The genus Pyrus L. (Rosaceae) in south-west Europe and North Africa

Aldasoro, Juan José; Aedo, Carlos; Garmendia, Félix Muñoz

doi:10.1111/j.1095-8339.1996.tb00749.x

Cited by 28 publications

(31 citation statements)

References 6 publications

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“…The position of P. betulifolia at the first independent branch in the Oriental pears might be related to its older origin (Zheng et al, 2011), which was confirmed by recent phylogenetic research from our research group (unpublished data). The species and cultivars in A2 displayed a complex relationship with a lower confidence coefficient, probably due to wide hybridization within Pyrus (Aldasoro et al, 1996). Some species of unknown or controversial origin were also included in this validation experiment, such as P. hopeiensis and P. phaeocarpa.…”

Section: Assessment Of the Genetic Relationship Among 28 Pyrus Accessmentioning

confidence: 99%

Development of genic SSR markers from transcriptome sequencing of pear buds

Yue

Liu

Zong

et al. 2014

J. Zhejiang Univ. Sci. B

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A total of 8375 genic simple sequence repeat (SSR) loci were discovered from a unigene set assembled from 116 282 transcriptomic unigenes in this study. Dinucleotide repeat motifs were the most common with a frequency of 65.11%, followed by trinucleotide (32.81%). A total of 4100 primer pairs were designed from the SSR loci. Of these, 343 primer pairs (repeat length ≥15 bp) were synthesized with an M13 tail and tested for stable amplification and polymorphism in four Pyrus accessions. After the preliminary test, 104 polymorphic genic SSR markers were developed; dinucleotide and trinucleotide repeats represented 97.11% (101) of these. Twenty-eight polymorphic genic SSR markers were selected randomly to further validate genetic diversity among 28 Pyrus accessions. These markers displayed a high level of polymorphism. The number of alleles at these SSR loci ranged from 2 to 17, with a mean of 9.43 alleles per locus, and the polymorphism information content (PIC) values ranged from 0.26 to 0.91. The UPGMA (unweighted pair-group method with arithmetic average) cluster analysis grouped the 28 Pyrus accessions into two groups: Oriental pears and Occidental pears, which are congruent to the traditional taxonomy, demonstrating their effectiveness in analyzing Pyrus phylogenetic relationships, enriching rare Pyrus EST-SSR resources, and confirming the potential value of a pear transcriptome database for the development of new SSR markers.

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Section: Assessment Of the Genetic Relationship Among 28 Pyrus Accessmentioning

confidence: 99%

Development of genic SSR markers from transcriptome sequencing of pear buds

Yue

Liu

Zong

et al. 2014

J. Zhejiang Univ. Sci. B

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“…Sorbus) (Browicz, 1971;Likhonos, 1974;Phipps, 1990;Phipps et al, 1990), Cotoneaster, Pyracantha, Pyrus and Sorbus (subg. Aria), are exclusively Palearctic Browicz, 1992;Aldasoro et al, 1996Aldasoro et al, , 1998b.…”

Section: Analysis Of Regionsmentioning

confidence: 99%

Phylogenetic and Phytogeographical Relationships in Maloideae (Rosaceae) Based on Morphological and Anatomical Characters

Aldasoro¹,

Aedo²,

Navarro³

2005

blum - j plant tax and plant geog

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SUMMARYPhylogenetic relationships among 24 genera of Rosaceae subfam. Maloideae and Spiraeoideae are explored by means of a cladistic analysis; 16 morphological and anatomical characters were included in the analysis. Published suprageneric classifications and characters used in these classifications are briefly reviewed. Additionally, some new features are here reported, such as seed shape, presence or absence of endosperm, and number of cell layers in the seed coat and in the endosperm. Parsimony analyses indicate that Eriobotrya and Rhaphiolepis form a well-supported clade that is the sister to the remainder of the subfamily. This result is in agreement with published ITS sequence data. other clades are not supported, with the exception of the group Amelanchier-Peraphyllum-Malacomeles. Results of several studies point toward North America as centre of origin for Maloideae, considering the distribution of closely related Spiraeoideae such as Vauquelinia and Lindleia. A non-metric multidimensional scaling analysis of Takhtajan's biogeographic regions was carried out using presence/ absence of genera as characters. Eastern Asia is a centre of diversity from which the number of shared taxa decreases in several directions. This can be associated with the retreat of many taxa belonging to the Early Tertiary tropical-subtropical flora towards the refuges of China, Indochina and Malaysia, after wet-temperate forests were progressively transformed during the Neogene, which seems to be the case of Eriobotrya and Rhaphiolepis. Finally, Osteomeles and Chamaemeles were postulated as long-distance dispersion events while Hesperomeles could have originated in North America and migrated into north-western South America.

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“…The other important character, crenulate or serrulate leaf margin, is inconspicuous and some have crenate-serrate margins together. Aldasoro et al (1996) showed that the width of fruit peduncle, petal size, leaf width, and petiole length are discriminative, particularly in distinguishing some Pyrus taxa, including P. cordata. They also evaluated P. cordata and P. boissieriana by carrying out a multivariate morphometric study and concluded that these are the same species.…”

Section: Discussionmentioning

confidence: 99%

Taxonomic and nomenclatural contributions to Pyrus L. (Rosaceae) from Turkey

Aydın¹,

Dönmez²

2015

Turk J Bot

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IntroductionPyrus L. belongs to the subtribe Pyrinae of Rosaceae (Potter et al., 2007). The genus, including both pears and apples, was first described by Linnaeus (1753), and the first comprehensive study of the genus was published by Decaisne (1871-1872), with 23 species arranged in six groups. After that, Koehne (1890) described two sections, Pashia Koehne and Achras Koehne. Fedorov (1954) accepted Koehne's infrageneric classification and he added two new sections, namely Xeropyrenia Fed. and Argyromalon Fed. These two new sections comprised several microspecies and hybrid species from the Caucasus. The new sections are treated as a subsection by Tuz (1972) andBrowicz (1972), who included them in Flora of Turkey. Challice and Westwood (1973) also proposed further relationships for intrageneric taxa based on chemical and morphological characters.More than 80 species are recognized within the genus Pyrus (Browicz, 1993) and 73 of them are abundant in Eurasia (Robertson et al., 1991). In the Irano-Turanian and Mediterranean floristic regions Pyrus is represented by 12 species in

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The genus Pyrus L. (Rosaceae) in south-west Europe and North Africa

Cited by 28 publications

References 6 publications

Development of genic SSR markers from transcriptome sequencing of pear buds

Development of genic SSR markers from transcriptome sequencing of pear buds

Phylogenetic and Phytogeographical Relationships in Maloideae (Rosaceae) Based on Morphological and Anatomical Characters

Taxonomic and nomenclatural contributions to Pyrus L. (Rosaceae) from Turkey

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