Integration of the classical and RFLP linkage maps of the short arm of tomato chromosome 1

1995 ◽  
Vol 90 (1) ◽  
pp. 17-26 ◽  
Author(s):  
P. J. Balint-Kurti ◽  
D. A. Jones ◽  
J. D. G. Jones
Keyword(s):  
Chromosome 1 ◽  
Linkage Maps ◽  
Tomato Chromosome ◽  
Tomato Chromosome 1

Tomato chromosome 1: high resolution genetic and physical mapping of the short arm in an interspecific Lycopersicon esculentum×L. peruvianum cross

1997 ◽  
Vol 253 (4) ◽  
pp. 455-462 ◽  
Author(s):  
G. Bonnema ◽  
D. Schipper ◽  
S. van Heusden ◽  
P. Lindhout ◽  
P. Zabel
Keyword(s):  
High Resolution ◽  
Lycopersicon Esculentum ◽  
Physical Mapping ◽  
Chromosome 1 ◽  
Genetic And Physical Mapping ◽  
Tomato Chromosome ◽  
Tomato Chromosome 1

scholarly journals Integration of Cytogenetic and Genetic Linkage Maps Unveils the Physical Architecture of Tomato Chromosome 2

Genetics ◽  
2008 ◽  
Vol 179 (3) ◽  
pp. 1211-1220 ◽  
Author(s):  
Dal-Hoe Koo ◽  
Sung-Hwan Jo ◽  
Jae-Wook Bang ◽  
Hye-Mi Park ◽  
Sanghyeob Lee ◽  
...  
Keyword(s):  
Genetic Linkage ◽  
Chromosome 2 ◽  
Linkage Maps ◽  
Tomato Chromosome ◽  
Genetic Linkage Maps

Re-orientation and integration of the classical and interspecific linkage maps of the long arm of tomato chromosome 7

2001 ◽  
Vol 103 (2-3) ◽  
pp. 443-454 ◽  
Author(s):  
A. Burbidge ◽  
P. Lindhout ◽  
T. M. Grieve ◽  
K. Schumacher ◽  
K. Theres ◽  
...  
Keyword(s):  
Chromosome 7 ◽  
Linkage Maps ◽  
Tomato Chromosome

scholarly journals Molecular-genetic maps for group 1 chromosomes of Triticeae species and their relation to chromosomes in rice and oat

Genome ◽  
1995 ◽  
Vol 38 (1) ◽  
pp. 45-59 ◽  
Author(s):  
A. E. Van Deynze ◽  
J. Dubcovsky ◽  
K. S. Gill ◽  
J. C. Nelson ◽  
M. E. Sorrells ◽  
...  
Keyword(s):  
Dna Markers ◽  
Molecular Genetic ◽  
Genetic Maps ◽  
Chromosome 1 ◽  
Linkage Maps ◽  
Consensus Map ◽  
Triticeae Species ◽  
Group 1 Chromosomes ◽  
Homoeologous Chromosomes ◽  
Group 1

Group 1 chromosomes of the Triticeae tribe have been studied extensively because many important genes have been assigned to them. In this paper, chromosome 1 linkage maps of Triticum aestivum, T. tauschii, and T. monococcum are compared with existing barley and rye maps to develop a consensus map for Triticeae species and thus facilitate the mapping of agronomic genes in this tribe. The consensus map that was developed consists of 14 agronomically important genes, 17 DNA markers that were derived from known-function clones, and 76 DNA markers derived from anonymous clones. There are 12 inconsistencies in the order of markers among seven wheat, four barley, and two rye maps. A comparison of the Triticeae group 1 chromosome consensus map with linkage maps of homoeologous chromosomes in rice indicates that the linkage maps for the long arm and the proximal portion of the short arm of group 1 chromosomes are conserved among these species. Similarly, gene order is conserved between Triticeae chromosome 1 and its homoeologous chromosome in oat. The location of the centromere in rice and oat chromosomes is estimated from its position in homoeologous group 1 chromosomes of Triticeae.Key words: Triticeae, RFLP, consensus, comparative.

