姊妹关系

During the postgenomics era the information about genomic sequence and gene functions provides a new foundation for evolutionary biology and ecology As the first whole-genome sequenced plant Arabidopsis thaliana and its wild relatives have played a critical role in understanding the evolution of genomics and speciation Both A halleri and A lyrata are closely related to the model species A thaliana A halleri ssp gemmifera occurs in northeastern China Japan and Taiwan; while its sister A halleri ssp halleri is mainly distributed in Europe Geographical barriers such as Tienshan Mountain Range isolate these intraspecific sisters Likewise A lyrata ssp kamchatica and ssp lyrata occur in East Asia and North America respectively Such distribution patterns seem to be consistent with allopartic speciation The comparison between ancestral and extant polymorphism by multilocus can be informative about the population genetics of speciation In this study we collected and analyzed DNA sequences of 98 genes from four wild relatives of A thaliana A halleri ssp gemmifera A halleri ssp halleri A lyrata ssp kamchatica and A lyrata ssp lyrata The ancestral states of these four species were compared to each other in terms of level of genetic variation However the ancestral species at the time of speciation were substantially more polymorphic than the extant geographical populations The observations are not fully compatible with speciation by strict allopatry At some species pairs parapatric speciation seems more reasonable in speciation of Arabidopsis The 98 gene sequences are also used for the congruence test between gene genealogy and species phylogeny Only 28 genes support the species phylogeny but there are 23 genes supports another major genealogy { lyrata} thaliana Based on the phylogenetic position change of A lyrata ssp kamchatica and Ks value for each species pair suggested the recent directional gene flow between A halleri ssp gemmifera and A lyrata ssp kamchatica

阿拉伯芥是第一个完成基因体定序的开花植物，其基因体资讯提供植物学研究的重要依据；在解析阿拉伯芥属物种的亲缘关系以及种化机制等重要的演化议题时，阿拉伯芥近缘的野生物种自然成了不可或缺的关键；跟阿拉伯芥近缘的物种包括A halleri及A lyrata，其中A halleri ssp gemmifera主要分布於中国东北、日本以及台湾，与近缘的A halleri ssp halleri其分布於欧洲隔著天山及大陆的障蔽，而A lyrata ssp kamchatica主要分布於东北亚及台湾，与分布於北美五大湖的A lyrata ssp lyrata被北极圈所分隔，这样的分布模式暗示异域种化的可能。藉由多基因分析比较祖先物种与现生物种遗传歧异度的相关可提供讯息探讨种化时期的族群遗传结构，本研究针对A halleri ssp gemmifera、A halleri ssp halleri及A lyrata ssp kamchatica、A lyrata ssp lyrata四个物种，两对互为亚种的姊妹群，以阿拉伯芥为外群进行研究，在四个物种完成98个同源基因的分子序列，利用套装软体MCMCcoal来估算祖先物种的遗传变异，亦估算现生物种的核苷酸歧异度，观察到？多物种配对中祖先物种遗传多型性大於现生物种DNA歧异度，显示异域种化模型并无法完全解释阿拉伯芥属物种的种化模式，在某些物种配对间邻域种化模式应比异域种化更为可能；在基因树与物种树的比较，98个基因片段的亲缘模式只有28个是与已知物种树一致的，有23个基因其树状图支持{ lyrata} thaliana的型式，藉由kamchatica位置的变化以及估算各物种配对间的平均同义置换率，推测在A halleri ssp gemmifera与A lyrata ssp kamchatica间具有近代的单方向基因交流。

And if I felt, when I recently finished, that I had at last come to grips with the major issues of identity formation, I also discovered as soon as I let my parents and siblings read the result that however much I had achieved resolution on the page, in the family realm -- the force-field of origins -- I had only confirmed my troubled apostasy.

如果说在回忆录最近脱稿时，我自忖对形成归属感的诸多基本问题终于有些领悟的话，那么在父母亲和兄弟姊妹看了我写下的体验后，我倏然发现，面对家庭关系和祖籍观念的制约，无论我通过文字描述了多少化解之道，只不过证实了我背离这一切的艰难曲折。

The results of three cladistic methods showed: the consanguinities of different genera in a same tribe were closer, such as Chalcis and Conura, Trigonurella, Megalocolus and Trigonura; the consanguinities of genera between different tribes were farther, such as Chalcis and Brachymeria, Dirhinus and Hallichella; Chalcis, Conura, Brachymeria and Epitranus were the most primitive relatively, Tainaniella and Oxycoryphe were the most evolutional, the consanguinities were the farthest between the former and the latter; the genera with the closest consanguinities were: Tainaniella and Oxycoryphe, Proconura and Nipponochalcidia, Chalcis and Conura, Megalocolus and Trigonura, they were regarded as 4 pairs of sister groups.

