二倍

According to the formation of the apomitic embryos, apomixis could be divided into three major types: diplospory, apospory and adventive embryony.

按其胚体发生的途径，无融合生殖可分为二倍体孢子生殖、无配子生殖和不定胚生殖三种类型。

The genomic changes occurred form F_1 and the greatest changes of sequence was occurred from S_0 generation to S_1 generation,while,there were miner changes from S_1 to S_2, which indicated that the allopolyploid genome became more stable following the selfing process and the sequence change was a rapid event.

但在S_1到S_2代基因组序列变化比率基本接近，暗示了伴随着异源双二倍体的自交过程，早期基因组表现出稳定的趋势，说明基因组序列变化是一个快速的事件。

Diplobiontic Describing life cycles showing a typical alternation of generations with haploid and diploid somatic bodies.

异型世代：具有典型的单倍体和二倍体世代交替的生活史的现象。

In organisms showing ALTERNATION OF GENERATIONS, the gametes may be produced by mitosis in the haploid generation, or by meiosis in the diploid generation and give rise directly to gametes or gamete-producing cells.

在表现出明显世代交替的生物体中，配子可能是由单倍体世代发生有丝分裂产生，亦可由二倍体世代减数分裂直接产生配子体或配子母细胞。

The difference in genetics reflected by the above three angle between selfed progenies and original amphidiploid was very small.

自交一代与原生双二倍体在三个层次上表现的遗传差异很小。

The seed set of amphidiploid with DAG genome was ...

具其它组型的双二倍体，则表现结实率较低，但具DAG组型的除外。

The amphidiploid was not stable, the segregation existing in its self-fertilizationprogeny.

双二倍体表现不稳定，后代存在较大分离。

Through wide hybridization between wheat and Thinopyrum species, a lot of amphidiploid, addition, substitution and translocation lines were produced and many wheat cultivars were selected.

通过小麦与偃麦草的远缘杂交，创造了大批小麦一偃麦草双二倍体、异附加系、异代换系和易位系材料，选育了许多小麦新品种。

The study on the phylogenetic relations among these species is very useful for the study on genome and marker-assisted breeding in Brassica species. The karyotypic analysis is one of the most important methods in analysing the phylogenetic relation of species with closer relations. The protocol for inducing high frequency metaphase was established by pretreatment with low temperature and 8hydroxyquinoline, and then the preparation of chromosome and karyotypes analysis of six economical important Brassica species were carried out. According to the karyotypic analysis, it was shown that in the genomes of amphidiploid species, there are genomical components from didiploid species. Our result showed that B. campetris, B. juncea and B. napus belonged to class 2B, while B.

以二倍体B.nigra（B，n=8）基因组为探针，用B.campestris（A，n=10）或B.oleracea（C，n=9）的基因组进行封阻，分别与B.juncea（AB，n=18）和B.carinata（BC，n=17）进行GISH杂交发现，B.juncea和B.carinata基因组中仅有来自于B.nigra的8对染色体表现杂交信号，而其它染色体杂交信号较弱；以B.campestris或B.oleracea基因组为杂交探针与B.napus（AC，n=19）进行GISH杂交发现，所有19对染色体均出现杂交信号，根据杂交结果难以正确判断B.napus基因组中的哪些染色体是来自于A基因组，哪些是来自于C基因组；以rRNA基因（18S-5.8S-26S）为探针的FISH杂交结果表明，B.campestris基因组中rRNA基因位点为6对；B.oleracea为3对；B.nigra为2对；B.carinata为4对；B.juncea为6对；B.napus为6对。

Mach two equals twice the speed of sound.

二马赫相当于声速的二倍。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。