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缺体小麦
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  nullisomic wheat
     Crosses were made between nullisomic wheat and Triticum aestivum-Psathy-rostachys huashanica heptaploid (2n = 49, AABBDDN ), and the F1 plants were back-crossed twice to their respective nullisomic wheat. The plants with 2n = 41 of BC2 F1were selected by microscope and selfed.
     利用缺体小麦与小麦-华山新麦草七倍体杂种(2n=49,AABBDDN)杂交,F1再与相应’的缺体小麦回交2次,在BC2F1境检选出2n=41的植株,同时套袋自交,选育出5A和3D两种异代换系。
短句来源
     Cytogenetic Studies on the Cross between OctoploidTritileymus and Nullisomic Wheat
     八倍体小滨麦与缺体小麦杂交的细胞遗传学研究
短句来源
     Developing Stable Nullisomic Wheat by Blue Grain Monosomic Wheat
     利用蓝粒单体小麦选育稳定缺体小麦的研究
短句来源
     BREEDING AND UTILIZATION OF WINTER-HATURED SELF-FRUIT NULLISOMIC WHEAT WITH DIFFERENT HEREDITY BACKGROUNDS
     冬性自交结实缺体小麦选育及利用研究
短句来源
     THE STUDY OF CHROMOSOME VARIATIONS IN REGENERATED PLANTS CULTURED FROM NULLISOMIC WHEAT× RYE
     缺体小麦与黑麦杂种幼胚愈伤组织再生植株的染色体变异
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  “缺体小麦”译为未确定词的双语例句
     A Cytogenetic Study on Hybrids from Crossing 4D-Nullisomics with 8X-Agrotriticum
     4D缺体小麦与八倍体小偃麦杂交的细胞遗传学研究
短句来源
     We got lots of 4D-nullisomic plants of wheat from the progeny of blue monosomic, and some self-fertilized 4D-nullisomic lines were isolated by selection.
     通过繁殖蓝单体获得大量缺体植株,并经连续自交与选择育成了自花结实的4D-缺体小麦
短句来源
     The segregation range of BC1F1 from octoploid Tritileymus crossed with nullisomic was narrower as compared with F2 and more 41 chromosome types could be observed.
     八倍体小滨麦与缺体小麦杂交和回交,其后代BC1F1与F2相比较,染色体分离范围小,有利于41条染色体类型的分离,若用异源双单体附加作父本与缺体回交,41条染色体类型的分离率还会提高2倍左右;
短句来源
     VARIATION OF CHROMOSOME NUMBER IN CALLUS CELLS FROM IMMATURE EMBRYOS OF THE COMBINATIONS BETWEEN WHEAT OR ITS NULLISOMIC AND RYE
     小麦及缺体小麦与黑麦杂种幼胚愈伤组织在长期继代中的染色体数量变异
短句来源
     THE INVESTIGATION OF INCREASING WHEAT NULLISOMIC FERTILITY USED THE ENHANCING FERTILITY GENES ON MICROCHROMOSOMES
     利用小染色体的促进结实基因提高缺体小麦结实性研究
短句来源
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  相似匹配句对
     NULLISOMIC ANALYSIS OF WHEAT CHARACTERISTICS
     小麦性状的缺体分析
短句来源
     SSR-ASSISTED IDENTIFICATION OF NULLI-TETRASOMES IN WHEAT
     小麦缺体-四体的SSR辅助鉴定
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
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A disomic substitution line of 4B for 4D is named Blue-grained wheat. It had its origin from the cross and backcrosscs between Triticum L. and Agropyron elongatinn (Host) Beauv (2n = 70) many years ago, and was made recently to cross again with common wheat, then a blue-grained monosomic whcat (for short, blue monosomic) was developed (Fig. 2; Plate I). This line has 40 wheat chromosomes and 1 Agropyron ehromosome-4E carrying a blue aleurone layer gene, the latter replaced 2(4D) (Piatc II, 1). The selfed grains...

A disomic substitution line of 4B for 4D is named Blue-grained wheat. It had its origin from the cross and backcrosscs between Triticum L. and Agropyron elongatinn (Host) Beauv (2n = 70) many years ago, and was made recently to cross again with common wheat, then a blue-grained monosomic whcat (for short, blue monosomic) was developed (Fig. 2; Plate I). This line has 40 wheat chromosomes and 1 Agropyron ehromosome-4E carrying a blue aleurone layer gene, the latter replaced 2(4D) (Piatc II, 1). The selfed grains of blue monosomic could be grouped into four types: deep blue, medium blue, light blue and white, of which the chromosome numbers in root-tip cells are 42, 41, 41 and 40 respectively (Plate II, 3, 4, 5).We got lots of 4D-nullisomic plants of wheat from the progeny of blue monosomic, and some self-fertilized 4D-nullisomic lines were isolated by selection. Recently they have been used in the hybridization with S uile cereale L., and the F1 plants with 27 chromosomes (Plate II, 2) have been obtained.

