无融合生殖

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。

In this paper,a list of apomitic species of Paspalum is given.The cytological and embryological bases,and the characters of apomixis are described.Advances in genetics and molecular biology of apomixis aye in Paspalum also reviewed.

对雀稗属无融合生殖的分布、无融合生殖相关的细胞学和胚胎学基础、无融合生殖的特点及其遗传学和分子生物学研究进展进行了综述。

Therefore, the use of apomixis also holds great promise as an essential tool for plants sustainable agricultural production and economic crops improvement in the 21 century.

无融合生殖在作物育种上之贡献为能迅速稳定杂种优势并降低杂交种子的生产成本，得以在 21 世纪应用无融合生殖於农业和经济作物改良。

The reproductive glands of male fishes when filled with this fluid.A plant that reproduces by or is reproduced by apomixis.

无配生殖植物，无融合生殖植物可进行无配生殖的植物或由无配生殖产生的植物

Since curly leaf hybrid could be recognized at early stage,and displayedobvious dwarfness,choosing"Zha′ai 76"as paternal parent not only raised thehybrid-selecting efficiency from the pollinated progenies,but also raised thebreeding efficiency of apomctc dwarf roostock of apple.

鉴别宽叶型杂种较难、需时较长(2-3年生时)并需与染色体倍性鉴定法相结合，因其形态变化较小而生长势又与平邑甜茶无融合生殖苗无明显差异；鉴别光叶型杂种因父本染色体组的影响加大而从形态上容易些，但也需过氧化物同工酶法或染色体倍性鉴定法相配合；皱叶型杂种因在苗期刚出1-2片真叶时就表现明显的标志性状、能从叶片形态上准确鉴别出来，毋须染色体倍性鉴定等复杂方法；因皱叶型杂种能早期鉴别，又表现明显的矮生性，因而选用"扎矮76"做父本不仅大大提高了平邑甜茶授粉后代中选择杂种的效率，而且提高了苹果无融合生殖型实生矮砧育种的效率。

In this paper, a list of apomitic species of Paspalum is given. The cytological and embryological bases, and the characters of apo...

对雀稗属无融合生殖的分布、无融合生殖相关的细胞学和胚胎学基础、无融合生殖的特点及其遗传学和分子生物学研究进展进行了综述。

Crosssing apomictic rice and C4 crop,such as Sorgum,Trapsicum and Panicum maximumespecially by somatic hybridization and gene engineering technique to create new varieties with characteristics of apomixis and high photosynthetic efficiency.

利用无融合生殖水稻与无融合生殖高光效的C4作物，如高粱、摩擦禾、木黍等杂交，特别是体细胞杂交和基因工程技术，创造具有无融合生殖特性高光效作物新品种。

The apomictic research progress in plants is summarized, including the approaches of fixing heteroses, selecting and breeding of plant varieties and apomictic materials, embryology, genetics, apomictic characteristics and so on .

介绍了植物无融合生殖在选育无融合生殖品种及育种材料方面的成果；概述了植物无融合生殖在胚胎学、遗传学及生殖特性，杂种优势固定途径及无融合生殖材料选育途径等方面研究的现状和趋势。

It was confirmed that facultative apomixes is existed in coffee species based on emasculating treatment, cyto-genetic observe and SSR marker detection.

细胞遗传学观察发现咖啡四倍体类型材料(2n=4x=44)的多胚和多胚苗中含有天然的单倍体胚和单倍体小苗(2n=2X=22)；去雄处理后，可见子房膨大，其中5份材料获得了果实和种子，初步说明无融合生殖现象的存在；对小粒种品种间杂交F1代个体的SSR分析，发现多胚苗中存在与母本图谱相同且不携带父本特异带的后代以及携带双亲特异带的有性后代，表明子代有仅来自母本的无融合生殖个体分离出来。 3 建立了咖啡无融合生殖的分子鉴别方法。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失