对亲本披碱草(E lym us d ahuricus)和野大麦(H ord eum brev isubu la tum)及其杂种F1和BC1代体细胞染色体数和花粉母细胞(PM C)减数分裂染色体行为进行观察和分析。结果表明:亲本披碱草的染色体数为2n=42,野大麦为2n=28;正、反交杂种F...对亲本披碱草(E lym us d ahuricus)和野大麦(H ord eum brev isubu la tum)及其杂种F1和BC1代体细胞染色体数和花粉母细胞(PM C)减数分裂染色体行为进行观察和分析。结果表明:亲本披碱草的染色体数为2n=42,野大麦为2n=28;正、反交杂种F1染色体数均为35;BC1代染色体发生了数目上的差异,变异范围为28~35,并出现很多非整倍性植株;披碱草的PM CM I二价体配对频率很高,野大麦PM CM I出版少量的四价体、三价体和单价体,但以二价体占优势;正反交杂种F1减数分裂不规则,单价体的普遍存在是造成杂交不育的重要原因;BC1代的PM CM I单价体频率较F1代有所下降,二价体频率有所增高,有些株系的环状二价体占绝对优势,这为杂种育性恢复提供了细胞学依据。展开更多
In this study, karyotype analysis of F2BCl progenies between sugarcane (Saccharum spp. ) and Erianthusfulvus was conducted. The result showed that most chromosomes of YAU04/14, YAU09/02, YAU09/05, YAU09/26 and YAU09...In this study, karyotype analysis of F2BCl progenies between sugarcane (Saccharum spp. ) and Erianthusfulvus was conducted. The result showed that most chromosomes of YAU04/14, YAU09/02, YAU09/05, YAU09/26 and YAU09/52 are median region (m) chromosomes, while only a small amount of chromosomes are submedian (sin) chromosomes and median point (M) chromosomes. The karyotype formulae of five experimental materials are 2n = 106 = 98m + 8sm, 2n = 106 - 2M + 104m, 2n = 106 = 4M + 96m + 6sin, 2n = 102 = 2M + 92m + 8sin and 2n = 106 = 4M + 96m + 6sin, respectively. The karyotypes of all materials belong to symmetrical 2B type, indicating that the chromosomes of progenies are primitive.展开更多
文摘对亲本披碱草(E lym us d ahuricus)和野大麦(H ord eum brev isubu la tum)及其杂种F1和BC1代体细胞染色体数和花粉母细胞(PM C)减数分裂染色体行为进行观察和分析。结果表明:亲本披碱草的染色体数为2n=42,野大麦为2n=28;正、反交杂种F1染色体数均为35;BC1代染色体发生了数目上的差异,变异范围为28~35,并出现很多非整倍性植株;披碱草的PM CM I二价体配对频率很高,野大麦PM CM I出版少量的四价体、三价体和单价体,但以二价体占优势;正反交杂种F1减数分裂不规则,单价体的普遍存在是造成杂交不育的重要原因;BC1代的PM CM I单价体频率较F1代有所下降,二价体频率有所增高,有些株系的环状二价体占绝对优势,这为杂种育性恢复提供了细胞学依据。
基金Supported by National Natural Science Foundation of China(30960045)Program for Construction of Modern Agricultural Sugarcane Industry Technology System of Yunnan Province(YCJ[2014]No.105)+3 种基金Key Project of New Product Development of Yunnan Province(Agriculture,2012BB014)Innovation Team Project for Sustainable Production System of Mountain Plateau Crops of Yunnan Agricultural University(YKRF[2012]No.18)Research Fund for the Doctoral Program of Yunnan Agricultural University(A2002181)General Program of Applied Basic Research of Yunnan Province(2013FB037)
文摘In this study, karyotype analysis of F2BCl progenies between sugarcane (Saccharum spp. ) and Erianthusfulvus was conducted. The result showed that most chromosomes of YAU04/14, YAU09/02, YAU09/05, YAU09/26 and YAU09/52 are median region (m) chromosomes, while only a small amount of chromosomes are submedian (sin) chromosomes and median point (M) chromosomes. The karyotype formulae of five experimental materials are 2n = 106 = 98m + 8sm, 2n = 106 - 2M + 104m, 2n = 106 = 4M + 96m + 6sin, 2n = 102 = 2M + 92m + 8sin and 2n = 106 = 4M + 96m + 6sin, respectively. The karyotypes of all materials belong to symmetrical 2B type, indicating that the chromosomes of progenies are primitive.