Prospects for introgressing tomato chromosomes into the potato genome: An assessment through GISH analysis

Genome ◽  
1999 ◽  
Vol 42 (2) ◽  
pp. 282-288 ◽  
Author(s):  
F Garriga-Calderé ◽  
D J Huigen ◽  
E Jacobsen ◽  
M S Ramanna
Keyword(s):  
Low Frequency ◽  
Chromosome 8 ◽  
Chromosome 1 ◽  
Crossing Over ◽  
Homoeologous Pairing ◽  
Potato Genome ◽  
Somatic Fusion ◽  
Tomato Chromosome ◽  
Genomic In Situ Hybridisation ◽  
Monosomic Addition

With a view to assess the possibility of homoeologous pairing and crossing-over between the chromosomes of potato (Solanum tuberosum) and tomato (Lycopersicon esculentum), a somatic fusion hybrid and two monosomic alien tomato addition genotypes were investigated through genomic in situ hybridisation (GISH). The somatic fusion hybrid, C31-17-51, was near hexaploid (2n = 6x - 4 = 68) possessing 46 potato chromosomes + 20 tomato chromosomes + 2 translocated chromosomes. The two alien addition genotypes were near tetraploids (2n = 4x + 1 = 49) and consisted of monosomic alien additions for tomato chromosome 1 in genotype 2103-1, and tomato chromosome 8 in genotype 2301-2. In the fusion hybrid the tomato pachytene chromosome identification revealed that the chromosomes 1, 2, 5, 6, 7, 10, and 12 were in diploid condition whereas among those that were in haploid condition, three could be identified viz., 4, 9, and 11. The remaining three chromosomes could not be cytologically identified. Although the chromosomes with translocated segments could not be identified at the pachytene stage due to technical difficulties, there was clear evidence for the presence of a reciprocal translocation observed at diakinesis and metaphase I stages. Because of autosyndetic pairing of the translocated segments, it gave a false impression as if there was a high frequency (86.0%) of allosyndetic pairing. In contrast to the fusion hybrid, the two alien monosomic addition genotypes showed a very low frequency of allosyndetic pairing, namely 1.1 and 1.3% respectively for the monosomic additions 1 and 8. In the genotype 2301-2, monosomic addition for tomato chromosome 8, crossing-over between the homoeologous chromosomes was estimated to occur in 0.8% of the meiotic cells investigated. Despite this low frequency of homoeologous pairing and crossing-over, there is a possibility for introgressing tomato chromosomal DNA into the potato genome through intergenomic recombination.Key words: Solanum, Lycopersicon, chromosome additions, GISH, introgression.

scholarly journals Quantitative trait loci (QTL) analysis of leaf related traits in spinach (Spinacia oleracea L.)

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Zhiyuan Liu ◽  
Hongbing She ◽  
Zhaosheng Xu ◽  
Helong Zhang ◽  
Guoliang Li ◽  
...  
Keyword(s):  
Qtl Mapping ◽  
Spinacia Oleracea ◽  
Snp Markers ◽  
Leaf Length ◽  
Chromosome 1 ◽  
Leaf Width ◽  
Linkage Maps ◽  
Petiole Length ◽  
Phosphodiester Bond ◽  
Major Qtls

Abstract Background Spinach (Spinacia oleracea L.) is an important leafy vegetable crop, and leaf-related traits including leaf length, leaf width, and petiole length, are important commercial traits. However, the underlying genes remain unclear. The objective of the study was to conduct QTL mapping of leaf-related traits in spinach. Results A BC1 population was used to construct the linkage map and for QTL mapping of leaf length, leaf width, petiole length, and the ratio of leaf length to width in 2015 and 2019. Two genetic linkage maps were constructed by specific locus amplified fragment sequencing (SLAF-seq), and kompetitive allele specific PCR (KASP) technology, respectively using BC1 population in 2015. Based on the results of 2015, the specific linkage groups (LG) detected QTLs were generated using BC1 population in 2019. A total of 13 QTLs were detected for leaf-related traits, only five QTLs being repeatedly detected in multiple years or linkage maps. Interestingly, the major QTLs of leaf length, petiole length, and the ratio of leaf length to width were highly associated with the same SNP markers (KM3102838, KM1360385 and KM2191098). A major QTL of leaf width was mapped on chromosome 1 from 41.470−42.045 Mb. And 44 genes were identified within the region. Based on the GO analysis, these genes were significantly enriched on ribonuclease, lyase activity, phosphodiester bond hydrolysis process, and cell wall component, thus it might change cell size to determine leaves shape. Conclusions Five QTLs for leaf-related traits were repeatedly detected at least two years or linkage maps. The major QTLs of leaf length, petiole length, and the ratio of leaf length to width were mapped on the same loci. And three genes (Spo10792, Spo21018, and Spo21019) were identified as important candidate genes for leaf width.

