Kang H Y, Wang Y, Yuan H J, Jiang Y, Zhou Y H
Triticeae Research Institute, Sichuan Agricultural University, Dujiangyan 611830, Sichuan, China.
Genetika. 2009 Jun;45(6):766-72.
Dwarfing polish wheat is a dwarfing accession of Triticum polonicum L. from Xinjiang of China. In the present study, the artificial hybridization between dwarfing polish wheat and two accessions of Aegilops tauschii Cosson. (AS60 and AS65) was carried out, and the F1 hybrids were obtained successfully without using embryo rescue techniques for the first time. The crossabilities of hybrids T. polonicum x Ae. tauschii (AS60) and T. polonicum x Ae. tauschii (AS65) were 1.67% and 0.60% respectively. Only the hybrids of T. polonicum x Ae. tauschii (AS60) germinated well, and 24 Fl hybrid plants were obtained. All the F1 hybrid plants grew vigorously, and the morphological traits were similar to bread wheat. The F1 plants had some obvious traits inherited from T. polonicum and Ae. tauschii and were completely sterile. Chromosome pairing in the hybrid was characterized by a large number of univalents, with an average of 20.56 and 0.22 bivalents per PMC, and no ring bivalents and multivalents were observed. Furthermore, the potential value of the F1 hybrids between T. polonicum and Ae. tauschii for studying wheat origin and breeding are discussed.
矮秆波兰小麦是来自中国新疆的波兰小麦（Triticum polonicum L.）的一个矮秆材料。在本研究中，进行了矮秆波兰小麦与节节麦（Aegilops tauschii Cosson.）的两个材料（AS60和AS65）之间的人工杂交，首次未使用胚拯救技术就成功获得了F1杂种。波兰小麦×节节麦（AS60）和波兰小麦×节节麦（AS65）的杂交亲和性分别为1.67%和0.60%。只有波兰小麦×节节麦（AS60）的杂种发芽良好，获得了24株F1杂种植物。所有F1杂种植物生长旺盛，形态特征与普通小麦相似。F1植株具有一些明显的从波兰小麦和节节麦遗传而来的性状，并且完全不育。杂种中的染色体配对特征是大量单价体，每个花粉母细胞平均有20.56个单价体和0.22个二价体，未观察到环状二价体和多价体。此外，还讨论了波兰小麦与节节麦之间F1杂种在小麦起源研究和育种方面的潜在价值。
