Barriers to hybridization of Solanum bulbocastanum Dun. and S. Verrucosum Schlechtd. and structural hybridity in their F1 plants

Euphytica ◽  
1976 ◽  
Vol 25 (1) ◽  
pp. 1-10 ◽  
Author(s):  
J. G. Th. Hermsen ◽  
M. S. Ramanna
Keyword(s):  
Solanum Bulbocastanum ◽  
Structural Hybridity

scholarly journals A DArT marker-based linkage map for wild potato Solanum bulbocastanum facilitates structural comparisons between SolanumA and B genomes

BMC Genetics ◽  
2014 ◽  
Vol 15 (1) ◽  
Author(s):  
Massimo Iorizzo ◽  
Liangliang Gao ◽  
Harpartap Mann ◽  
Alessandra Traini ◽  
Maria Luisa Chiusano ◽  
...  
Keyword(s):  
Linkage Map ◽  
Dart Marker ◽  
Wild Potato ◽  
Solanum Bulbocastanum

Structural hybridity in a diploid taraxacum

1961 ◽  
Vol 48 (4) ◽  
pp. 109-110 ◽  
Author(s):  
Arun Kumar Sharma ◽  
Tapati Chatterjee
Keyword(s):  
Structural Hybridity

Double-bridge hybrids of Solanum bulbocastanum and cultivars of Solanum tuberosum

Euphytica ◽  
1973 ◽  
Vol 22 (3) ◽  
pp. 457-466 ◽  
Author(s):  
J. G. TH. Hermsen ◽  
M. S. Ramanna
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Bulbocastanum

Highly Condensed Potato Pericentromeric Heterochromatin Contains rDNA-Related Tandem Repeats

Genetics ◽  
2002 ◽  
Vol 162 (3) ◽  
pp. 1435-1444 ◽  
Author(s):  
Robert M Stupar ◽  
Junqi Song ◽  
Ahmet L Tek ◽  
Zhukuan Cheng ◽  
Fenggao Dong ◽  
...  
Keyword(s):  
Repetitive Dna ◽  
Dna Sequences ◽  
Tandem Repeats ◽  
Intergenic Spacer ◽  
Pericentromeric Heterochromatin ◽  
Dna Repeats ◽  
Solanum Bulbocastanum ◽  
Origin And Evolution ◽  
Potato Genome ◽  
Dna Elements

Abstract The heterochromatin in eukaryotic genomes represents gene-poor regions and contains highly repetitive DNA sequences. The origin and evolution of DNA sequences in the heterochromatic regions are poorly understood. Here we report a unique class of pericentromeric heterochromatin consisting of DNA sequences highly homologous to the intergenic spacer (IGS) of the 18S•25S ribosomal RNA genes in potato. A 5.9-kb tandem repeat, named 2D8, was isolated from a diploid potato species Solanum bulbocastanum. Sequence analysis indicates that the 2D8 repeat is related to the IGS of potato rDNA. This repeat is associated with highly condensed pericentromeric heterochromatin at several hemizygous loci. The 2D8 repeat is highly variable in structure and copy number throughout the Solanum genus, suggesting that it is evolutionarily dynamic. Additional IGS-related repetitive DNA elements were also identified in the potato genome. The possible mechanism of the origin and evolution of the IGS-related repeats is discussed. We demonstrate that potato serves as an interesting model for studying repetitive DNA families because it is propagated vegetatively, thus minimizing the meiotic mechanisms that can remove novel DNA repeats.

scholarly journals Independent Resistant Reactions Expressed in Root and Tuber of Potato Breeding Lines with Introgressed Resistance to Meloidogyne chitwoodi

2009 ◽  
Vol 99 (9) ◽  
pp. 1085-1089 ◽  
Author(s):  
C. R. Brown ◽  
H. Mojtahedi ◽  
L.-H. Zhang ◽  
E. Riga
Keyword(s):  
Genetic Factors ◽  
Dominant Gene ◽  
Breeding Line ◽  
Single Dominant Gene ◽  
Solanum Bulbocastanum ◽  
Chromosome 11 ◽  
Meloidogyne Chitwoodi ◽  
Tuber Resistance ◽  
Advanced Backcross ◽  
Resistance Breaking

Resistance to Meloidogyne chitwoodi was introgressed from Solanum bulbocastanum into the cultivated gene pool of potato. A single dominant gene is responsible for resistance to race 1 reproduction on the root system. An additional form of resistance was discovered in certain advanced backcross clones. A BC5 clone, PA99N82-4, resisted invasion of tubers by available nematode juveniles whether supplied by weeds or challenged by several root resistance-breaking pathotypes. This tuber resistance is inherited as a single dominant gene and is linked to RMc1(blb). Because this gene has been mapped to chromosome 11, tuber resistance genetic factors are inferred to be on the same chromosome in coupling phase. Among 153 progeny derived from crosses with PA99N82-4, 42 recombinants, comprising both resistant root/susceptible tuber and susceptible root/resistant tubers, were found while other progeny were doubly resistant (like PA99N82-4) or doubly susceptible. Therefore, the existence of two linked genetic factors controlling independently expressed traits is confirmed. The combination of the two phenotypes is likely to be a sufficient level of resistance to avoid tuber damage from circumstances that provide exogenous juveniles proximal to the tubers in the soil. These factors are weed hosts of M. chitwoodi host races and pathotypes of M. chitwoodi that overcome RMc1(blb). Under field conditions, where a resistance-breaking pathotype of M. chitwoodi was present, tuber-resistant PA99N82-4 breeding line produced tubers which were commercially acceptable and not culled. A related breeding line, root resistant but tuber susceptible, and Russet Burbank were severely tuber damaged and commercially unacceptable.

Structural hybridity and supernumerary chromosomes in a diploid Tradescantia hirsuticaulis

1975 ◽  
Vol 53 (5) ◽  
pp. 456-465 ◽  
Author(s):  
C. C. Chinnappa
Keyword(s):  
Reciprocal Translocation ◽  
Cytological Study ◽  
B Chromosomes ◽  
The Other ◽  
Meiotic Pairing ◽  
Structural Hybridity ◽  
Supernumerary Chromosomes

Cytological study of a diploid (2n = 12) population of Tradescantia hirsuticaulis Small from Stone Mountain, Georgia, revealed striking variation in four plants growing in a cluster, indicating that they constitute different genotypes. The occurrence of B chromosomes, fragments, and aneusomaty in the plants is associated with structural hybridity in the chromosomes. Two plants were homozygotes with simple meiotic pairing, one was heterozygous for a reciprocal translocation, and the other was a heterozygote for two interchanges as well as for inversions. The behavior and the origin of B chromosomes, fragments, and structural hybridity are discussed.

scholarly journals Correction to: Transcriptome profiling of resistance response to Meloidogyne chitwoodi introgressed from wild species Solanum bulbocastanum into cultivated potato

BMC Genomics ◽  
2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Sapinder Bali ◽  
Kelly Vining ◽  
Cynthia Gleason ◽  
Hassan Majtahedi ◽  
Charles R. Brown ◽  
...  
Keyword(s):  
Wild Species ◽  
Transcriptome Profiling ◽  
Solanum Bulbocastanum ◽  
Resistance Response ◽  
Meloidogyne Chitwoodi ◽  
Cultivated Potato

Following the publication of this article [1], the authors noted an error in Figure 11.

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