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四倍体小麦
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  tetraploid wheat
     SDS-PAGE revealed that the HMW-GS loci of SY95-71 encoded by the Glu-B1, named subunit 23+18, was derived from Eronga 83. This locus existed only in the tetraploid wheat was firstly incorporated to common wheat by the present study.
     SDS-PAGE分析表明 ,小麦品系 SY95-71具有来源于 Eronga83的 Glu-B1位点控制的高分子量谷蛋白亚基 2 3+1 8,该亚基仅存在于四倍体小麦中 ,将该亚基转入小麦是本研究的首次报道 ;
短句来源
     Analysis of Glu-3 Locus in Tetraploid Wheat "Langdon" by BAC Sequencing
     四倍体小麦“Langdon”低分子量谷蛋白Glu-3位点的BAC序列分析
短句来源
     C-band analysis on the dwarf landrace of tetraploid wheat
     四倍体小麦矮杆地方品种的C带分析
短句来源
     Genetic Diversity Study about Storage Proteins and SSR Marker of Tetraploid Wheat
     四倍体小麦种子贮藏蛋白和SSR标记遗传多样性研究
短句来源
     PS5, the tetraploid wheat parent of Am4. Microsatellite marker Xgwm356 was identified to be linked to the gene with a genetic distance of 10.2cM.
     该基因来源于Am9的四倍体小麦亲本波斯小麦PS5。 微卫星标记Xwmc317、Xgwm111、Xgwm382和Xgwm526与其连锁。
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  “四倍体小麦”译为未确定词的双语例句
     2 to 14 alleles were detected at each locus, with an average of 6.1. The most of locus detected is 14, from the primer GWM162. While the primer GWM24 could only detected 2 loci.
     3.对48份四倍体小麦材料的SSR检测发现,16对引物共检测到97个等位点,每个引物可以检测等位点从2个到14个不等,平均每个引物可检测到6.1个等位点:最多的是GWM162,有14个位点:最少的是GWM24,有2个位点。
短句来源
     Yr24.. Yr26~. YrA and someunknown genes were postulated to be probably present in tetraploid wheats selected,either alone or in combination.
     基因推导结果表明,筛选出的抗病四倍体小麦可能分别携带Yr5、Yr6、Yr7、Yr10、Yr15、Yr24、Yr26、YrA等已知抗条锈病基因和未知基因。
短句来源
     1. Thirty-one BAC clones carrying Glu-3 were identified by SSR marker, gene specific PCR marker and Southern blot from the BAC library of Langdon (T. durum). After BAC clones were digested by Hind HI, FPC analysis showed that 8 BAC clones of Glu-A3 belong to one group, 4 BAC clones of Glu-B3 belong to another group, The others are singletons.
     1.利用Southern杂交、SSR及Glu-A3和Glu-B3位点特异PCR标记方法筛选四倍体小麦“Langdon”BAC文库,获得了携带Glu-3基因的BAC克隆31个,通过Hind Ⅲ酶切图谱分析,初步构建了包含Glu-B3位点和Glu-A3位点的跨叠群,分别包含4个BAC克隆和8个BAC克隆。
短句来源
     The distribution of hybrid chlorosis Ch1 gene and the T-type cytoplasm fertility restoring genes in Chinese endemic wheats were studied using the testors QA1104 (T-type cytoplasm sterile line, with hybrid chlorosis Ch2 gene) and Khapli emmer (with hybrid chlorosis Ch1 gene).
     本研究以T型不育系QA1104(具有杂种黄化基因Ch2)和Khapli(具有杂种黄化基因Ch1)为测验种,对中国特有小麦等六倍体小麦类型和一些四倍体小麦类型中的T型胞质育性恢复基因和杂种黄化Ch1基因的分布进行了研究。
短句来源
     PS5, T. durum ace. DR147, 4 Aegilops accessions and advanced lines Am9/Laizhou953*2 F5 and (DR147/Ael4) //Laizhou953*2 F4 were analyzed by inoculating detached primary leaf segments with a set of 20 differential powdery mildew isolates.
     用离体叶段接种方法鉴定了11个四倍体小麦-山羊草双二倍体、波斯小麦PS5、硬粒小麦DR147、5份山羊草、杂交高代材料Am9/莱州953~*~2 F_5和(DR147/Ae14)//莱州953~*~2 F_4对20个具有不同毒力白粉菌株的抗谱。
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  相似匹配句对
     Esterase Isozymes of Tetraploid Wheat Landraces from Sichuan
     四川四倍体小麦地方品种酯酶同工酶
短句来源
     THE ORIGIN OF CHROMOSOME 4A AND GENOMES B AND G OF TETRAPLOID WHEATS
     四倍体小麦染色体4A和B、G染色体组的起源
短句来源
     , wheat ( Triticum aestivum L. )
     、小麦(Triticumaestivum L.)
短句来源
     Sister Chromatid Exchanges In Wheat
     小麦的姐妹染色单体交换
短句来源
     Tetraploid I.
     与四倍体I .
短句来源
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  tetraploid wheat
Inheritance of Awnlessness in Tetraploid Wheat Species
      
