Tomato is an attractive fruiting vegetable crop that can be used as an ornamental plant. Agronomical traits have been subjected to extensive genetic dissection to enhance vegetable breeding programs. By contrast, there are few genetic studies of ornamental traits for the development of ornamental tomato varieties. To investigate genetic loci linked to desired ornamental traits, we performed genetic analyses using an intraspecific mapping population that segregated for fruit color (yellow or red), fruit shape (round or pear), and plant height (high or compact). A genetic map was constructed with 965 single nucleotide polymorphisms (SNPs) and 33 simple sequence repeat markers. Subsequent linkage analysis using quantitative locus analysis and genome‐wide association study detected four genetic loci for the three selected traits, all of which were located near the reported genes. We performed KASP—kompetitive allele‐specific PCR—to develop SNP markers that were tightly linked to the four loci. Highly accurate genotyping data were obtained from the four SNPs across 187 F2 plants, which enabled us to select two lines with homozygous alleles for compact plant size and yellow pear‐shaped fruits. These newly developed SNP markers and genetic strategies could be used to accelerate breeding programs for ornamental tomato plants.

中文翻译：

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四个遗传基因座控制紧凑的植物大小，并在观赏番茄（Solanum lycopersicum L.）中带有黄色梨形果实

番茄是一种有吸引力的果蔬作物，可以用作观赏植物。农艺性状已经过广泛的遗传解剖，以增强蔬菜育种程序。相比之下，很少有关于观赏性状的遗传研究可用于开发观赏性番茄品种。为了调查与所需装饰性状相关的遗传位点，我们使用种内作图种群进行了遗传分析，这些种群按果实颜色（黄色或红色），果实形状（圆形或梨形）和植物高度（高或紧密）进行了分离。用965个单核苷酸多态性（SNP）和33个简单的序列重复标记构建了遗传图谱。随后使用定量基因座分析和全基因组关联研究进行连锁分析，发现了三个选定性状的四个遗传位点，所有这些都位于报道的基因附近。我们进行了KASP（竞争性等位基因特异性PCR）来开发与四个基因座紧密相连的SNP标记。从187个F2植物的4个SNP中获得了高度准确的基因分型数据，这使我们能够选择两个具有纯合等位基因的品系来种植紧凑的植物尺寸和黄色梨形果实。这些新开发的SNP标记和遗传策略可用于加速观赏番茄植物的育种程序。