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   chromosome chromosome 在 农作物 分类中 的翻译结果: 查询用时:0.009秒
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chromosome chromosome
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  染色体
    2. After Rice seeds treated by 14C ion, 7Li ion and 60Co- Y ray, root tip cells brought obvious aberration such as: micro kernel, karyon conglutination, karyon abnormality, chromosome bridge, laggard chromosome, orbicular chromosome, chromosome separation unequally and chromosome poles abnormity.
    2 用~(14)C离子、~7Li离子和~(60)Co-γ射线处理水稻种子后,根尖细胞产生明显的变异,主要有微核、核粘连、核畸形、染色体桥、落后染色体、环状染色体染色体不等分离、染色分极异常等。
短句来源
    2. We observed the chromosome aberrance of D1 and D2 with λDNA introduced lines in the stage of pollen mother cell (PMC) meiosis. The results showed that both of the D1 and D2 lines had appeared the chromosome aberrances which including single chromosome, chromosome lagging, chromosome bridge, excessive bally dividing etc.
    2.对导入λDNA的中国春D_(1)、D_(2)代进行细胞学观察,观察到了单价体、染色体落后、染色体桥、微核和细胞多极分裂等异常现象。
短句来源
    The results showed that both of the D1 and D2 lines had appeared the chromosome aberrances which including single chromosome, chromosome lagging, chromosome bridge, excessive bally dividing etc.
    D1、D2代的减数分裂过程中均出现了单价体、染色体落后、染色体桥、多极分裂等异常现象。
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  chromosome chromosome
Chinese hamster ovary (CHO) cells were cotransfected with pSV2-neo and genomic DNA from a CHO ×human cell hybrid containing a single human chromosome (chromosome 11).
      
BothOVP1 andOVP2 are mapped on the same chromosome (chromosome 6) to a distance of ca.
      
Only Segment I of the sex chromosome (Chromosome A) shows marked differences.
      
Of 36 monkeys examined, five females showed heterozygotic 'marker' chromosome (chromosome 9).
      
We have isolated and characterized the smallest chromosome (chromosome 1, 980 kb) to elucidate the fundamental molecular organization of a plant-type chromosome.
      
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Oryza alta Swallen is a species of allotetraploid wild rice (CCDD,2n=48) with high biomass production and resistant to several insects and diseases.The high polymorphism (RFLP)between O.alta and O.sativa L.(average 90%)reveals the long phylogenical distance between these two species which may impede the crossing. The chromosome constitutions of several progeny from O.alta × O.sativa were analyzed with 22 mapped rice RFLP markers.The results showed that almost all triploid sterile plants which had 36 chromosomes...

Oryza alta Swallen is a species of allotetraploid wild rice (CCDD,2n=48) with high biomass production and resistant to several insects and diseases.The high polymorphism (RFLP)between O.alta and O.sativa L.(average 90%)reveals the long phylogenical distance between these two species which may impede the crossing. The chromosome constitutions of several progeny from O.alta × O.sativa were analyzed with 22 mapped rice RFLP markers.The results showed that almost all triploid sterile plants which had 36 chromosomes were,as expected,composed of the chromosomes from two parents.But the two partial fertile regenerated plants from 02428(O.sativa)× WHS601 2(O.alta) which had only 24 and 25 chromosomes respectively,in most cases,had RFLP patterns similiar to their O.sativa parent. Therefore the chromosomes constituted their genomes were mainly from O.sativa or have high homology with the chromosomes of O.sativa. It seems evident that chromosome elimination had occurred during the wide hybridization as O.alta RFLP patterns could be found in them.Furthermore, that the introgression of O.alta chromosome fragment into that of O.sativa in an F 2 plant was indicative that some kind of recombination also occurred.Regarding the rare chromosome pairing in PMCs,the probability of the existence of a non conventional mechanism for the wild rice chromosomes (chromosome fragments )to introgressing into cultivated rice genomes in a relatively short time was discussed.

