查询词典 tetraploidy

In this paper, the male reproductive system of this species was investigated by light microscopy, and electron microscopy, and the tetraploidy embyros of the prawn were induced by heat shock treatment.

本文应用组织学、电子显微镜、细胞遗传学及多倍体诱导技术对日本沼虾雄性生殖系统、染色体及核型、多倍体产生的条件等进行了比较深入的系统研究，对于解决人工授精难题和培育出品质优良的养殖品系具有重要意义。

In 8 cases, both the results were consistent excepting for minor discrepancies.③In 3 cases, including 2 each with triploidy and tetraploidy respectively, and one with chimeric karyotype of normal/+22, the results from the two methods were discrepant.

CGH与常规R带的分析结果比较可分为三种：①CGH和常规核型分析结果完全一致的有3例；②CGH分析和R带分析从不同角度提供了相对一致信息的有8例；③CGH分析和R带分析结果不一致的有3例，其中2例分别为约三倍体和约四倍体，另1例为正常/＋22嵌合型。

The optimization of heat shock conditions for producing tetraploidy loach was treated the fertilized eggs for 4 min with 41℃ water after fertilization about 20 minutes.

采用热休克抑制受精卵第一次卵裂、Ag-NOR计数鉴定四倍体胚胎的方法，探索了诱发四倍体泥鳅的最佳条件是：在受精后20 min左右采用41℃热水持续处理泥鳅受精卵4 min。

Variation of tetraploidy was observed among the regenerants from culture of immature cotyledons,cotyledons and leaves of melon seedlings.

甜瓜未成熟子叶、幼苗子叶和真叶离体培养的再生植株中存在着明显的四倍体变异，比率分别为30%、16.2%和 42.9%。

Since F3, the tetraploidy was maintained from one generation to another and to date FH allotetraploid hybrids were producedF:!

四倍体鱼不但兼有父母本的扩增带，而且也有变异，为四倍体鱼是异源四倍体而不是同源四倍体提供了分子生物学证据。

With the stable genetic tetraploidy and the fertility in the nature environments, this allotetraploid population presented the key factors to form a new species with 200 chromosomes.

异源四倍体鲫鲤稳定的染色体数目和正常的性腺结构以及自然条件下的生殖传代行为，说明该异源四倍体鲫鲤已成为一个染色体数目为4n=200、遗传性状稳定的新型四倍体鱼群体，具备形成新种所需的关键因素。

With the stble genetic tetraploidy and the fertility in the nature environments, this allotetraploid population presented the key factors to form a new species with 200 chromosomes.

异源四倍体鲫鲤稳定的染色体数目和正常的性腺结构以及自然条件下的生殖传代行为，说明该异源四倍体鲫鲤已成为一个染色体数目为4n=200、遗传性状稳定的新型四倍体鱼群体，具备形成新种所需的关键因素。

Pooling together thedata from comparing the 4x original varieties with their corresponding 2x varietiessince 1979,it was found,that tetraploidy could cause variation of manyagronomic traits.

自1979年对四倍体水稻原种(4x)和相应的二倍体水稻品种(2x)进行了对比，结果发现，四倍体水稻原种的许多农艺性状发生了变化。

The contents of crude protein and 18 kinds of amino acids in the powder of tetraploidy black locust for fodder leaves at four stages,from which Langfang,Hebei Province,were determined.Their value for feeding were evaluated by means of amino acid scores and essential amino acid index.

测定了廊坊地区饲料型四倍体刺槐叶粉4个不同时期的粗蛋白质含量及18种氨基酸组分，用氨基酸分和必需氨基酸指数对其氨基酸营养进行评价，并结合其生物量对最佳刈割时期进行了分析。

Supposing the research areas are coverd with tetraploidy black locust forest totally with same density (2*2m), the total water consumption in growcrop are 465.3mm.

4假定研究区全部为四倍体刺槐所覆盖(密度为2×2m)，其林分生长季耗水量为465.3mm。

If you are committed to an education career, then the Master of Arts in Education from Ashford University is for you.

如果你是致力于教育事业，那么，艺术教育硕士学位阿什福德大学是给你的。

objective:to explore the expression of survivin protein and its mrna in rectal cancer and their clinic significance.

目的：研究凋亡抑制因子survivin蛋白及其mrna在直肠癌组织中的表达及其与临床病理关系。