无性繁殖

Because of heavy heterozygosity of cassava genome caused by stack propagation and outcross in longtime, the practice of biotechnology would resolve these problems in broad background.

由于木薯是无性繁殖的异花授粉作物，传统育种方法在基因重组方面受到局限；生物技术的应用却能够在很大程度上解决上述问题。

In nature, clones are derived from a single parental organism or cell by mitotic cell division, asexual reproduction, or parthenogenesis.

在自然条件下来源于有丝分裂所产生的单个亲本细胞或生物体，还可能来源于无性繁殖或单性生殖。

Penna asexual propagation model is based on mutation accumulation theory, and was introduced by T.

Penna无性繁殖模型是基于0、1位串技术的种群演化模型，该模型于1995年由巴西人T.J。

Chapter two, the model was based on Penna asexual propagation model, main discusses a model with extragenetic diseases.

本文第二章是在Penna无性繁殖模型的基础上，主要讨论的是一种带有非遗传疾病的模型。

They are all more important in plantation crop as also those which are propagated vegetatively.

它们在种植作物和无性繁殖作物中的影响都是比较大的。

The pathogen is transmitted persistently by the Asian citrus psyllid, Diaphorina citri in Asia. In order to figure out the whole process of Las inside psyllids, and its ill effect on the psyllids.

此病可藉由无性繁殖体的嫁接方式与媒介昆虫来传播，在亚洲地区是由亚洲柑橘木虱 Diaphorina citri Kuwayama 以持续性方式媒介传播。

The results showed that the seed germination and stem apexes growth of the materials was decreased with the increase of NaCl concentration and PYM concentration and treating time.

结果表明：供试种子的萌发率和茎端组织的存活率随培养基中NaCl浓度的上升急剧下降，平阳霉素处理对茎端组织存活率的抑制明显大于对种子萌发率的影响，平阳霉素处理后存活的种子和茎端组织经NaCl胁迫筛选，筛选出耐NaCl胁迫力明显提高的存活苗，存活苗经无性繁殖，可以保持较高的耐NaCl能力。

The redia feeds on snail tissue and buds off other larval stages through asexual reproduction.

雷蚴靠进食蜗牛的组织存活，并通过无性繁殖自身来渡过其幼虫阶段。

Vegetative propapation of nut has been successfully practised for over 2,000 years.

坚果的无性繁殖已被成功地应用了2000多年。

Vegetative propagation of nuts has been successfully practised for over 2, 000 years

坚果的无性繁殖已被成功地应用了2000多年。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。