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The result indicated, the CIMMYT forage characteristics of the overgrowth, strong tillerity and high yield could inherit to the offspring ,and the inherit ability was higher. It was obviously difference of seedling, plant, and its grow habit, flower apparatus and seed between CIMMYT forage and common maize. The hybrid offspring of CIMMYT forage and common maize keep the strong trait of growing and development, but the flower and seed character were look like common maize. The backcross offspring were not different to common maize besides with some tillers, distinct multi-ear and atavism.

结果表明,CIMMYT牧草能将其生长繁茂、分蘖力强、生物产量高的特性遗传给杂交后代,并有较强的世代传递能力;该牧草幼苗、植株及其生长习性、花器官、种子特征等与普通玉米差异明显,其与普通玉米的杂交后代基本保持了它的生长发育特性,但花器官和种子特征更偏向于普通玉米;回交后代除保持了一定的分蘖特性、明显的多穗和返祖现象外,其余特征特性与普通玉米基本没有区别。

In the crosses of the autotetraploidy rices used as the females, some seeds could be got, but more seeds were obtained in these crosses by the special treatment that the DH solution was put into the caryopses before the pollination.

在以同源四倍体水稻为杂交母本的杂交组合中,可以获得一些实粒种子,但是,如果在授粉前利用DH溶液对同源四倍体水稻的去雄颖花进行处理后再授狼尾草的花粉粒则能获得更多的实粒种子。

Rhizoctonia cerealis was the most inhibited (89.3%) among the 11 species. A dry seed treatment of α-pyrone 0.2% WP at 0.5% controlled wheat root rot 61.6% and cotton damping-off 85.6% in the greenhouse; these re...

温室条件下用干种子量0.5%的0.2%α-吡喃酮WP拌种处理对小麦纹枯病的防治效果达61.6%,对棉花立枯病的防治效果达85.6%,较干种子量1%的40%多菌灵拌种处理防治效果分别提高了14.6%和17.9%。

The emerging savanna seed collection, on the other hand, was "multicolored handfuls of lumpy, oozy, glop," ripe with pulpy seeds and dried fruits.

而新收集的热带稀树大草原的种子是"色彩斑斓凹凸不平、渗水的、软胶质的",成熟后的种子多汁,结有干果。

The female parents are 4 choice [1] ness clones in Chinese fir primary orchard. The male parents are 3 polyanthus clones in the gene pool of old Chinese fir, the mixed pollen of these clones and all the clones in this gene pool. The testing woods were founded with 18 cross grouping which were obtained by the using of NCⅡ.

以经过子代测定的杉木初级种子园中的4个优良无性系为母本,老杉木种质资源库中的3个花芽较多的无性系及其混合花粉和种子园混合花粉为父本,采用测交系交配设计进行杂交制种,获得18个杂交组合并以此营建试验林。

A provenance trial has been carried out in eleven replications in southeastern China on slash pine of fifteen seed sources from Alabama, Florida, Georgia, Louisiana, Mississippi and South Carolina of the United States of America.

湿地松是一个有发展前途的速生树种。1982年我们利用从美国国际林木种子公司进口的批量生产的种子进行种源试验。该批种子来自美国6个州的15个产地。通过多地点试验,以了解这批种源的遗传品质,比较不同种源的生长表现与适应能力。

Lodicules of the CMS lines with lighter CGG had more, bigger and unequal tracheae in SVB, and had bigger volume, heavier weight and lower water potential compared with the CMS lines with CGG. Similar to CMS lines, the B-lines had similar changes.

与种子裂颖重的不育系相比,种子裂颖轻的不育系浆片小维管束导管面积大、数目多且分布均匀、体积小、重量轻、水势低;且相应保持系也表现出大致相同的规律。

In recent years, many studies have suggested that the selective pressure be-tween dispersers and plants is rather weak.

然而,食果动物和植物一对一的协同进化的例证并不多见;适合种子萌发和生长的环境在时空上难以确定;食果动物和植物的进化速度不一致;植物与种子传播者的选择压力存在着高度的不对称和不平衡,加上环境因素的重要影响,这种选择压力受到极大的限制而有可能变得不显著。

BACKGROUND: Research on seed cells is the most important aspect in the filed of tissue-engineering research, and because of their various ad vantages, bone marrow mesenchymal stem cells have been taken as the ideal bone tissue-engineering seed cells.

背景:种子细胞的研究是组织工程众多研究领域中最重要的基础环节,骨髓基质干细胞以其诸多优点,成为理想的骨组织工程的种子细胞。

One hundred and thirty four families, 578 genera and 1197 species are recorded in this area. According to the information of historical geology and natural conditions, the composition of seed plant flora and the areal-types of genera were analyzed. The results showed that its origin was rather ancient and its geographical compositions were complicated. There were many species of rare and endangered plants, e.g. Taxus chinensis var. mairei, Bretschneidera sinensis, Emmenopterys henryi, Fokienia hodginsii, Torreya grandis, Phoebe bournei, Ormosia henryi, and so on. Most of these plants had high value in economics and scientific research. According to statistics and analysis of genera in the present flora, 578 genera were divided into 14 areal-types. The ratio of tropical and temperate genera was respectively 48.6% and 49.2%, so its flora was characterized by transitional floristic elements, and in wide connection with the world.

该地区植物种类丰富,共有野生种子植物134科、578属、1197种;根据地史资料和自然条件,通过对种子植物种类的组成和分布区类型的分析,认为该区系起源古老,区系成分复杂;珍稀特有植物多,如南方红豆杉、钟萼木、香果树、福建柏、榧树、闽楠、花榈木等大量古老树种,并且绝大多数具有重要的经济价值和科研价值;区内578属可分为14个类型,热带和温带分布的属分别占48.6%和49.2%,具较明显的南北过渡的现象,与世界各地有广泛的联系。

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