应用限制性片段长度多态性(RFLP)分析了高秆野生稻(Oryza alta Sw allen)与栽培稻(O.sativa L.)之间的多态性差异,以及二者杂交后通过胚挽救获得的后代植株的染色体大致组成情况。结果表明,高杆野生稻基因组与栽培稻基因组差别极大,经胚挽救获得的杂种后代植株大部分为三倍体,不育;两个部分不育的植株中发生了染色体丢失,基因组趋向栽培稻的基因组。结果还表明,在野生稻与栽培稻杂交获得后代的过程中,可能存在一种非传统的遗传重组机制导致野生稻染色体片段向栽培稻基因组的“渗入”

The recombinant inbred line(RIL) populations derived from Zhenshan 97B/Miyang 46(ZS97B/MY46) and their genetic linkage maps were employed to map QTLs controlling tolerance to high Al~(3+) stress by using paper culture of rice seedlings with two concentrations of Al~(3+) stress(20 mg/L and 30 mg/L).After 20 days of treatment,the relative root length (%) and relative seedling height(%) were measured as index for tolerance to high Al~(3+) stress.The results showed that two QTLs with main effects were detected based...

The recombinant inbred line(RIL) populations derived from Zhenshan 97B/Miyang 46(ZS97B/MY46) and their genetic linkage maps were employed to map QTLs controlling tolerance to high Al~(3+) stress by using paper culture of rice seedlings with two concentrations of Al~(3+) stress(20 mg/L and 30 mg/L).After 20 days of treatment,the relative root length (%) and relative seedling height(%) were measured as index for tolerance to high Al~(3+) stress.The results showed that two QTLs with main effects were detected based on relative root length,i.e.qRAC(r)2 and qRAC(r)11.The former detected in both treatments explained 12.92% and 16.15% of the total phenotypic variation.The positive additive effects came from the female parent,Zhengshan 97B,showing high potential tolerance to high Al~(3+) stress.Two main effect QTLs were also detected on chromosome 11 by relative seedling height,i.e.qRAC(s)11-2(20 mg/L Al~(3+)) and qRAC(s)11-1(30 mg/L Al~(3+)).Epistasis analysis showed that the variation explained by epistasis QTLs was higher than that explained by the main effect QTLs,indicating that the QTLs displayed their effects through different ways of interaction.Based on relative root length,a total of eight pairs of epistasis including 15 QTLs were detected on six chromosomes(chromosome 1,2,3,5,6 and 10).Based on relative seedling height,a total of six pairs of epistasis were detected on 9 chromosomes(chromosome 1,2,3,5,6,7,8,9 and 12).All the epistasis QTLs were not located at same loci where the main effect QTLs resided.

用珍汕97B/密阳46构建RIL群体及其遗传图谱,对其种子采用纸培法育苗和培养,并设2个Al3+浓度(20 mg/L和30 mg/L)胁迫处理,以处理20 d后的幼苗相对根长(%)和相对苗高(%)为耐Al3+胁迫指标,用于QTL定位分析。结果表明,以相对根长为指标,检测到2个耐Al3+胁迫的主效应QTL,即qRAC(r)2和qRAC(r)11,其中qRAC(r)2在2个胁迫处理下均被检测到,有效基因来自于珍汕97B,贡献率较大(12.92%和16.15%),表现出较强的耐Al3+胁迫功能。以相对苗高为指标,还检测到qRAC(s)11-2(20 mg/L Al3+)和qRAC(s)11-1(30 mg/L Al3+)2个主效应QTL,它们均位于第11染色体。耐Al3+胁迫的QTL上位性分析还表明,总的QTL上位性互作效应比主效应QTL的作用更大,且显示出相当的复杂性,在不同胁迫浓度下,基因间可以通过不同的互作方式,表现出对高Al3+胁迫的耐性。以相对根长为指标,检测到8对上位性互作,涉及1、23、、5、6、10等6条染色体的15个QTL位点;以相对苗高为指标,共检测到6对上位性互作,涉及第1、2、3、5、6、7...

