黑麦遗传变异对面包小麦(Triticum aestivum)杂种同源染色体配对的影响

P. Gupta, G. Fedak
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引用次数: 16

摘要

125个小麦× F1黑麦杂交植株的杂交频率为0.07 ~ 10.40个/细胞。其中,Triticum aestivum‘Chinese Spring’× Secale cereale F1(‘Petkus’ב高产’)杂交28科89株,‘Chinese Spring’× F1(‘高产’בPuma’)杂交11科36株。分析了黑麦遗传变异对同源染色体配对的影响。在前一种情况下,结果特别有趣,因为主基因的分离是明显的。在该杂交中,首先观察到双峰分布;其次,在3个科中观察到交叉频率在每细胞6.11 ~ 10.40次之间,但在3.0 ~ 6.0或6.11 ~ 9.82范围内没有杂交,呈不连续分布。结论是,“Petkus”的遗传系统与“多产”的遗传系统不同,并且具有主要影响的基因都是…
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The inheritance of genetic variation in rye (Secale cereale) affecting homoeologous chromosome pairing in hybrids with bread wheat (Triticum aestivum)
Chiasmata frequencies ranging from 0.07 to 10.40 per cell were recorded in 125 hybrid plants derived from wheat × F1 rye crosses. These included 89 plants belonging to 28 families from the Triticum aestivum 'Chinese Spring' × Secale cereale F1 ('Petkus' × 'Prolific') cross and 36 plants belonging to 11 families from the 'Chinese Spring' × F1 ('Prolific' × 'Puma') cross. The data were analyzed to study the inheritance of genetic variation in rye affecting homoeologous chromosome pairing. The results were particularly interesting in the former case where segregation for major genes was evident. First, in this cross, a bimodal distribution was observed and second, chiasmata frequencies ranging from 6.11 to 10.40 per cell were observed in three families but without any hybrid falling in either the range of 3.0 to 6.0 or in the range of 6.11 to 9.82, showing discontinuous distribution. It was concluded that the genetic system in 'Petkus' differs from that in 'Prolific', and that genes both with major effects a...
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