Marker-assisted identification of potential fertility restorers for the development of three-line hybrids in rice (Oryza sativa L.)

2020 ◽  
Vol 57 (3) ◽  
pp. 181-189
Author(s):  
Asma Majid ◽  
GA Parray ◽  
NR Sofi ◽  
Gazala H Khan ◽  
Showkat A Waza ◽  
...  
Keyword(s):  
Oryza Sativa L ◽  
Chromosome 1 ◽  
Limiting Factor ◽  
Kashmir Valley ◽  
Fertility Restorer ◽  
Yield And Quality ◽  
Restorer Genes ◽  
Increase Productivity ◽  
Fertility Restorers ◽  
Selection Of

Rice being a staple food crop of Kashmir valley, the focus is on enhancement of yield in order to meet the needs of ever-growing population.Identification of new parental lines is crucial for developing ecology-specific hybrids with ideal agronomic performance. Exploitation of heterosis in the form of hybrid rice technology can be one of the approaches to increase productivity in this crop, especially exploiting diversity among japonica lines can serve as an excellent route.A number of CMS lines suitable formountainous areas of Kashmir have been developed, however, the availability of promising restorer lines remains to be the major limitation for utilization of these lines.Identification of potential restorers acts as the main limiting factor for hybrid development in the Kashmir valley. Marker based screening for Rf3 and Rf4 fertility restorer genes can be helpful in rapid selection of restorer lines while dealing with the large quantity of genetic materials. In the present study, 100 rice germplasm were screened with the help of SSR markers, RM3148 and RM6100linked to Rf3 and Rf4 genes on chromosome 1 and 10, respectively. In total, 19 lines revealed the presence of both Rf3 and Rf4 genes. These lines amplified fertility restorer specific alleles for both the genes and may serve as potential restorers for obtaining heterotic rice hybrids. Further the germplasm lines were also evaluated for yield and quality traits.The present results would help in selection of suitable restorers along with preferred grain shape/size.

Construction of genetic linkage maps of silver birch based on AFLP markers

2009 ◽  
Vol 31 (2) ◽  
pp. 213-218 ◽  
Author(s):  
Fu-Ling GAO ◽  
Ting-Bo JIANG
Keyword(s):  
Genetic Linkage ◽  
Silver Birch ◽  
Aflp Markers ◽  
Linkage Maps ◽  
Genetic Linkage Maps

scholarly journals Isolation and Characterization Of Rice R Genes: Evidence for Distinct Evolutionary Paths in Rice and Maize

Genetics ◽  
1996 ◽  
Vol 142 (3) ◽  
pp. 1021-1031 ◽  
Author(s):  
Jianping Hu ◽  
Beth Anderson ◽  
Susan R Wessler
Keyword(s):  
Gene Family ◽  
Gene Families ◽  
Chromosome 1 ◽  
R Gene ◽  
R Genes ◽  
Helix Loop Helix ◽  
Isolation And Characterization ◽  
Undetermined Function ◽  
Evolutionary Paths

Abstract R and B genes and their homologues encode basic helix-loop-helix (bHLH) transcriptional activators that regulate the anthocyanin biosynthetic pathway in flowering plants. In maize, R/B genes comprise a very small gene family whose organization reflects the unique evolutionary history and genome architecture of maize. To know whether the organization of the R gene family could provide information about the origins of the distantly related grass rice, we characterized members of the R gene family from rice Oryza sativa. Despite being a true diploid, O. sativa has at least two R genes. An active homologue (Ra) with extensive homology with other R genes is located at a position on chromosome 4 previously shown to be in synteny with regions of maize chromosomes 2 and 10 that contain the B and R loci, respectively. A second rice R gene (Rb) of undetermined function was identified on chromosome 1 and found to be present only in rice species with AA genomes. All non-AA species have but one R gene that is Ra-like. These data suggest that the common ancestor shared by maize and rice had a single R gene and that the small R gene families of grasses have arisen recently and independently.

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