Passiflora edulis f. flavicarpa is the most economically important species in the genus Passiflora. However, the origin of this yellow form of passion fruit remains unclear, being suggested as a hybrid (P. edulis f. edulis × P. ligularis) or wild mutant. Here, the origin and genomic relationships of P. edulis f. flavicarpa with some related species in the genus Passiflora (subgenera Decaloba and Passiflora) were investigated using genomic in situ hybridization (GISH). Genomic DNA of 18 species was used as probe, which was hybridized onto chromosomes of P. edulis f. flavicarpa. Of all genomic DNA probes tested, none allowed us to identify a specific chromosome set in P. edulis f. flavicarpa. Conversely, probes from the subgenus Passiflora, P. edulis f. edulis, P. alata, P. cincinnata, P. coccinea, P. nitida and P. vitifolia, produced intense and uniform hybridizations on all chromosomes of P. edulis f. flavicarpa. Moreover, probes from P. ligularis, P. foetida and P. sublanceolata produced more intense hybridizations in the terminal region of four chromosomes, corresponding to the DNAr 45S locus, and also dispersed, less intense, hybridization across all chromosomes. Probes from the subgenus Decaloba, P. biflora, P. capsularis, P. cervii, P. coriacea, P. micropetala, P. morifolia, P. rubra and P. suberosa, produced hybridizations restricted to the DNAr 45S sites. The hybrid origin of P. edulis f. flavicarpa could not be supported based on the GISH results, and it is suggested that this species is conspecific with P. edulis f. edulis, because the probe with DNA of this form hybridized strongly throughout the target genome. The other putative parent species, P. ligularis, showed only a distant relationship with the target genome. The results also suggest that species of the subgenus Passiflora share many repetitive sequences and that the relationship between subgenera Decaloba and Passiflora is very distant.

中文翻译：

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栽培百香果西番莲的起源。黄果和十足亚种和西番莲属物种之间的基因组关系。

西番莲f。黄皮是西番莲属中最经济重要的物种。然而，这种黄色形式的百香果的起源尚不清楚，被认为是杂种（P. edulis f。edulis×P. ligularis）或野生突变体。在这里，可食假单胞菌的起源和基因组关系。利用基因组原位杂交技术（GISH）研究了西番莲属中的一些黄果（黄花木属和西番莲属）。以18种基因组DNA为探针，杂交到食用番茄的染色体上。黄果。在所有测试的基因组DNA探针中，没有一个能够让我们鉴定出可食的P. edulis f。中的特定染色体组。黄果。相反地​​，来自西番莲属（P. edulis f。）的探针。可食，阿拉斯加体育，cincinnata体育，coccinea体育，nitida体育和vitifolia，在食用假单胞菌的所有染色体上产生强烈而均匀的杂交。黄果。此外，来自舌头对虾，对虾对虾和对虾对虾的探针在对应于DNAr 45S基因座的四个染色体的末端区域产生了更强的杂交，并且在所有染色体上的分散，强度较低的杂交。来自Decaloba，P。biflora，P。荚膜藻，P。cervii，P。coriacea，P。micropetala，P。morifolia，P。rubra和P. suberosa亚属的探针产生仅限于DNAr 45S位点的杂交。食用假单胞菌的杂种起源。基于GISH结果不能支持黄果树，这表明该物种与P. edulis f是同种的。可食，因为带有这种形式DNA的探针在整个靶基因组中都强烈杂交。其他推定的亲本种，P。ligularis仅显示与靶基因组的远距离关系。结果还表明，西番莲亚属的物种具有许多重复序列，并且Decaloba亚属与西番莲之间的关系非常遥远。