Central cell nuclear-cytoplasmic incongruity:a mechanism for segregation distortion in advanced backcross and selfed generations of (Allium cepa L. × Allium fistulosum L.) × A. cepa interspecific hybrid derivatives

2005 ◽  
Vol 109 (1-3) ◽  
pp. 400-407 ◽  
Author(s):  
P.D. Mangum ◽  
E.B. Peffley
HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1076a-1076
Author(s):  
Agnes RICROCH ◽  
Robert J. BAKER ◽  
Ellen B. PEFFLEY

Biotin- and fluorescein-labeled probe has been used to map. specific sunflower rDNA sequences by in situ hybridization on mitotic chromosomes of Allium cepa, Allium fistulosum and interspecific hybrid derivatives, There are three hybridization sites in A. cepa and more than six in an interspecific triploid. This in situ hybridization technique offers new cytogenetic markers useful in the construction of a physical genomic map of Allium and offer a means to document introgression of these genomes.


Euphytica ◽  
1991 ◽  
Vol 53 (3) ◽  
pp. 201-209 ◽  
Author(s):  
P. van der Valk ◽  
S. E. de Vries ◽  
J. T. Everink ◽  
F. Verstappen ◽  
J. N. de Vries

2020 ◽  
pp. 159-169
Author(s):  
Narel Y. Paniagua-Zambrana ◽  
Rainer W. Bussmann ◽  
Carolina Romero

2014 ◽  
Vol 62 (11) ◽  
pp. 1141-1145 ◽  
Author(s):  
Toshihiro Nohara ◽  
Yukio Fujiwara ◽  
Rino Kudo ◽  
Koki Yamaguchi ◽  
Tsuyoshi Ikeda ◽  
...  

Genome ◽  
2015 ◽  
Vol 58 (4) ◽  
pp. 135-142 ◽  
Author(s):  
Tadayuki Wako ◽  
Ken-ichiro Yamashita ◽  
Hikaru Tsukazaki ◽  
Takayoshi Ohara ◽  
Akio Kojima ◽  
...  

Bunching onion (Allium fistulosum L.; 2n = 16), bulb onion (Allium cepa L. Common onion group), and shallot (Allium cepa L. Aggregatum group) cultivars were inoculated with rust fungus, Puccinia allii, isolated from bunching onion. Bulb onions and shallots are highly resistant to rust, suggesting they would serve as useful resources for breeding rust resistant bunching onions. To identify the A. cepa chromosome(s) related to rust resistance, a complete set of eight A. fistulosum – shallot monosomic alien addition lines (MAALs) were inoculated with P. allii. At the seedling stage, FF+1A showed a high level of resistance in controlled-environment experiments, suggesting that the genes related to rust resistance could be located on shallot chromosome 1A. While MAAL, multi-chromosome addition line, and hypoallotriploid adult plants did not exhibit strong resistance to rust. In contrast to the high resistance of shallot, the addition line FF+1A+5A showed reproducibly high levels of rust resistance.


Genes ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 195 ◽  
Author(s):  
Natalia Kudryavtseva ◽  
Michael J. Havey ◽  
Lowell Black ◽  
Peter Hanson ◽  
Pavel Sokolov ◽  
...  

Interspecific crossing is a promising approach for introgression of valuable traits to develop cultivars with improved characteristics. Allium fistulosum L. possesses numerous pest resistances that are lacking in the bulb onion (Allium cepa L.), including resistance to Stemphylium leaf blight (SLB). Advanced generations were produced by selfing and backcrossing to bulb onions of interspecific hybrids between A. cepa and A. fistulosum that showed resistance to SLB. Molecular classification of the cytoplasm established that all generations possessed normal (N) male−fertile cytoplasm of bulb onions. Genomic in situ hybridization (GISH) was used to study the chromosomal composition of the advanced generations and showed that most plants were allotetraploids possessing the complete diploid sets of both parental species. Because artificial doubling of chromosomes of the interspecific hybrids was not used, spontaneous polyploidization likely resulted from restitution gametes or somatic doubling. Recombinant chromosomes between A. cepa and A. fistulosum were identified, revealing that introgression of disease resistances to bulb onion should be possible.


Genome ◽  
2002 ◽  
Vol 45 (2) ◽  
pp. 236-242 ◽  
Author(s):  
Eduard Chani ◽  
Varda Ashkenazi ◽  
Jossi Hillel ◽  
Richard E Veilleux

Segregation patterns of polymorphic simple sequence repeat (SSR) primer pairs were investigated in monoploid potato families derived from anther culture. A total of 14 primers developed from the sequences in the database, as well as from a genomic library of potato, was used. Distorted segregation was observed for seven (50%) polymorphic loci among monoploids derived from an interspecific hybrid. Similar distortion was observed for only one of five loci that could be contrasted between the two monoploid families. Segregation distortion was less common in the sexually derived backcross population between the interspecific hybrid and either of its parents. One locus could be putatively linked to a lethal allele because it showed distorted segregation in both monoploid families, a group of 70 heterozygous diploids derived from unreduced gametes through anther culture, and a backcross population. These diploids were used to map the polymorphic SSR markers with respect to the centromeres using half-tetrad analysis. The majority of the SSR loci mapped more than 33 cM from the centromere, suggesting the occurrence of a single crossover per chromosome arm.Key words: androgenesis, segregation distortion, simple sequence repeats (SSRs), Solanum phureja, unreduced gametes.


2020 ◽  
Vol 6 (11) ◽  
pp. 90411-90420
Author(s):  
Andréa Celina Ferreira Demartelaere ◽  
Welka Preston ◽  
Hailson Alves Ferreira Preston ◽  
Selma dos Santos Feitosa ◽  
Tadeu Barbosa Martins Silva ◽  
...  

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