Some 60 of monocotyledons and 40 of dicotyledons are polyploid , as are 90 of ferns , many bryophytes , and some algae 60的單子葉植物和40的雙子葉植物、 90的蕨類植物、多數(shù)苔蘚植物以及某些藻類,都是多倍體。
Allopolyploids usually arise from the doubling of chromosomes of a hybrid between species , the doubling often making the hybrid fertile 異源多倍體通常由不同種的二倍體染色體組結(jié)合后加倍形成,染色體加倍后通常是可育的。
Medicinal polyploid plants attract great attention because of their gigantic organs , high yields and important medicinal and economic values 摘要多倍體藥用植物因器官巨大,產(chǎn)量高,具有重要的藥用和經(jīng)濟(jì)價(jià)值而倍受人們的關(guān)注。
Polyploids generally thaw some good characters , for example , vigorous plant , higher biological yield , bigger seed , good quality and special resistantance 多倍體植株具有生長(zhǎng)勢(shì)強(qiáng)、生物學(xué)產(chǎn)量高、籽粒大、品質(zhì)好和抗逆性強(qiáng)等特點(diǎn)。
Method : induction of polyploidy by colchicine treatment is efficacious , and part of the doubled plants were identified as homologmous tetraploids 結(jié)果表明:用秋水仙堿誘導(dǎo)菘藍(lán)多倍體植株是有效的,已有部分植株已加倍成為同源多倍體。
The technically effective system in inducement of cereal polyploid will conduce to creating a lot of new genetic resources with polyploid characters 建立多倍體誘導(dǎo)的高效性實(shí)用技術(shù)體系,將有助于盡快獲得大量的多倍體材料和新的遺傳資源或種質(zhì)資源。
Endomitosis the duplication of chromosomes without division of the nucleus , causing polyploidy and leading to an increase in nuclear and cytoplasmic volume 核內(nèi)有絲分裂:在細(xì)胞核不分裂的情況下進(jìn)行染色體復(fù)制,產(chǎn)生多倍體并使細(xì)胞體積增大的一種有絲分裂形式。
The properties of the hybrid , such as greater vigor and adaptability , are retained in the allopolyploid in subsequent generations and such organisms are often highly successful 這種具有高度生活力和適應(yīng)性的雜交在異源多倍體中被保留,而且可以成功的遺傳下去。
In this article , ways of polyploidy breeding , the identification of polyploidy , application of watermelon polyploidy , and the prospective of watermelon polyploid breeding are reviewed 文章概述了西瓜多倍體的產(chǎn)生途徑、鑒定方法,西瓜多倍體育種的應(yīng)用以及研究新動(dòng)向。
There exist three limitations , i . e . , the limitations in ideology , materials ( the number or the type ) and technical approaches , in the research of autopolyploid rice 摘要在同源多倍體水稻的研究中存在3大局限勝,即思想觀念的局限陣、材料數(shù)量(或材料類型)的局限性和技術(shù)思路的局限性。