The karyotype of the primary wheat wheatgrass alien addition line TAI 27 was 2 n=44 in which all of the chromosomes were metacentric and submetacentric.However,in the progeny of TAI 27 a pair of chromosomes had become...The karyotype of the primary wheat wheatgrass alien addition line TAI 27 was 2 n=44 in which all of the chromosomes were metacentric and submetacentric.However,in the progeny of TAI 27 a pair of chromosomes had become small chromosomes in the two morphologically different plants.Fluorescence in situ hybridization(FISH)technique was used to analyze the two different plants.The observations indicate that a pair of small chromosomes in one variation line are from wheatgrass.In another variation line,a pair of small chromosomes are also from wheatgrass,while another pair of wheatgrass chromosomes have substituted the wheat chromosomes.TAI 27 and its variant lines showed a high level of resistance to barley yellow dwarf virus(BYDV).The possible explanation for such a variation and the potential use of the variant lines were discussed briefly.展开更多
文摘The karyotype of the primary wheat wheatgrass alien addition line TAI 27 was 2 n=44 in which all of the chromosomes were metacentric and submetacentric.However,in the progeny of TAI 27 a pair of chromosomes had become small chromosomes in the two morphologically different plants.Fluorescence in situ hybridization(FISH)technique was used to analyze the two different plants.The observations indicate that a pair of small chromosomes in one variation line are from wheatgrass.In another variation line,a pair of small chromosomes are also from wheatgrass,while another pair of wheatgrass chromosomes have substituted the wheat chromosomes.TAI 27 and its variant lines showed a high level of resistance to barley yellow dwarf virus(BYDV).The possible explanation for such a variation and the potential use of the variant lines were discussed briefly.
