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GUO Jun-Yang, CHEN Jin-Feng. Genomic Exchange and Rearrangement and Its Effect on Fertility of Male Gametophyte in Cucumis hytivus[J]. Plant Science Journal, 2005, 23(2): 107-110.
Citation: GUO Jun-Yang, CHEN Jin-Feng. Genomic Exchange and Rearrangement and Its Effect on Fertility of Male Gametophyte in Cucumis hytivus[J]. Plant Science Journal, 2005, 23(2): 107-110.
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Genomic Exchange and Rearrangement and Its Effect on Fertility of Male Gametophyte in Cucumis hytivus

  • College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China

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  • Received Date: July 11, 2004
  • Revised Date: September 21, 2004
  • Published Date: April 24, 2005
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  • Genomic exchange and rearrangement of the amphidiploid species Cucumis hytivus and its effect on fertility of male gametophyte were cytologically studied through making slides.Cytolo-(gical)evidences for genomic exchange and rearrangement were found,such as"8"and"cross"configu-(rations)at prophase,chain and ring multivalents at metaphase Ⅰ,as well as various abnormal chro-(mosome)structure including chromosome bridges,lagging,genomic separation,micronuclei etc,which probably resulted in unequivalent distribution of genetic germplasm.Such an extensive geno-(mic)exchange and rearrangement led to 93% polyads and some abnormal tetrads.Abnormal micro-(spores)in polyads and microspores with unbalance germplasm could not develop into normal male gametophytes,which is responsible for the low fertility of male gametophyte in Cucumis hytivus.
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