摘要
本文分析了南京早椒（ＣａｐｓｉｃｕｍｆｒｕｔｅｓｃｅｎｓＬ．ｖａｒ．ＣｏｎｏｉｄｅｅｓＢａｉｌｅｙ）和Ｃ．ｃｈｉｎｅｎｓｅ二亲本及Ｆ１杂种花粉母细胞减数分裂终变期和中期Ｉ染色体配对的构型。结果表明：二亲本花粉母细胞减数分裂染色体配对均正常，为１２个二价体（双单倍体２ｎ＝２４）。Ｆ１杂种花粉母细胞减数分裂染色体配对很不规则。其平均频率分别为单价体０．０３６，二价体９．１８，三价体０．０３６，四价体０．８０，六价体０．３８。南京早椒和Ｃ．ｃｈｉｎｅｎｓｅ染色体间存在着相互易位，因此，二亲本间彼此有差异。单价体出现极少，这可断定南京早椒与Ｃ．ｃｈｉｎｅｎｓｅ染色体间是部分同源的，但染色体组结构上存在着差异。由于染色体结构上差异，所以Ｆ１杂种的育性较低。
he configuration of chromosome pairing in pollen mother cells at the meiotic dakinesis and metaphase I in the two parents and F1 hybrid was analysedThe results showed that the chromosome pairing in pollen mother cells of two parents at meiosis was normalThe chromosome configuration was 12 bivalents (amphidiploid,2n=24)The chromosome pairing in pollen mother cells at meiosis of F1 hybrid was very irregularThe average frequency was 0036 for univalent,918 for bivalent,0036 for trivalent,080 forquadrevalent and 038 for hexavalentThe phenomenon of reciprocal translocation and a few univalents was observedIt was concluded that the chromosomes of Nanjing Zao Jiao and Cchinense were partially homologousThe fertility of F1 hybrid was very low due to the structural differences in chromosomes of Nanjing Zao Jiao and Cchinense
关键词
辣椒
种间杂种
细胞遗传学
Chilli,Interspecific hybrid,Meiosis,Chromosome pairing,Reciprocal translocation
