Molecular insights into the purple‐flowered ancestor of garden petunias

Segatto, Ana Lúcia Anversa; Ramos-Fregonezi, Aline M. C.; Bonatto, Sandro L.; Freitas, Loreta B.

doi:10.3732/ajb.1300223

Cited by 25 publications

(22 citation statements)

References 47 publications

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“…2011 ). A recent study involving wild Petunia species and commercial P. hybrida ( Segatto et al . 2014 b ) showed that P. integrifolia species complex share several alleles and also have a low mean number of alleles per locus (ﬁve in Petunia inﬂata , four in P. integrifolia and three in Petunia interior ).…”

Section: Discussionmentioning

confidence: 99%

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Genetic differentiation and hybrid identification using microsatellite markers in closely related wild species

et al. 2015

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Despite extensive morphological diversity and different floral syndromes, two wild Petunia species are closely related, present high genetic similarity, and field observations suggest natural hybridization between them. Here we described helpful tools for evolutionary studies addressing genetic population, interspecific hybridization, and plant speciation. Based on previously described microsatellites of Petunia hybrida we were able to identify private alleles characterizing species and their putative hybrids. These profiles could also be useful to study gene flow, population structure, genetic conservation and landscape.

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Section: Discussionmentioning

confidence: 99%

“…2010 ; Fregonezi et al . 2013 ), and one artificial hybrid known worldwide, the commercial Petunia hybrida that is the result of crossings between Petunia axillaris and Petunia interior ( Segatto et al . 2014 b ).…”

Section: Introductionmentioning

confidence: 99%

Genetic differentiation and hybrid identification using microsatellite markers in closely related wild species

et al. 2015

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“…The commercial P. hybrida is derived from crosses between a white-flowered, moth-pollinated P. axillaris, and species of the P. integrifolia clade, a group of closely related bee-pollinated species and subspecies ( Fig. 1) 6,7 .…”

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confidence: 99%

Insight into the evolution of the Solanaceae from the parental genomes of Petunia hybrida

et al. 2016

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Petunia hybrida is a popular bedding plant that has a long history as a genetic model system. We report the whole-genome sequencing and assembly of inbred derivatives of its two wild parents, P. axillaris N and P. inflata S6. The assemblies include 91.3% and 90.2% coverage of their diploid genomes (1.4 Gb; 2n = 14) containing 32,928 and 36,697 protein-coding genes, respectively. The genomes reveal that the Petunia lineage has experienced at least two rounds of hexaploidization: the older gamma event, which is shared with most Eudicots, and a more recent Solanaceae event that is shared with tomato and other solanaceous species. Transcription factors involved in the shift from bee to moth pollination reside in particularly dynamic regions of the genome, which may have been key to the remarkable diversity of floral colour patterns and pollination systems. The high-quality genome sequences will enhance the value of Petunia as a model system for research on unique biological phenomena such as small RNAs, symbiosis, self-incompatibility and circadian rhythms.

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“…The garden petunia, Petunia hybrida, was bred from mothpollinated P. axillaris and a bee-pollinated species of the P. integrifolia clade that includes P. inflate (Segatto et al, 2014;Stehmann et al, 2009), producing a wide variety of cultivars. The white-flowered P. axillaris has a strong and sweet fragrance during the night.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Floral Scent Compounds in a New Fragrant Petunia Cultivar TX-794 ‘Evening Scentsation’

et al. 2018

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A new blue petunia cultivar, TX-794 bred by Takii & Co., Ltd, has a sweet floral fragrance different from conventional petunia cultivars that typically have no odor or have a somewhat unfavorable smell. Since fragrant bedding plants suitable for summer cultivation are rare, we expect that the fragrance will enhance the value of TX-794. The characteristics of emitted scent compounds from TX-794 were evaluated in this study. The major scent compound was phenylacetaldehyde, a C6-C2 aromatic compound that was emitted at higher levels in TX-794 compared to conventional petunia cultivars. iso-Eugenol, a C6-C3 aromatic compound, is the major scent compound in conventional petunia cultivars. These results suggest that TX-794 has a high capacity to biosynthesize C6-C2 aromatic compounds, resulting in a significantly different scent compound composition compared to conventional petunia cultivars. Time-course analysis of scent compound emission revealed that the largest release of scent compounds by TX-794 occurs during the switch from light periods to dark periods. Soon after flowering, that is, in the light period on the day of anthesis, the major scent compound was p-cresol. Thereafter, the primary scent compound was phenylacetaldehyde or methyl benzoate with 2-phenylethanol occupying the next position. Since a bed or a container of petunias has flowers that are primarily over 2-days old, the basic fragrance of TX-794 plants is derived from phenylacetaldehyde, which has a hyacinth-like scent, 2-phenylethanol, which has a rose-like scent, and methyl benzoate, which has a dry fruitlike scent.

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Molecular insights into the purple‐flowered ancestor of garden petunias

Abstract: Our work will contribute to the clarification of the evolutionary relationships among the Petunia ×hybrida and P. integrifolia taxa group and could be useful in breeding programs to transfer desired traits from wild to cultivated species.

Cited by 25 publications

References 47 publications

Genetic differentiation and hybrid identification using microsatellite markers in closely related wild species

Genetic differentiation and hybrid identification using microsatellite markers in closely related wild species

Insight into the evolution of the Solanaceae from the parental genomes of Petunia hybrida

Characteristics of Floral Scent Compounds in a New Fragrant Petunia Cultivar TX-794 ‘Evening Scentsation’

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