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The karyotypes and the Giemsa-C banding patterns of Aegilops tauschii (85A-34) and Hordium vulgare (H2) and regenerated plants from embryo callus of hybrids between Ae.tauschii and H.vulgare (2n=28) were confirmed by karyotype analyzing and Giemsa-C banding technique in this study, thus proved that the regenerated plants from embryo callus of hybrids between Ae.tauschii and H.vulgare (2n=28) were spontaneously chromosal doubling amphidiploid.

本研究通过染色体组型分析和Giemsa--C带显带技术,确定了节节麦(85A85A-34)、栽培大麦(H2)、节节麦×大麦杂种胚再生植株(2n=28)的染色体组型和Giemsa--C带核型,证明了节节麦×大麦杂种胚再生植株(2n=28)为自发加倍的节节麦-大麦双二倍体。

The self-fertile trigeneric hybrids between Triticum aestivum L.(2n=6x=42;AABBDD) and Agropyron michnoi Roshev.(2n=4x=28;PPPP) F1 hybrid (CM,2n=5x=35,ABDPP)with two rye (Secale cereale L.,2n=2x=14;RR)cultivars, Wugong 774 and AR132 were produced.

普通小麦(Triticum aetivum L。,2n=6x=42;AABBDD)和根茎冰草(Agrop yronmichnoi Reshev。,2n=4x=28;PPPP)间的F1杂种(2n=5x=35;ABDPP)与两个黑麦(Secale cereale L。, 2n=2x=14;RR)品种杂交,产生了自交可育的三属杂种。

Heterosis for fructan accumulation and content,tissue nitrogen accumulation and content in various growth stages of six hybrids was studied at the University of Sydeny, Plant Breeding Institute, Narrabri in 1996 season.

果糖积累的杂种优势与籽粒产量、籽粒氮产量和含量优势一般无显著相关关系;开花期和灌浆末期植株果糖含量的杂种优势正相关于籽粒产量优势,负相关于籽粒氮含量优势。

The many hybrid wheat combinations were bred by 4 male sterile types of alloplasmic wheat with Ae.kotschyi,Ae.variabilis,Ae.ventricosa and Ae.bicornis cytoplasms and some restoring lines,and their seed qualities were analysed.

利用具有粘果山羊草(Ae.kotschyi)、易变山羊草(Ae.variabilis)、偏凸山羊草(Ae.ventricosa)和二角山羊草(Ae.bicornis)异源细胞质小麦雄性不育系(以下简称粘、易、偏和二角型)组配成不同组合的杂种小麦,研究这4种不育系对杂种小麦籽粒品质的影响。

This work dealt with formation mechanism of heterosis of cocoon quality characters bymeans of physiological,biochemical and biometrical techniques for the purpose to providetheory guidance for adequate and predicatable application of heterosis.

本研究用生理生化及生物数学的分析方法,探索家蚕茧质性状杂种优势的产生机理,以期为生产上合理地、有预见地利用杂种优势提供理论指导。

The main results are as followings:1 Molecular mechanism analysis of the rice heterosis by functional genomics method.1.1 In five gene chips, 845 genes that are discrepantly expressed were found.

研究结果如下: 1 运用基因芯片对水稻杂种优势分子机理的解析: 1.1 5张基因芯片检测出845个差异表达基因,涉及多种植物功能,表明杂种优势的表现与多种代谢途径相关。

At the same time according to the result of heterotic groups by SSR marker, the quality of five main heterotic groups were analyzed and appraised.

同时根据本实验室SSR分子标记划分杂种优势群的结果,对我国五大主要杂种优势群的品质进行分析利评价。

Cytological studies on the mode of gamete formation in F1 hybrid between E.intermedium and Yannong 15 were carried out.The r esults indicated that the first meio-?

以中间偃麦草与小麦烟农15的杂种F1及其5个自交和回交世代(F2、F3、BC1、BC2、BC3)为材料,对杂种F 1配子形成途径的细胞学特点进行了研究。

Accessions hybrid BC1 F2 were backcrossed, with two elite parents Diantun502 and Flcxi35 widely cultivated in Yunnan as recurrent parent, while 548 accessions core collection in Yunnan rice landrace as donors. Under natural low temperature 18.1℃ at booting stage, the genetic variation to main morphological characters of core collection hybrids in Yunnan rice landrace was analyzed between indica and japonica, rice cropping regions.

在昆明孕穗期平均温度181℃的自然低温下,以云南当家品种滇屯502和合系35作轮回亲本,以548份云南稻核心种质为供体亲本配制的杂种BC1F2(458份)为材料,按籼粳、稻作区进行云南稻核心种质杂种后代形态性状遗传变异研究。

Formula for prediction of general heterosis and interaction heterosis of single-cross offspring based on QTL effects were deduced.

推导了基于QTL效应的单交后代普通杂种优势和互作杂种优势预测公式。

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