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配子生殖

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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。

It was suggested that the capacities of parthenogenesis and apogamy of rice were used to obtain stable lines in early hybrid generations.And several characteristics such as apomixis,cleistogamy,superior genes of qualities and resistance to disease and pest were combined and were used to search a new pathway of selecting high yield,superior quality and heteroresistance to diseases and pest,and lead to realize the purpose of fixing heterosis by apomixis.

利用水稻的孤雌生殖和无配子生殖能力,获得早世代稳定品系,建立快速育种方法,把无融合生殖特性与闭颖授粉、优质、抗性等特性结合探索高产优质多抗育种新途径,逐步实现利用无融合生殖固定杂种优势的目的。2。

The life-cycle of C.baileyi in Beijing duck and in the CAM of chicken embryowas studied with both the light-microscope and the Nomarski interference-contrastmicroscopy.The results indicated that the life-cycle within duck was simillar tothat of CAM.It included excystation, merogony,gamogonyand sporogony.The thin-walled oocyst was first observed and described in China.

借助普通光学显微镜和微分干涉显微镜对C.baileyi在北京鸭体内的生活史和在鸡胚绒毛尿囊膜上的生活史进行了较详细的研究,结果表明:C.baileyi在北京鸭体内和在CAM上的生活史相同,主要包括"脱囊—裂殖生殖—配子生殖—孢子生殖"四个阶段。

In particular, it has remained unclear how oogamy arose from isogamy, a more simple form of sex in which ery similar reproductie cells take on different "mating types" but do not differentiate as distinct sperm and egg.

尤其是异配生殖如何由同配生殖转化而来,我们对此还懵懵懂懂。同配生殖是一种更为简单的结合形式,在此过程中,非常相似的生殖细胞不管三七二十一地就与不同的配子结合,都不分这些配子是"公"是"母"。

E.stigmosa completed merogony and began gamogony at about 108th h post-infection, and all endogenous stages developed intranuclearly in epithelial cells.

在感染后第108h左右,多斑艾美球虫完成裂殖生殖并进入配子生殖阶段。

Cytoembryological studies were employed to reveal theorigin of haploid and to determine the cytological factersrelating to the production of diploid polyembryony withinone embryo sac occurring in natural population of apolyembryonic line SB-1 of O.sativa.

SB-1自然群体中的单倍体来源于助细胞无配子生殖。细胞胚胎学研究表明,卵器中的一个或两个助细胞能在受精之前发育成胚,其发生率分别为观察子房数的2.24%和1.75%。

The apogamic of synergid was not observed.

没发现助细胞的无配子生殖

In their new work, the researchers established a genetic connection between male sexuality of an oogamous multicellular green algae species, Pleodorina starrii, and one of the mating types of its isogamous ancestor, the unicellular alga Clamydomonas reinhardtii.

在这项最新研究中,研究人员让一种异配生殖多细胞绿藻(Pleodorina starrii藻)与其同配生殖单细胞祖先(Clamydomonas reinhardtii藻)的其中一种配子类型进行雄性配子结合,从而建立两种藻类的遗传学联系。

In particular, it has remained unclear how oogamy arose from isogamy, a more simple form of sex in which ery similar reproductie cells take on different "mating types" but do not differentiate as distinct sperm and egg.

尤其是异配生殖如何由同配生殖转化而来,我们对此还懵懵懂懂。同配生殖是一种更为简单的结合形式,在此过程中,非常相似的生殖细胞不管三七二十一地就与不同的配子结合,都不分这些配子是&公&是&母&。

Reproduction by the fusion or conjugation of isogametes, as in certain algae and fungi.

同配生殖由同形配子的混合或接合而发生的生殖,如在海藻和真菌中进行的生殖

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This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。

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