是否依靠一个无性系的杂合性就足够了？
Will it be sufficient to rely on the heterozygosity of one clone?
对美国黑核桃1 4个良种无性系的结果习性进行了初步调查。
A primary investigation is conducted on fruiting habit of 14 improved variety clones of Juglans nigra L.
在这些家系中不同无性系被大量地繁殖，也没有进行无性系的测定。
Various clones families could be propagated commercially without having been clonally tested.
对于用作授粉亲本的一些无性系的选择，不得不采用一种折衷办法。
A compromise has to be made as to the choice of clones to be used as pollen parents.
采用试管苗瓶外袋生根技术，无性系的平均生根率可达83.86%。
The rooting rate can reach 83.86% in plastic bag with sail medium.
北京盆栽无性系生长趋势与高唐相似，但部分无性系的生长量上存在很大差异。
In Beijing, majority of clones growing trend were in agreement with Gaotang district, however, several varied considerably.
根据纤毛原生动物无性系的寿命的定义，灵芝的内含物延长了棘尾虫无性系细胞的寿命。
According to the definition of the life-span of ciliated protozoan clone, the component of Ling-Zhi prolonged the life-span of the clonal cells of Stylonychia mytilus.
苯丙氨酸解氨酶的株间差异相对较小，但在总体水平上，抗病无性系的酶活性和比活性也比易感株略高。
Phenylalanine ammonia lyase activities of the resistant clone needles, in general, were also a bit higher than those of susceptible individuals.
研究结果表明，水分资源供应水平越高，斑苦竹无性系的总生物量越大，同时，无性系分株的数目越少，而个体增大。
The results show as follows: 1. Clonal P. maculata accumulated more biomass and produced less but larger ramets under higher levels of water resource supply.
来自抗病无性系的愈伤组织也表现抗病。 愈伤组织抗病性表达受培养基的激素浓度及比例、病原菌的接种量和接种温度影响较大；
The expression of poplar disease resistance in callus tissues is greatly affected by concentration of auxins and cytokinins in the medium, inoculum density and temperature.
迄今种子园中开花株数和雄球花产量稳定增长，多数无性系植株平均着花量约在700个上下，但仍有约半数无性系的1/3植株尚未开雄球花。
There were about 700 male flowers per bearing tree for most of clones, but 46% of clones had 1/3 ramets bearing no male flower at all.
对广西杉木无性系的总花量与树高、胸径、冠幅、冠高、树冠表面积进行了遗传相关及通径分析分析表明：总花量与生长性状之间的遗传相关系数均为负值；
The gross flowers and height, diameter, crown width, crown height, crown surface of Chinese fir clones in Guangxi area were investigated by genetic correlation analysis and path-coefficient analysis.
在昆明试验点测定林保存完好的无性系中，直干桉有5个、蓝桉有3个无性系的材积超过对照（实生木） ，其中超过30 %有6个（直干桉4个，蓝桉2个）。
In those clones maintained completely, the volume of 8 clones (5 E maidenii and 3 E globulus) exceed that of the control and of which 6(4 E maidenii clones and 2 E globulus ) exceed by 30% in Kunming.
体细胞无性系变异已获得一些作物专利，并以此作为一种手段来产生可供选择的遗传变异，且假定该作物一旦移植生长，它的基因稳定。
Somaclonal variation has been patented in some crops as a means of producing genetic variability for selection, and it was assumed that the crops were genetically stable once established.
体细胞无性系变异发生在组织和胚胎的培养，即使没有基因改造，但基因改造往往使情况变得更糟。
Somaclonal variation occurs in tissue and embryo culture even without genetic modification, but genetic modification often makes it worse.
就单棵树(individual tree)来说Pando并不是最古老的树，但是生长在犹他州的无性系颤杨(QuakingAspen)确又的确是最古老的。
While Pando isn't technically the oldest individual tree, this clonal colony of Quaking Aspen in Utah is truly ancient.
我们过去都是靠种籽来培育新一代的种苗，但世界银行建议采取无性系种苗扦插技术，这样产生的种苗遗传增益高多了。
We used to rely on seeds to grow the next generation of trees but the World Bank proposed the use of cloning seedlings. This led to a much higher yield.
粮农组织国际杨树委员会与泗阳合作栽培杨树的历史可以追溯到20世纪70年代，当泗阳县首次从意大利引进32棵杨树无性系之时。
The history of Syiang's cooperative partnership in poplar cultivation dates back to the 1970s, when Siyang County first imported 32 poplar clones from Italy.
野大麦属短根茎丛生型禾草，是典型的无性系植物。
Hordeum brevisubulatum is a typical clonal plant of grass family with short rhizome.
经过10 ~15年无性系测定后，常常将属于几个家系的25 ~50个无性系混合起来，大量投入生产使用。
After 10 to 15 years of clonal testing, mixture of 25 to 50 clones, often belonging to several families, have been released for commercial use.
对无性系变异的应用进行了讨论。
The application of the somaclonal line variation has been discussed.
繁殖无性系也可以在较短期间内提供较大的增益。
Clonal propagation can also give some large gains in a relatively short time.
通过选择优良无性系，组建综合品种的途径有利于根蘖性状提高。
The way to set up synthetic variety by selecting good colone is of benefit to developing creeping rooted charcter.
结缕草无性系各分株的发育时间基本相同。
这些群体的无性系按完全随机区组设计种植。
The clones of these populations were grown in randomized complete-block design.
不同无性系在分蘖株和根茎的生长、生产及物质贮藏上具有相对的一致性。
There was relative consistency between different clones in the growth, production and matter storage of tillers and rhizomes.
说明从中选择优良无性系是可能的。
同时利用指数分析法对杨树新无性系干形的优劣进行了综合评价。
Moreover, it was carried out that tree stem forms were valued by index method analysis for each new poplar clones.
同时利用指数分析法对杨树新无性系干形的优劣进行了综合评价。
Moreover, it was carried out that tree stem forms were valued by index method analysis for each new poplar clones.
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