1(单位下同)MS+NAA 0.2;(2)芽增殖培养基:MS+6-BA 4.0+NAA 0.1;(3)生根培养基:1/2MS+IAA 0.02.上述各培养基均附加2.0%蔗糖,0.7%琼脂,pH 5.4～5.8,在培养温度为(28±2)℃,光照度为2 000 lx连续光照下培养.     

金叶日本冬青的组织培养与快速繁殖

1植物名称日本金叶冬青(Ilex crenata),又名钝齿冬青. 2材料类别顶芽和带腋芽的嫩茎段. 3培养条件启动培养基:(1)MS 6-BA 3 mg·L-1(单位下同) NAA 0.01 2,4-D 0.1 蔗糖3%;继代增殖培养基:(2)MS 6-BA 1 NAA 0.2 蔗糖3%;生根培养基:(3)1/2MS NAA 0.6 2%蔗糖.上述培养基均加0.7%琼脂,pH 5.8.培养温度为(25 2)℃,光照度为1500 lx,光照时间12 h·d-1.     

光叶楮的组织培养和快速繁殖

1植物名称光叶楮(Broussonetia papyrifera),又名构树. 2材料类别茎尖与茎段. 3培养条件启动培养基:(1)MS 6-BA 1.0 mg·L-1(单位下同) NAA 0.5.增殖培养基:(2)MS 6-BA0.5 NAA 0.02;(3)MS 6-BA 1.0 NAA 0.2;(4)MS 6-BA 1.5 NAA 0.1;(5)MS 6-BA 1.5 NAA 0.5.生根培养基:(6)1/2MS IBA 0.5;(7)1/2MS NAA0.3;(8)MS 6-BA 0.2 NAA 0.01.以上培养基均添加3%蔗糖、0.7%琼脂,pH 5.8.培养温度25～28℃,光照12 h·d-1,光照度2 000lx.     

Selection with two alleles and complete dominance

For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment.     

杆状病毒出芽病毒粒子膜融合蛋白的研究进展

杆状病毒是一类感染节肢动物的病原微生物,其基因组为双链环状DNA,大小为80～180kb.     

Inception of the Modern Public Health System in China and Perspectives for Effective Control of Emerging Infectious Diseases: In Commemoration of the 140th Anniversary of the Birth of the Plague Fighter Dr. Wu Lien-Teh

In this article, we systematically review Dr. Wu Lien-Teh's academic achievements and outstanding contributions in the prevention and control of the plague epidemic in northeast China and introduce the development of the earliest public health epidemic prevention system in China in order to commemorate the 140th anniversary of Dr. Wu Lien-Teh's birth. We hope that this article will provide insights into the effective prevention and control of emerging infectious diseases as well as the current worldwide pandemic of COVID-19, facilitating the improvement and development of public health systems in China and around the globe.