Awn absence was shown to be inherited as a dominant character in the tetraploid wheat species Triticum dicoccum (Schrank) Schuebl.
      
For each line, two F1 populations were obtained, normal pentaploids (2 n = 35) and monopentaploid (2 n = 34), in which, in turn, the monosomic A or B chromosome present was supplied by the tetraploid wheat.
      
All 14 wheat chromosome pairs were individually identified in the triticales and a tetraploid wheat, and all the B and two A genome chromosome pairs in the hexaploid wheat genotypes.
      
Amphiplasty in hexaploid triticale, the artificial amphiploid of tetraploid wheat and diploid rye, is analyzed for the first time using a modified, highly reproducible, silver-staining procedure.
      
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T. aestivum was directly crossed with H.villosa, and the hybrids were backcrossed with T. aestivum. Their F_1,BC_1 and BC_2 were successfully obtained.Generally, the cross ability of T. aestivum with H, villosa is significantly lower than that of tetraploid wheat, However, the seed set of Nannong Big Black Awned,a common wheat variety developed from an interspecitic hybridization between T.aestivum and T. turgidum, reached a fertility as high as 3.5% when it crossed with H. villosa.The somatic chromosome number...

T. aestivum was directly crossed with H.villosa, and the hybrids were backcrossed with T. aestivum. Their F_1,BC_1 and BC_2 were successfully obtained.Generally, the cross ability of T. aestivum with H, villosa is significantly lower than that of tetraploid wheat, However, the seed set of Nannong Big Black Awned,a common wheat variety developed from an interspecitic hybridization between T.aestivum and T. turgidum, reached a fertility as high as 3.5% when it crossed with H. villosa.The somatic chromosome number of F_1 plants corresponded literally to the theoretically expected value, viz. 2NF_1=N(?)+N(?).Most of the chromosomes from their parents were univalents at MI of meiosis of PMC, bat rod-bivalents and even ring-bivalents also appeared in F_1 hybrids with genomic constitution of DV. The numbers of bivalents, trivalents and quadrivalents per PMC at MI of meiosis in F_1 hybrids ABV, AGV and ABDV were much higher than those in the induced haploids AB, AG and ABD respectively. It suggested that homoeologous pairing might exist between the chromosomes of V genome and A, B, D and G genomes besides similar pairing between the chromosomes of genomes A, B, D and G.Some partial fertility was found in BC_1 plants when T. aestivum had been used as a female parent of the first crosses. Some plants with the somatic chromosome number approximate or equal to 49 occured in BC_1, and about 20 bivalents and 5—7 univalents per PMC at meiotic MI could be observed. The alien addition lines with individual Haynaldia chromosome were frequently obtained from selfpollinating or backcrossing offsprings of these plants. The somatic chromosome number of BC_2 approached rapidly to 42 and the fertility and agronomic characters of BC_2 were restored nearly to the level of T. aestivum. Besides the plants with individual additional Haynaldia chromosome,plants involving substitution or translocation between chromosomes of T. aestivum and H. villosa were also found in BC_2. Thus, in order to transfer germplasm from H.villosa into T.aestivum, the T.aestivum could be considered as a more suitable original female parent as compared with the tetraploid wheat.The esterase isozyme patterns of F_2 and BC_1 plants showed a similar tendency, as corresponding cytological and genetical analysis did.