三种支序分析方法一致支持的结果为：同一族内成员之间亲缘关系较近，如小蜂属和卡诺小蜂属，微三角小蜂属、细尾小蜂属和三角小蜂属之间；不同族内成员相互之间的亲缘关系则较远，如小蜂属和大腿小蜂属之间，角头小蜂属和截胫小蜂属之间；小蜂属、卡诺小蜂属、大腿小蜂属和脊柄小蜂属相对最为原始，而泰内小蜂属和背突小蜂属最为进化，前者和后者之间的亲缘关系最远；亲缘关系最近的有：泰内小蜂属和背突小蜂属，泊卡小蜂属和日本小蜂属，小蜂属和卡诺小蜂属以及细尾小蜂属和三角小蜂属，它们各自之间都构成姊妹群关系。

Staying at Newstead in 1802, he probably first met his half-sister, Augusta Leigh with whom he was later suspected of having an incestuous relationship.

停留在 newstead 在1802年，他大概是第一次见到他的半姊妹，奥古斯塔李同他后来被怀疑有乱伦关系。

The conversion boundary of self-incompatibility was researched by sowing by stage. Sunshine of day and temperature was studied critically by investigating leafage and researching traits indoors. The results showed that the daily minimum temperature was the principal factor of affinity conversion and the affinity conversion boundary was 16.5~18.1℃.HE97 was primarily regard as self-incompatible line in this research. The method was by inbreeding and sib HE97, Half the silk of HE97 and Zheng58. Inbreeding and cross have been done simultaneously. The extending condition of pollen tube was observed by dying the silk after pollinating 4 hours. The individuals with pollen tube were observed having seeds, while the individuals without pollen tube were observed having few seeds or no seeds. So this study regard HE97 as sporophytic self-incompatibility .The planting ration of female parent HE97 and male parent 87-1 was 4:1.The nature cross-pollination was studied by the theory of endosperm xenity, the study show that the setting percentage of HE97 was 625%, in which the seed in self was 70% and the seed in hybrid was 30%. This was consistent with the study of silk anatomy structure, then come to the same conclusion: compatible pollen germination and fertilization can stimulate the self-incompatible pollen germination and fertilization in the same corn cob.

通过分期播种，进行了光温敏自交不亲和材料HE97亲和性转换区间的研究，依据田间跟踪调查叶龄及室内考种研究了HE97亲和性转换区间的光温临界值，结果表明：1日最低温度是影响HE97自交不亲和性的主要原因，亲和性转换区间在16.5℃～18.1℃之间。2通过HE97自交和姊妹交以及将HE97与郑58作为双亲，各自的花丝一分为二，分别正反交，授粉后4个小时分别取其花丝进行固定、染色，观察花粉管的伸长情况，根据结实率与花粉管伸长的对应关系，结果发现观察到花粉管的对应植株收获到了种子，而没有观察到花粉管的对应植株结实率极低或没有结实，本研究把HE97初步划为孢子体自交不亲和类型。3以HE97为母本，87-1为父本，按4母：1父行比，通过花粉直感效应研究天然异交率，结果母本HE97结实良好(62%)，其中自交粒占70%，异交粒占30%，结合花丝切片观察表明，亲和花粉的萌发及受精会导致落在同一果穗柱头上不亲和花粉的萌发不再受抑制。

Your main lesson is to develop magnanimity and a feeling of brotherhood.

妳今生主要学习的课题是敞开心胸和成为一种兄弟姊妹关系的感觉。

How do you grade your relationship with your sibling?

你会怎样评定你与兄弟姊妹的关系？

Many British towns are so pleased with the results of their first twinning that they set out to find other twin towns.

许多英国城市对首次结成的姊妹城的结果感到非常满意，于是就开始寻求与更多的城市建立姊妹城关系。

She attributes her designs' wearability to her relationships with real-life women such as her sister.

她将自己设计的实穿性归功于她和一些真实生活中的女性──如她姊妹──的亲密关系。

The results of the phylogenetic cladograms indicated that Apanteles adoxophyesi Minamikaws and Apanteles angaleti Muesebeck are monophyletic group, Apanteles adoxophyesi Minamikaws % Apanteles angaleti Muesebeck and the remain 8 species make up a monophyletic group or paraphyletic group.

支序系统学研究结果证明安氏绒茧蜂Apanteles angaleti Muesebeck和茶小卷蛾绒茧蜂Apanteles adoxophyesi Minamikawa存在着亲缘关系，并形成单系群，与其它几种绒茧蜂形成姊妹群关系或并系群关系。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