[栽培番茄中番茄近缘野生种（Solanum lycopersicoides Dun.）异源染色体附加系的细胞遗传学特征分析]
[Cytogenetic characterization of Solanum lycopersicoides Dun. alien chromosome additions in cultivated tomato].
作者信息
Solov'ev A A, Kniazev A N, Aleksandrov O S
出版信息
Genetika. 2007 Jun;43(6):790-5.
Cytogenetic analysis of five Solanum lycopersicoides monosomic alien addition lines of tomato was carried out. Meiotic analysis showed that additional chromosomes caused serious abnormalities. It was demonstrated that different chromosomes of S. lycopersicoides had different effects on chromosome pairing. For instance, associations formed between chromosomes II and IV of S. lycopersicoides and chromosomes of cultured tomato were trivalents, while chromosome XI in all cells was present as a univalent. Pachytene analysis showed that chromosomes of homeologous group II paired at their long arms, and their nucleolus organizer regions were of different sizes. The use of molecular markers provided accelerated identification of the introgression of S. lyvcopersicoides genetic material.
对五个番茄的多毛番茄单体异附加系进行了细胞遗传学分析。减数分裂分析表明，附加染色体导致了严重的异常。结果表明，多毛番茄的不同染色体对染色体配对有不同影响。例如，多毛番茄的II号和IV号染色体与栽培番茄的染色体之间形成的联会是三价体，而在所有细胞中XI号染色体均以单价体形式存在。粗线期分析表明，同源群II的染色体在其长臂处配对，并且它们的核仁组织区大小不同。分子标记的使用加快了对多毛番茄遗传物质渗入情况的鉴定。
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