本研究直接用普通小麦作母本与簇毛麦杂交并用普通小麦回交,成功地获得了它们的F_1、BC_1和BC_2。F_1植株的体细胞染色体数与理论值相符:2N_(F1)=N♀+N♂。来自双亲的染色体在PMC的MI以单价体构型为主,但在DV中还可看到棒状甚至环状二价体,在ABV、AGV和ABDV中的二价体、三价体和四价体数均高于其母本物种的单倍体AB、AG和ABD中的相应数值,从而推测可能存在V组与A、B、D组染色体间的同源转化配对。虽然普通小麦比四倍体小麦更难与簇毛麦杂交,但以普通小麦作原初杂交母本的BC_1,中已出现部分可育植株,并出现了一些2n等于或接近49的植株,它们的PMC在MI有20个左右二价体和5—7个单价体。在BC_2中,2n数迅速趋近42,其育性及农艺性状迅速恢复,并已较快地分离出在整套普通小麦染色体上添加了个别簇毛麦染色体或与簇毛麦个别染色体发生了置换或易位的植株。因此,为将簇毛麦种质较快地导入普通小麦,用普通小麦作原初杂交母本比用四倍体小麦更为有利。

The present paper is a report on the systematic investigations on the morphology fertility and cytology in six combinations of interspecific F1 hybrids between common wheat and tetraploid wheat. Ten typical F2 plants(T. aestivum L. ×. T. durum L.) were also investigated. Among other things many chromosome aberrations occurred in the meiosis of pentaploid hybrids, however there were no distinct differences among different combinations and between reciprocal crosses.The investigations of ten F, hybrids showed...

The present paper is a report on the systematic investigations on the morphology fertility and cytology in six combinations of interspecific F1 hybrids between common wheat and tetraploid wheat. Ten typical F2 plants(T. aestivum L. ×. T. durum L.) were also investigated. Among other things many chromosome aberrations occurred in the meiosis of pentaploid hybrids, however there were no distinct differences among different combinations and between reciprocal crosses.The investigations of ten F, hybrids showed that there was a direct relationship between chromosome behavior and fertility, i. e. when the chromosome behavior was more or less normal, the fertility would be correspondingly higher, and conversely, the fertility would be lower when the chromosome behavior was irregular. In addition, some morphological characters could be looked upon as an important basis for the identification of the ploidy of plants, but it would be difficult to identify when the fertility was poor. It seems that cytological studies of typical plants of early generations of distant crosses would be of value in breeding work.

本工作对普通小麦与若干四倍体小麦杂交六个组合的杂种一代及(普通小麦×硬粒小麦)杂种二代的十个典型单株进行了植株形态、育性和细胞学的综合观察。看到五倍体杂种一代减数分裂过程中的各种异常现象,但未见不同组合之间及正反交组合之间有明显差别。对(农大168×D_82))杂种二代典型单株的观察表明,染色体行为和结实率间有直接关系:染色体行为正常,结实率高,染色体行为失常则结实率低。同时看到某些植株形态特征可以作为判断单株染色体倍数的重要根据。但对一些育性偏低的材料,则难以判断其染色体倍数趋势。远缘杂交中对早代重点单株进行细胞学观察对提高后代选育的准确性有一定意义。

The somatic chromosomes of tetraploid wheats(AABB and AAGG)and probable donors of B and G genomes Ae.speltoides,Ae.longissima,Ae.sharonensis,Ae.bicornis and Ae.searsii were identified by an N-ban-ding technique.All chromosomes of A genome but 4A were banded withweak bands or no band.There was general similarity of N-banding pat-terns between B and G genome chromosomes but the G genome chromoso-mes were more heterochromatic.The N-banding patterns of Ae.speltoi-des,with the exception of chromosomes 4B and 4G,were...