用珍汕97B/密阳46构建RIL群体及其遗传图谱,对其种子采用纸培法育苗和培养,并设2个Al3+浓度(20 mg/L和30 mg/L)胁迫处理,以处理20 d后的幼苗相对根长(%)和相对苗高(%)为耐Al3+胁迫指标,用于QTL定位分析。结果表明,以相对根长为指标,检测到2个耐Al3+胁迫的主效应QTL,即qRAC(r)2和qRAC(r)11,其中qRAC(r)2在2个胁迫处理下均被检测到,有效基因来自于珍汕97B,贡献率较大(12.92%和16.15%),表现出较强的耐Al3+胁迫功能。以相对苗高为指标,还检测到qRAC(s)11-2(20 mg/L Al3+)和qRAC(s)11-1(30 mg/L Al3+)2个主效应QTL,它们均位于第11染色体。耐Al3+胁迫的QTL上位性分析还表明,总的QTL上位性互作效应比主效应QTL的作用更大,且显示出相当的复杂性,在不同胁迫浓度下,基因间可以通过不同的互作方式,表现出对高Al3+胁迫的耐性。以相对根长为指标,检测到8对上位性互作,涉及1、23、、5、6、10等6条染色体的15个QTL位点;以相对苗高为指标,共检测到6对上位性互作,涉及第1、2、3、5、6、7、89、、12等9条染色体;且几乎所有互作均发生在背景因子的QTL位点间。

The recombinant inbred line (RIL) populations derived from Zhenshan 97B/Miyang 46 (ZS97B/MY 46) and their genetic linkage maps were employed to map QTLs controlling tolerance to high Fe 2+ stress by treat- ing the seedling with different concentration of Fe 2+ (160 mg/L and 240 mg/L). After 20 days of treatment, the relative seedling height (%) were measured as index for tolerance to high Fe 2+ stress. The results showed that four QTLs with main effects (i.e. qTFS-1-1、qTFS-3、qTFS-6 and qTFS-9) were detected...

The recombinant inbred line (RIL) populations derived from Zhenshan 97B/Miyang 46 (ZS97B/MY 46) and their genetic linkage maps were employed to map QTLs controlling tolerance to high Fe 2+ stress by treat- ing the seedling with different concentration of Fe 2+ (160 mg/L and 240 mg/L). After 20 days of treatment, the relative seedling height (%) were measured as index for tolerance to high Fe 2+ stress. The results showed that four QTLs with main effects (i.e. qTFS-1-1、qTFS-3、qTFS-6 and qTFS-9) were detected on chromosome 1, 3, 6 and 9, which in total contributed to 14.96% of the whole phenotypic variation. None of them had signifi cant G× E interaction effect. In addition, epistasis analysis showed that a total of three pairs of epistasis QTLs were signifi - cant for tolerant to Fe 2+ stress, that could explain 7.16% of the total phenotypic variation. These epistasis were de- tected on fi ve chromosomes (chromosome 1, 2, 7, 9 and 12). Most of the epistasis QTLs were not located at same loci where the main effect QTLs resided. All of the three pairs epistasis QTLs had no any signifi cant epistasis × envirment interaction effect also.

用珍汕97B/密阳46的RIL作图群体,以基本营养液培养为对照(CK),设2种Fe2+(160mg/L和240mg/L)作为胁迫处理,以处理20d的幼苗相对苗高(%)(处理苗高/对照苗高×100%)作为幼苗耐Fe2+胁迫程度的评价指标,进行2个环境的QTL联合检测分析。结果表明,RIL群体株系间对Fe2+胁迫反应差异较大,明显出现超亲分离。共检测到4个耐Fe2+胁迫的主效QTL,即qTFS-1-1、qTFS-3、qTFS-6和qTFS-9,分别位于第1、3、6和9染色体上,可解释14.96%的表型变异,它们与Fe2+胁迫浓度并无显著的G×E互作,表明这4个耐性基因在不同浓度Fe2+胁迫处理下,均可稳定表达。试验还检测到3对耐Fe2+胁迫的加性×加性上位性互作,共可解释7.16%的表型变异,涉及第1、2、7、9、12等5条染色体,该3对上位性互作与Fe2+不同浓度胁迫处理也无显著G×E互作。

 
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