scholarly journals Novel diploids following chromosome elimination and somatic recombination in Lolium multiflorum × Festuca arundinacea hybrids

Heredity ◽  
1997 ◽  
Vol 78 (5) ◽  
pp. 464-469 ◽  
Author(s):  
I Pašakinskienė ◽  
K Anamthawat-Jónsson ◽  
M W Humphreys ◽  
R N Jones
Keyword(s):  
Festuca Arundinacea ◽  
Lolium Multiflorum ◽  
Chromosome Elimination ◽  
Somatic Recombination

Novel diploids following chromosome elimination and somatic recombination in Lolium multiflorum×Festuca arundinacea hybrids

Heredity ◽  
1997 ◽  
Vol 78 (5) ◽  
pp. 464-469 ◽  
Author(s):  
I PAŠAKINSKIEN˙E ◽  
K ANAMTHAWAT-JÓNSSON ◽  
M W HUMPHREYS ◽  
R N JONESs
Keyword(s):  
Festuca Arundinacea ◽  
Lolium Multiflorum ◽  
Chromosome Elimination ◽  
Somatic Recombination

Stability at the phosphoglucoisomerase (PGI/2) locus in Lolium multiflorum (2n = 4x = 28) × Festuca arundinacea (2n = 6x = 42) plants regenerated from cell suspension

Genome ◽  
1992 ◽  
Vol 35 (3) ◽  
pp. 461-467 ◽  
Author(s):  
M. W. Humphreys ◽  
S. J. Dalton
Keyword(s):  
Cell Suspension ◽  
Festuca Arundinacea ◽  
Lolium Multiflorum ◽  
Chromosome Instability ◽  
Chromosome Loss ◽  
Somatic Recombination ◽  
Regenerated Plants ◽  
A Cell ◽  
Homoeologous Chromosomes ◽  
Culture Phase

Plants were regenerated from a cell suspension from shoot-tip derived callus of a pentaploid Lolium multiflorum (2n = 4x = 28) × Festuca arundinacea (2n = 6x = 42) in which a set of five homologous and homoeologous chromosomes were marked at the PGI/2 locus by distinct alleles. A direct relationship was found in regenerated plants between time in cell suspension and the number of aberrations at the PGI/2 locus. These included deletion of any one, and in a few cases two, of the five PGI/2 alleles, but these were not always related to chromosome loss. In addition three different PGI/2 alleles were each rendered null in some somaclones regenerated last from the cell suspension. While bivalent and trivalent frequency remained unaltered in the regenerated plants compared with the original hybrid, univalent frequency decreased. Chromosome configurations of four or more chromosomes, which probably represent intergeneric chromosome pairing, were significantly increased in the regenerated plants compared with the original hybrid and were negatively correlated with univalents. The possible incorporation of a cell culture phase as a way of increasing intergeneric recombination between L. multiflorum and F. arundinacea chromosomes in a conventional breeding program is discussed.Key words: Festuca–Lolium, somaclonal variation, phosphoglucoisomerase (PGI/2), chromosome instability, somatic recombination.

scholarly journals VARIATION AMONG PERENNIAL RYEGRASS x TALL FESCUE PLANTS FROM TISSUE CULTURE

1988 ◽  
pp. 81-86
Author(s):  
A.G. Scott ◽  
D.W.R. White
Keyword(s):  
Tissue Culture ◽  
Lolium Perenne ◽  
Perennial Ryegrass ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Chromosome Doubling ◽  
Chromosome Elimination ◽  
Intergeneric Hybrids ◽  
Hybrid Plants ◽  
Spontaneous Chromosome

Tissue culture was used in an attempt to obtain a fertile perennial ryegrass x tall fescue hybrid. Regenerated hybrid plants were found to be morphologically variable and contain extensive chromosome rearrangements. Spontaneous chromosome doubling had occurred as well as chromosome elimination. though no fertile hybrid plants have been obtained to date. Keywords: somaclonal variation, Lolium perenne, Festuca arundinacea, intergeneric hybrids

scholarly journals Introgression Mapping of Genes for Winter Hardiness and Frost Tolerance Transferred from Festuca arundinacea into Lolium multiflorum

2007 ◽  
Vol 98 (4) ◽  
pp. 311-316 ◽  
Author(s):  
A Kosmala ◽  
Z Zwierzykowski ◽  
E Zwierzykowska ◽  
M Luczak ◽  
M Rapacz ◽  
...  
Keyword(s):  
Festuca Arundinacea ◽  
Lolium Multiflorum ◽  
Frost Tolerance ◽  
Winter Hardiness

Genomic characteristics of a diploid F4 festulolium hybrid (Lolium multiflorum × Festuca arundinacea)

Genome ◽  
2012 ◽  
Vol 55 (8) ◽  
pp. 599-603 ◽  
Author(s):  
Yukio Akiyama ◽  
Kenji Kimura ◽  
Hitomi Yamada-Akiyama ◽  
Akito Kubota ◽  
Yoshinori Takahara ◽  
...  
Keyword(s):  
Festuca Arundinacea ◽  
Agronomic Traits ◽  
Genetic Relationships ◽  
Lolium Multiflorum ◽  
Summer Temperature ◽  
Chromosome Engineering ◽  
Chromosome Architecture ◽  
Potential Applications ◽  
High Ploidy ◽  
Heat Stress Tolerance

The grass festulolium, a hybrid between the genera Festuca and Lolium , has a variety of beneficial agronomic attributes derived from both parents. Compared with high-ploidy festulolium, diploid festulolium is well suited to stabilizing ploidy and for studying agronomic traits and genetic relationships. We sought to produce a diploid festulolium hybrid that was resistant to summer depression, by hybridizing diploid Lolium multiflorum Lam. and hexaploid Festuca arundinacea Schreb., which has a high tolerance to summer depression. We obtained seven diploid F4 plants that were capable of surviving the extremely hot summer in Morioka, Japan, in 2010, which was 2.7 °C higher than the average summer temperature. The observed resistance to summer depression in these plants was likely due to heat stress tolerance. The genomic constitutions of these seven hybrids were analyzed by GISH, and the chromosomal characteristics of a single diploid F4 was analyzed by FISH using rDNA probes. The results showed that although no Festuca-specific genome remained in any of the seven diploid F4 plants, extensive chromosomal rearrangement was observed in one of them. Our findings suggested that hybridizing diploid L. multiflorum and hexaploid F. arundinacea may be useful for modifying chromosome architecture in the Lolium genome with potential applications in chromosome engineering.

Resistance of Lolium multiflorum/Festuca arundinacea hybrids to some diseases of their parent species

Euphytica ◽  
1974 ◽  
Vol 23 (2) ◽  
pp. 315-320 ◽  
Author(s):  
P. W. Wilkins ◽  
A. J. H. Carr ◽  
E. J. Lewis
Keyword(s):  
Festuca Arundinacea ◽  
Lolium Multiflorum ◽  
Parent Species
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