The somatic chromosomes of tetraploid wheats(AABB and AAGG)and probable donors of B and G genomes Ae.speltoides,Ae.longissima,Ae.sharonensis,Ae.bicornis and Ae.searsii were identified by an N-ban-ding technique.All chromosomes of A genome but 4A were banded withweak bands or no band.There was general similarity of N-banding pat-terns between B and G genome chromosomes but the G genome chromoso-mes were more heterochromatic.The N-banding patterns of Ae.speltoi-des,with the exception of chromosomes 4B and 4G,were more similar tothe B and G genome chromosomes thall other species of the Sitopsis groupof Aegilops.One chromosome similar to 4A of tetraploid wheats was ob-served in Ae.speltoides only.The results of analysis of the pairing of telosomic chromosomes of T.durum cv.Langdon with the chromosomes of T.timopheevi,T.araraticumand Ae.speltoides showed that the chromosome 4A originted from Aespeltoides,should be designated as 4B(or as 4G in AAGG),and Ae.speltoids might be one of the donors of B and G genomes.

用染色体 N—分带技术对四倍体小麦(AABB 和 AAGG)以及 B 和 G 染色体组的可能供体拟斯卑尔脱山羊草(Ae.speltoides)、高大山羊草(Ae.longissima)、沙融山羊草(Ae.sharonensis)、二角山羊草(Ae.bicornis)和西尔斯山羊草 Ae.se-arsii 的体细胞染色体进行核型分析。除染色体4 A 以外的所有 A 组染色体只有较浅的 N—带或无带。B 组和 G 组染色体(4 B 和 G 4除外)的 N—带较深,但G 组染色体的异染色质化程度更高。拟斯卑尔脱山羊草的 N—带型比山羊草Sitopsis 组的其它种更接近于 B 组和 G 组染色体的 N—带型(4 B 和 G 4除外)。其中有一对染色体的 N—带型与四倍体小麦的4A 很相似。用硬粒小麦“Langdon”的双端体二体(double ditelosomics)材料与提莫菲维小麦(T.timopheevi)、阿拉拉特小麦(T.araraticum)和拟斯卑尔脱山羊草杂交,对 F_1植株花粉母细胞减数分裂中期Ⅰ的染色体进行 N—分带和对端体染色体的配对行为的观察结果表明,染色体4A 应...

用染色体 N—分带技术对四倍体小麦(AABB 和 AAGG)以及 B 和 G 染色体组的可能供体拟斯卑尔脱山羊草(Ae.speltoides)、高大山羊草(Ae.longissima)、沙融山羊草(Ae.sharonensis)、二角山羊草(Ae.bicornis)和西尔斯山羊草 Ae.se-arsii 的体细胞染色体进行核型分析。除染色体4 A 以外的所有 A 组染色体只有较浅的 N—带或无带。B 组和 G 组染色体(4 B 和 G 4除外)的 N—带较深,但G 组染色体的异染色质化程度更高。拟斯卑尔脱山羊草的 N—带型比山羊草Sitopsis 组的其它种更接近于 B 组和 G 组染色体的 N—带型(4 B 和 G 4除外)。其中有一对染色体的 N—带型与四倍体小麦的4A 很相似。用硬粒小麦“Langdon”的双端体二体(double ditelosomics)材料与提莫菲维小麦(T.timopheevi)、阿拉拉特小麦(T.araraticum)和拟斯卑尔脱山羊草杂交,对 F_1植株花粉母细胞减数分裂中期Ⅰ的染色体进行 N—分带和对端体染色体的配对行为的观察结果表明,染色体4A 应重标为4B(在 AAGG 中应重标为G4),该染色体起源于拟斯卑尔脱山羊草。拟斯卑尔脱山羊草是 B 和 G 染色体组的供体之一。

 
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