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采用荧光原位杂交(Fluorescence in Situ Hybridization,FISH)技术分析小伞山羊草染色体的核型特点。结果表明,小伞山羊草共包含7对染色体,其中1 U和5 U染色体各含有1对随体。分别以Oligo-pSc 119.2-1(绿色)与(GAA)7(红色)重复序列为探针对小伞山羊草根尖细胞染色体进行FISH分析,发现Oligo-pSc-119.2-1信号主要分布在染色体的端部及近端部,不同染色体之间的信号强度有所差别。(GAA)7信号主要集中于染色体着丝点附近,不但比Oligo-pSc-119.2-1信号的亮度高,分布丰富,而且在染色体上的分布可与Oligo-pSc-119.2-1信号互补。因此,同时采用Oligo-pSc-119.2-1与(GAA)72种探针能准确地辨别小伞山羊草的每对染色体,建立了小伞山羊草的FISH核型。 相似文献
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小麦与山羊草双二倍体抗病性的研究与利用 总被引：6，自引：1，他引：6
本文报道了波斯小麦与粗山羊草(5个品系),小伞山羊草和卵穗山羊草双二倍体及其亲本的抗叶锈和白粉病鉴定结果。粗山羊草对叶锈的抗性受波斯小麦品系 PS 5(不抗叶锈)的抑制,在双二倍体中不能表现。小伞山羊草和卵穗山羊草对叶锈的抗性不受波斯小麦的影响,能在双二倍体中充分表达。以对白粉病免疫的波斯小麦为母本与免疫的山羊 相似文献
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小伞山羊草 6U染色体与小麦 6A染色体易位系“2 114”(T6AL 6AS 6U)对T型雄性不育具有较高的恢复力 ,其恢复基因已被定名为Rf6。Rf6基因通过雌配子的传递率正常 ,而通过雄配子的传递率仅为 30 8% ,个中原因是外源的 6U染色体片段过长。柱穗山羊草杀配子染色体在小麦核背景中能够引起染色体断裂 ,产生缺失、易位等结构变异。鉴此 ,将 2 114与“中国春”小麦柱穗山羊草杀配子染色体二体添加系回交 ,从后代中选择到了可育株比例较高的株系。将这些株系与T型不育系测交 ,调查TCF2 群体育性分离表现 ,结果表明这些株系育性遗传表现不同于 2 114。“140 45”、“14136”两个F3 株系各含有 1对Rf6基因 ,其雄配子传递率正常 ,并且保持了 2 114原有的恢复力 ;而“140 2 0”、“140 44”和“140 88”3个F3 株系各含有两对Rf6基因 ,其中 140 2 0和 140 88两个F3 株系的第二对Rf6基因恢复力较低。产生变异的原因 ,可能与杀配子染色体引起外源染色体片段结构变异有关 相似文献
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通过对（中国春phlb基因突变体×Ae. umbellulata）F#-1和（中国春×Ae. umbellulata）F#-1植株花粉母细胞减数分裂中期Ⅰ染色体配对情况的观察,首次证明了phlb基因可以诱导普通小麦与Ae.umbellulata间的部分同源染色体配对。同时,说明Ae. umbellulata中没有Ph1或Ph1-like基因。所以有可能利用phlb基因诱导部分同源染色体间的配对、交换,从而把Ae. umbellulata的有益基因导入普通小麦。 相似文献
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Investigation of Aegilopsumbellulatafor stripe rust resistance,heading date,and the contents of iron,zinc, and gluten protein 
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下载免费PDF全文 SONG Zhong-ping ZUO Yuan-yuan XIANG Qin LI Wen-jia LI Jian LIU Gang DAI Shou-fen YAN Ze-hong 《农业科学学报》2023,22(4):1258-1265
Aegilops umbellulata (UU) is a wheat wild relative that has potential use in the genetic improvement of wheat. In this study, 46 Ae. umbellulata accessions were investigated for stripe rust resistance, heading date (HD), and the contents of iron (Fe), zinc (Zn), and seed gluten proteins. Forty-two of the accessions were classified as resistant to stripe rust, while the other four accessions were classified as susceptible to stripe rust in four environments. The average HD of Ae. umbellulata was significantly longer than that of three common wheat cultivars (180.9 d vs. 137.0 d), with the exception of PI226500 (138.9 d). The Ae. umbellulata accessions also showed high variability in Fe (69.74–348.09 mg kg–1) and Zn (49.83–101.65 mg kg–1) contents. Three accessions (viz., PI542362, PI542363, and PI554399) showed relatively higher Fe (230.96–348.09 mg kg–1) and Zn (92.46–101.65 mg kg–1) contents than the others. The Fe content of Ae. umbellulata was similar to those of Ae. comosa and Ae. markgrafii but higher than those of Ae. tauschii and common wheat. Aegilops umbellulata showed a higher Zn content than Ae. tauschii, Ae. comosa, and common wheat, but a lower content than Ae. markgrafii. Furthermore, Ae. umbellulata had the highest proportion of γ-gliadin among all the species investigated (Ae. umbellulata vs. other species=mean 72.11% vs. 49.37%; range: 55.33–86.99% vs. 29.60–67.91%). These results demonstrated that Ae. umbellulata exhibits great diversity in the investigated traits, so it can provide a potential gene pool for the genetic improvement of these traits in wheat. 相似文献
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