Polyploidy, hybridization and evolution inPratia(Campanulaceae)
نویسندگان
چکیده
منابع مشابه
Genome evolution in alpine oat-like grasses through homoploid hybridization and polyploidy
Hybridization and polyploidization can radically impact genome organization from sequence level to chromosome structure. As a result, often in response to environmental change and species isolation, the development of novel traits can arise and will tend to result in the formation of homoploid or polyploid hybrid species. In this study we focus on evidence of hybridization and polyploidization ...
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BACKGROUND AND AIMS Speciation in angiosperms can be accompanied by changes in floral colour that may influence pollinator preference and reproductive isolation. This study investigates whether changes in floral colour can accompany polyploid and homoploid hybridization, important processes in angiosperm evolution. METHODS Spectral reflectance of corolla tissue was examined for 60 Nicotiana (...
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It is becoming increasingly evident that interspecific hybridization is a common event in phytophthora evolution. Yet, the fundamental processes underlying interspecific hybridization and the consequences for its ecological fitness and distribution are not well understood. We studied hybridization events in phytophthora clade 8b. This is a cold-tolerant group of plant pathogenic oomycetes in wh...
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The results from the investigation and analysis of the chromosome numbers and ploidy levels of 141 species and not nominal subspecies of Brassicaceae, their distribution and phytogeographical relations are discussed. Nearly 65 % of the taxa are diploids, most of them perennials, Mediterranean, Anatolian and Pontic floristic elements. Another 35 % are polyploids, c. 2/3 of them with tetraploid c...
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This article describes the use of cytogenomic and molecular approaches to explore the origin and evolution of Cardamine schulzii, a textbook example of a recent allopolyploid, in its ~110-year history of human-induced hybridization and allopolyploidy in the Swiss Alps. Triploids are typically viewed as bridges between diploids and tetraploids but rarely as parental genomes of high-level hybrids...
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ژورنال
عنوان ژورنال: New Zealand Journal of Botany
سال: 2004
ISSN: 0028-825X,1175-8643
DOI: 10.1080/0028825x.2004.9512937