TRITICUM AESTIVUM,DASYPYRUM VILLOSUM,"/> 普通小麦与簇毛麦的属间杂种及其双二倍性个体的形态学和染色体配对

四川农业大学学报 ›› 1996, Vol. 14 ›› Issue (02): 171-176,170.doi: 10.16036/j.issn.1000-2650.1996.02.005

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普通小麦与簇毛麦的属间杂种及其双二倍性个体的形态学和染色体配对

付体华, 任正隆   

  1. 四川农业大学小麦研究所, 都江堰市 611830
  • 收稿日期:1995-08-25 出版日期:1996-06-30 发布日期:2017-03-07

MORPHOLOGY AND CHROMOSOME PAIRING OF A HYBRID AND AMPHIPLOIDY INDIVIDUALS OF TRITICUM AESTIVUM L. WITH DASYPYRUM VILLOSUM(L.) CANDARGY

Fu Tihua, Ren Zhenglong   

  1. Triticeae Research Institute, SicluanAgricultural University/Dujiangyan, Sichuan, China 611830
  • Received:1995-08-25 Online:1996-06-30 Published:2017-03-07

摘要: 通过远缘杂交和秋水仙碱溶液的加倍,获得了普通小麦(AABBDD)与簇毛麦(VV)的属间杂种和五株双二倍性个体。该四倍体杂种F1(ABDV)形态类似于母本普通小麦,但也表现出穗轴易断和颖上具绒毛等簇毛麦的特征。减数分裂配对研究指出,在簇毛麦的不同基因型组合中,可能存在一个多基因系统控制部分同源染色体的配对。双二倍性个体仅有两株发育至成熟,它们皆为非整信体。一株为某一染色体的单体(2n=55);另一株为一自然回交的个体(2n=49)。不管是F1杂种或者是其双二倍性个体,减数分裂后期都表现为不正常分裂。在本期Ⅱ主要产生多分体或多分体,而不是四分体,导致雄性不育,而双二倍性个体则部分雌性可育。因而对其双二倍性个体进行回交,易产生后代。另外,本文还阐明了合成八倍性双二倍性植株在遗传研究中的优越性。

关键词: 属间杂种, 双二倍体[45CF], 细胞学, 小麦[49EJ, 61DA], 簇毛麦

Abstract: Intergeneric hybrid and amphiploidy individuals of Triticum aestivum L.(2n=42, AABBDD) with Dasypyrum villosum(L.) Candargy(2n=14, VV) were produced by direct hybridization and colchicine treatment. The 4x(ABDV) hybrid resembled its wheat parent except complete male sterility, and associated with brittle and hairy rachis. It is suggested that there be a multigene system in the genotypes of D. villosum to control homoeologous pairing in the F1's. Morphologically, 8x amphiploidy indviduals were similar to its F1's in every, and exhibited less vigorous and highly male sterility and partially female fertility. The use and importance of D. villosum chromosomes in a pure common wheat background for wheat improvement and genetic study were suggested.

Key words: INTERGENERIC HYBRID, AMPHIDIPLOID, CYTOLOGY, TRITICUM AESTIVUM')">TRITICUM AESTIVUM, DASYPYRUM VILLOSUM')">DASYPYRUM VILLOSUM

中图分类号: 

  • S512.1