小麦× Agropyron × Aegilops speltoides纯合子系的染色体结构。2。准中心反转的筛选

Luis Ortiz, Á. González, M. Chueca, Y. Cauderon
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引用次数: 3

摘要

倒位的存在在小麦的进化和品种分化中具有重要意义,尽管我们还没有确凿的细胞学证据证明倒位在小麦中存在,但我们可以利用间接的方法,通过染色体后期I和II的染色体结构来筛选顺中心倒位。本研究将“中国春”结构(关于反向片段的存在)与(i)在小麦与Agropyron中间代换系和Aegilops speltoides同源配对启动子杂交的后代中获得的52个纯合子小麦品系和(ii)用于开发上述品系的三个小麦品种('Vilmorin 27', 'Ducat'和'Tormes')进行了比较。三个品种呈现相对于“中国春”结构的倒节。在研究的某些直线中可能保留了一些这些倒置的线段。其中四个显示了“中国春天”的原始结构,即使没有小麦亲本。鱼翅……
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Chromosomal structure of homozygous common wheat lines obtained from (wheat × Agropyron) × Aegilops speltoides derivatives. II. A screening of paracentric inversions
The presence of inversions is important in the evolution and cultivar differentiation of wheats, Even though we can't have conclusive cytological proof of the presence of inversions in wheat, we can use the indirect way of screening paracentric inversions through chromosome configuration at anaphase I and II. This work presents the comparison of 'Chinese Spring' structure (with respect to the presence of inverted segments) to (i) 52 homozygous wheat lines obtained in the progenies of the cross between a wheat × Agropyron intermedium substitution line and Aegilops speltoides homoeologous pairing promotor and (ii) three wheat cultivars ('Vilmorin 27', 'Ducat', and 'Tormes') that were used in developing the above mentioned lines. The three cultivars present inverted segments relative to 'Chinese Spring' structure. Some of these inverted segments are possibly maintained in some of the lines studied. Four of them show the primitive structure of 'Chinese Spring' even though none of the wheat parents had it. Fin...
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