Genome recombination in intergeneric hybrids between tetraploid Festuca pratensis and Lolium multiflorum

Zwierzykowski, Z.

doi:10.1093/jhered/89.4.324

Cited by 79 publications

(86 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A higher proportion of Lolium chromatin was also determined by Zwierzykowski et al (1998a), from GISH work carried out in three F 8 hybrid populations; and this observation is supported by more recent studies in Festulolium braunii varieties of Polish origin, where Lolium contributes 49-71 % of the total chromatin (Zwierzykowski et al, 2003). A similar ratio of Lolium:Festuca chromatin, equal to about 3:1, was also found in 28 chromosome androgenic plants derived from anther culture of a pentaploid F. arundinacea × L. multiflorum hybrid (Zwierzykowski et al, 1998b). Evidently the extent of inter-genome recombination and of chromosome substitution varies according to genotypes and to species used.…”

Section: Genome Balance In New "Species"supporting

confidence: 60%

A decade of “chromosome painting” in Lolium and Festuca

Pašakinskiené

Jones²

2005

Cytogenet Genome Res

View full text Add to dashboard Cite

GISH has been a particularly useful technique for studying the Lolium-Festuca species complex of forage grasses. The reason for this utility is two-fold: (i) the complex is unique amongst crop plants in which fertile hybrids, and backcross progenies, can be produced which recombine genomes and promiscuously exchange their genes through homoeologous recombination; (ii) dispersed repetitive DNAs differ between species, and this allows tracking of the identity of chromosomes and chromosome segments. This tracking property has enabled several fruitful lines of research to produce a harvest of new information for both fundamental and practical purposes. We review this first decade of GISH (genomic in situ hybridization) in Lolium-Festuca, and discuss and summarize the achievements which have accrued.

show abstract

Section: Genome Balance In New "Species"supporting

confidence: 60%

A decade of “chromosome painting” in Lolium and Festuca

Pašakinskiené

Jones²

2005

Cytogenet Genome Res

View full text Add to dashboard Cite

show abstract

“…This indicates that there are prospects of using analytic breeding in more ornamental crops other than lily. The potential for genetic variation and consequently the possibility for selection at the diploid level has been practiced in some other crops of economic importance like Lycopersicon esculentum £ Solanum lycopersicoides (Chetelat et al 1997) and Festuca £ Lolium (Zwierzykowski et al 1998;Thomas et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Potential for analytic breeding in allopolyploids: an illustration from Longiflorum × Asiatic hybrid lilies (Lilium)

et al. 2008

View full text Add to dashboard Cite

Ploidy level and intergenomic recombination was studied in interspeciWc hybrids between LongiXorum £ Asiatic lilies (LA hybrid) backcross to Asiatic parents in order to assess the possibility for analytic breeding in lily. By backcrossing the diploid (2n = 2x = 24) F1 interspeciWc hybrid between LongiXorum £ Asiatic lilies to Asiatic parents, 104 BC1 progeny plants were produced. Among these, there were 27 diploids, 73 triploids (2n = 2x = 36) and 4 aneuploids (2x ¡ 1, 2x + 2 or 2x + 3). In addition, by backcrossing triploid BC1 (LAA) plants to diploid Asiatic parents in 2x ¡ 3x and reciprocal combinations, 14 diploid BC2 progenies were produced. Genomic in situ hybridization (GISH) was performed to study the intergenomic recombination and karyotype composition. GISH indicated extensive intergenomic recombination among the chromosomes in LA hybrids. A large number of LongiXorum chromosomes were transmitted to the BC1 progenies from LA hybrids. However, very few LongiXorum chromosomes were transmitted from the BC1 triploid (LAA) plants to the BC2 progenies. The occurrence of diploid plants in the BC progenies of LA hybrids has opened the prospects of analytic breeding in lilies. In this approach, the selection of superior genotypes can be carried out at the diploid level and polyploid forms are synthesized from superior diploid parents. The advantages of analytic breeding are evident: (a) a maximum level of heterozygosity can be attained in the synthetic polyploids and (b) introgression can be achieved with a minimum of linkage drag. Based on GISH results the potential application of analytic breeding in lily allopolyploids has been discussed.

show abstract

“…In these genomes, natural selection and stochastic processes govern the genetic fate of each paralog-fates that include redundancy, subfunctionalization, neofunctionalization, and gene silencing (Ohno 1970;Hughes and Hughes 1993;Force et al 1999;Lynch and Force 2000;Lynch et al 2001;Gu 2003). After allopolyploidization, interactions between the subgenomes derived from each ancestral species included exchange of chromosome segments (Moscone et al 1996;Skalická et al 2005), concerted evolution (Wendel et al 1995;Volkov et al 1999), recombination (Zwierzykowski et al 1998), and epistasis ( Jiang et al 2000). Restructuring can then alter the stoichiometry of protein interactions by modifying regulatory elements or changing gene copy number.…”

mentioning

confidence: 99%

Ancestry Influences the Fate of Duplicated Genes Millions of Years After Polyploidization of Clawed Frogs (Xenopus)

Evans

2007

Genetics

View full text Add to dashboard Cite

Allopolyploid species form through the fusion of two differentiated genomes and, in the earliest stages of their evolution, essentially all genes in the nucleus are duplicated. Because unique mutations occur in each ancestor prior to allopolyploidization, duplicate genes in these species potentially are not interchangeable, and this could influence their genetic fates. This study explores evolution and expression of a simple duplicated complex-a heterodimer between RAG1 and RAG2 proteins in clawed frogs (Xenopus). Results demonstrate that copies of RAG1 degenerated in different polyploid species in a phylogenetically biased fashion, predominately in only one lineage of closely related paralogs. Surprisingly, as a result of an early deletion of one RAG2 paralog, it appears that in many species RAG1/RAG2 heterodimers are composed of proteins that were encoded by unlinked paralogs. If the tetraploid ancestor of extant species of Xenopus arose through allopolyploidization and if recombination between paralogs was rare, then the genes that encode functional RAG1 and RAG2 proteins in many polyploid species were each ultimately inherited from different diploid progenitors. These observations are consistent with the notion that ancestry can influence the fate of duplicate genes millions of years after duplication, and they uncover a dimension of natural selection in allopolyploid genomes that is distinct from other genetic phenomena associated with polyploidization or segmental duplication.

show abstract

Genome recombination in intergeneric hybrids between tetraploid Festuca pratensis and Lolium multiflorum

Cited by 79 publications

References 15 publications

A decade of “chromosome painting” in <i>Lolium</i> and <i>Festuca</i>

A decade of “chromosome painting” in <i>Lolium</i> and <i>Festuca</i>

Potential for analytic breeding in allopolyploids: an illustration from Longiflorum × Asiatic hybrid lilies (Lilium)

Ancestry Influences the Fate of Duplicated Genes Millions of Years After Polyploidization of Clawed Frogs (Xenopus)

Contact Info

Product

Resources

About