Laboratorio Valorizzazione Colture Industriali del CNEN, C.S.N. Casaccia, Roma, Italy.
Theor Appl Genet. 1978 Nov;51(6):271-5. doi: 10.1007/BF00274814.
The transmission rate of trisomy was determined for two primary trisomic types, triplo-1 and triplo-3, of the self-incompatible species Lycopersicum peruvianum. Chromosome counts in somatic metaphases of root-tip squashes from 112 progeny plants showed that 8 individuals (7.2 %) were trisomic and 104 (92.8%) were diploid. The average frequency of transmission approximated 2.6% in triplo-1 and 8.6% in triplo-3. Data are presented on the karyotype and the morphological features of the 8 trisomics detected in the progenies of triplo-1 and triplo-3 and the various factors affecting the transmission rate of trisomy are discussed.The transmission rate of trisomy was also determined for the trisomic plant 269 which displayed a complete deletion of the satellited part of chromosome 2 and was characterized by ovate fruits. Out of 18 progeny plants analysed, 8 (44.4%) were trisomic and 10 (55.6%) were diploid. Cytological and morphological analyses of the 8 trisomic individuals revealed that only two of them (11.1 %) resembled the parental trisomic. A number of diploid and trisomic progenies exhibited a partial or a complete deletion of the satellited segment of chromosome 2.
对自交不亲和种秘鲁番茄的两种主要三体类型（三体-1 和三体-3）的三体发生率进行了测定。112 株后代植物根尖体细胞中期染色体计数表明，8 株（7.2%）为三体，104 株（92.8%）为二倍体。三体-1 的平均传递频率接近 2.6%，三体-3 的平均传递频率接近 8.6%。本文介绍了在三体-1 和三体-3 的后代中检测到的 8 个三体的核型和形态特征，以及影响三体发生率的各种因素。还对三体植株 269 的三体发生率进行了测定，该植株显示出 2 号染色体卫星部分的完全缺失，其果实呈卵形。在分析的 18 株后代植物中，8 株（44.4%）为三体，10 株（55.6%）为二倍体。对 8 个三体个体的细胞学和形态学分析表明，只有 2 个（11.1%）与亲本三体相似。一些二倍体和三体后代表现出 2 号染色体卫星片段的部分或完全缺失。