本文分析了中国春单体小麦繁殖中存在的困难,指出了建立具有标记基因的新的蓝粒单体小麦系统的必要性。介绍了利用蓝粒小麦与普通小麦杂交选育4D-蓝单体小麦的过程及其繁殖原理与技术;通过繁殖蓝单体获得大量缺体植株,并经连续自交与选择育成了自花结实的4D-缺体小麦。最近,又用4D-缺体小麦与黑麦杂交得到具有27个染色体的F_1杂种。

Hybridizing fertile 4D nullisomics derived from blue-grained monosomics of common wheat (Triticum aestivum 2n= 42) varieties 72180 and Tian Xuan 15 with 8X Agrotriticum (2n=56) 784,7631,78829,then backcrossing the Ft or F?plants for 1-2 generations with the fertile 4D nullisomic lines,no matter whether the 4D nullisomics as male or female in the backcrossing process,aliea substitution lines were produced.It was found that 1) in the backcrossing process,nulJisomics as female was more efficient than as male for...

Hybridizing fertile 4D nullisomics derived from blue-grained monosomics of common wheat (Triticum aestivum 2n= 42) varieties 72180 and Tian Xuan 15 with 8X Agrotriticum (2n=56) 784,7631,78829,then backcrossing the Ft or F?plants for 1-2 generations with the fertile 4D nullisomic lines,no matter whether the 4D nullisomics as male or female in the backcrossing process,aliea substitution lines were produced.It was found that 1) in the backcrossing process,nulJisomics as female was more efficient than as male for developing alien substitution lines; 2) selecting vigorous plants with 41-44 chromosomes in the F1 population and backcrossing them with 4D fertile nullisomics as female was more efficient than beginning backcrossing at F1 with nullisomics as male for production of alien substitution lines.At the same time,agricultural and biolgical characteristics of new 4Ag (4D) substitution lines were studied.The 4Ee (4D) blue-grained,4Fe (4D) hair leaf new substitution lines of T.aestivum-Ag.elongatum (2n=70) and 4Ei (4D) substitution lines of T.aestivum-Ag.intermedium (2n=42) were vigorous in vegetative growth and fertile in seed seting.

利用从蓝单体自交分离得到的自花结实的4D缺体小麦(缺72180、缺天选15)作母本与3个不同的八倍体小偃麦(小偃784、小偃7631和小偃78829)杂交,再以缺体作为轮回亲本,从F_1或F_2开始连续回交1—2次,在回交中,缺体无论作父本或母本都得到了异代换系,并且发现:(1)在回交过程中,用缺体作母本比作父本更为有效;(2)F_1自交,在F_2群体中选择生长比较正常,染色体数比较少的植株回交,比F_1作母本直接回交效果更好。并对所得的异代换系的特征特性进行了初步的观察研究,发现中间偃麦草(Agropyron intermedium2n=42) 4E染色体(以下用4Ei表示)、长穗偃麦草(Agropyron clongatum 2n=70)的4E染色体(带蓝粒基因,以下用4Ee表示)和4F染色体(带毛叶基因,以下用4Fe表示)均能正常补偿小麦4D染色体。异代换系生长旺盛,育性正常。初步总结了缺体与八倍体小偃麦杂交,回交过程中异代换系的形成规律,证明了“缺体回交法”可以推广应用于八倍体小偃麦等人工合成的新物种,以选育普通小麦异代换系。

Five fertile 4D nullisomics derived from blue-grained monosomics of common wheat (T. aestivum) were crossed with 11 strains of Aegilops. Alien substitution lines were produced in nulli-Tianxuan 15×Ae. speltoides (disomic substitution lines) and nulli-72180×Ae. sharonensis(monosomic substitution lines) by backcrossing the F_1 plants with the fertile 4D nullisomic lines as recurrent parent under the help of immature embryo culture. Alien substitution lines were vigour and fertile.It was proved that 4S chromosome...

Five fertile 4D nullisomics derived from blue-grained monosomics of common wheat (T. aestivum) were crossed with 11 strains of Aegilops. Alien substitution lines were produced in nulli-Tianxuan 15×Ae. speltoides (disomic substitution lines) and nulli-72180×Ae. sharonensis(monosomic substitution lines) by backcrossing the F_1 plants with the fertile 4D nullisomic lines as recurrent parent under the help of immature embryo culture. Alien substitution lines were vigour and fertile.It was proved that 4S chromosome of Ae- gilops was able to compensate for the function of 4D chromosome of common wheat."Nullisomic backcrossing method" can be used in the Aegilops for developing alien substitution lines.

利用从兰单体自交分离得到的5个自花结实的4D缺体小麦(映72180、块天选15等)作母本与11个山羊草(Ae.speltoides, Ae.sharonensis等)杂交,再以4D缺体为轮回亲本对杂种进行回交,借助于幼胚培养技术,获得了缺天选15×拟斯卑尔脱山羊草二体异代换系,缺72180×沙融山羊草单体异代换系。代换系生长发育良好,育性基本正常,表明山羊草的4S染色体能够补偿小麦缺失的4D染色体的功能。证明利用“缺体回交法”选育普通小麦—山羊草异代换系是有效的和可行的。

 
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