无融合生殖

Studies on genes related to embryo and endosperm development are leading us to an extensive understanding of the mechanisms of seed development and apomixis at the molecular level, which will benefits the research for yield and quality improvement of plant seeds via genetic engineering.

对胚和胚乳发育相关基因的研究，可使人们在分子水平上解析种子发育和无融合生殖的分子机制，更有效地开展植物种子产量和品质改良的基因工程。

The rale of plants with 42 chromosomes was up to 49.3%. The va riation of chromosome may have a connection with apomixis.

杂种后代的体细胞染色体数目的变化一方面与远缘杂交有关，另一方面可能与无融合生殖具有一定的联系。

This paper discussed the sorghum apomixis type, occur mechanisms, genetic research and breeding prospects and for the eventual realization of sorghum heterosis fixing provides a theoretical basis and a reference for the study of other crops.

论述了高粱无融合生殖类型、发生机制、遗传研究及其育种前景，为最终实现高粱杂种优势固定提供理论依据，也为其他作物研究提供借鉴。

Apomixis is a means of asexual reproduction by which plants produce embryos without meiosis and fertilization; thus the embryos is of clonal, maternal origin.

无融合生殖是指不经减数分裂和受精作用而产生胚的一种无性繁殖，因此是胚的克隆，母系繁殖。

SSR analysis indicated that triploids were derived from nucellar apomixis; diploids were most probably from sexual crosses of haploid female gametes and alien pollen grains.

SSR分析结果表明三倍体后代来源於柑橘珠心细胞的无融合生殖，而二倍体个体很可能是单倍体的雌配子与外界花粉杂交后代。

The cultured strawberry had the possibility of somatic apospory apomixes.

栽培草莓具有体细胞非孢子无融合生殖的可能。

The approaches for decreasing the gene flow include chloroplast transformation, pollen sterility, seed sterility, cleistogamy, apomixis, temporal control, and transgenic mitigation.

目前降低外源基因扩散的方法主要有叶绿体转化、花粉不育、种子不育、闭花受精、无融合生殖、暂时性控制及转基因缓和等。

It includes the process whereby a diploid cell of the nucellus develops into an embryo giving a diploid seed with a genetic constitution identical to the parent.

在另一种无融合生殖中，种子从未受精的配子中发育而来，这被称为孤雌生殖。

The applications of chromosome numbers and basic numbers in pteridophyte systematics are reviewed in detail. The significance of karyotype analysis, polyploidy, pogamy, and reticulate evolution in pteridophytic classification, evolution, and phytogeography is also reviewed.

文中论述了蕨类植物染色体数目和染色体基数在系统学上的应用以及蕨类植物染色体组型分析、多倍化、无融合生殖、多倍体复合体及网状进化的研究概况。

The occurrence of apomictic reproductive structures on the leaf of the bog orchid, is of interest

有趣的是在叶状沼兰叶子上发生无融合生殖的结构。

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