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secondary filial generation F2
secondary filial generation(F2) 子二代
The second filial generation make itself more safer by the representative of self- inactivation lentivirus. 第二代慢病毒载体系统以自身失活的慢病毒为代表，使该载体系统更加安全。
F2 The second filial generation, obtained by crossing or selfing within the F1 generation. 子二代（杂种二代）：，通过子一代内部的杂交或自交获得。
Comparison study on performance among albino rainbow trout and Donaldson rainbow trout and their filial generation were studied. 本文对引进种日本金鳟和道氏虹鳟及其杂交后代的生存力及稚鱼的生长速度等进行了比较研究。
The Content of Organic Acid, Fattiness and Other Components Between Filial Generation and Parent Hippophae rhamnoides L. 杂交子代与亲本群体沙棘叶有机酸、脂肪及其它常规成分含量及变化研究。
The results showed that, in the blood of Angora goat and high filial generation, Alb,Pr,Pa,LDH,Amy were monomorphic, Tf? Hp? 结果表明 :安哥拉山羊与F3 血液Alb、Pr、Pa、LDH、Amy呈单态 ,Tf、Hp、Hb、Akp呈多态 ;
Title： The Content of Organic Acid,Fattiness and Other Components Between Filial Generation and Parent Hippophae rhamnoides L. 关键词：杂交子代;亲本群体;沙棘叶;有机酸;脂肪;成分;含量;研究
Results and Conclusion: The first filial generation were all agouti,which indicated that the coat color genes of inbred strain were homozygotes,and the genotype was AABBccDD. 结果和结论 :杂交所生的F1代全部为野生色 ,表明其毛色基因为纯合 ,其基因型为AABBccDD。
It must be taken into consider seriously enough that the application of subway air results in the multiplication of indoor Radon and its filial generation concentration. 通过对地道风中氡及子体来源的分析，及给人体键康造成的危害，提出如何采取技术措施降低地道风中氡及其子体的浓度。
It introduced the influencing factors of pregnant with psychological problems in gestation period and its influences of both on parturient and on their filial generation. 介绍了妊娠期心理问题的影响因素以及妊娠期心理问题对产妇和子代的影响。
The differentiation of neural stem cells and their filial generation and the GABA and Glu protein expression of neurons differentiated from neural stem cells after sodium salicylate administration were evaluated by the method of immunocytochemistry. 通过免疫细胞化学方法染色鉴定神经干细胞及其子代细胞的分化方向和水杨酸钠给药后分化为神经元的细胞的gaba和Glu蛋白表达。
The filial generation，Shanghai No.8，has been one of our commercial strains and widely released in China.Protoplasted monokaryon technique is an effective way in breeding of Lentinula edodes. 它具有优质、高产、抗逆性强和栽培适应性广等特点，已开始在我国香菇主产区应用，成为香菇主栽种之一。
The result shows that there is a great difference in DBH and wood volume weight among filial generations. 研究了10年生杉木杂交后代试验林的胸径生长和木材体积质量的遗传变异规律。
first filial generation of SPF Penaeus vannamei SPF南美白对虾子一代
First filial generation of hybrid 杂一代
Her age is of secondary interest. 她的年龄不太重要。
She had done her filial respect to her mother. 她已经对母亲尽了孝心。
offspring of a first filial generation test cross 第一子代杂交试验的后代
Besides providing genetic substance for filial generations,germ cells of the female individuals provide nutrient substance for the development of spermoviums in the oviparous animals. 在卵生动物中，雌性个体生殖细胞不仅为子代提供遗传物质基础，还必须为受精卵的进一步发育提供营养物质。