An expanded genetic linkage map of Prunus based on an interspecific cross between almond and peach

Genome ◽  
2002 ◽  
Vol 45 (3) ◽  
pp. 520-529 ◽  
Author(s):  
F A Bliss ◽  
S Arulsekar ◽  
M R Foolad ◽  
V Becerra ◽  
A M Gillen ◽  
...  
Keyword(s):  
Linkage Group ◽  
Linkage Map ◽  
Resistance Gene ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Group Identification ◽  
Resistance Gene Analogs ◽  
Linkage Groups ◽  
Genomic Clones ◽  
Trait Loci

The genetic linkage map of Prunus constructed earlier and based on an interspecific F2 population resulting from a cross between almond (Prunus dulcis D.A. Webb) and peach (Prunus persica L. Batsch) was extended to include 8 isozyme loci, 102 peach mesocarp cDNAs, 11 plum genomic clones, 19 almond genomic clones, 7 resistance gene analogs (RGAs), 1 RGA-related sequence marker, 4 morphological trait loci, 3 genes with known function, 4 simple sequence repeat (SSR) loci, 1 RAPD, and 1 cleaved amplified polymorphic sequence (CAP) marker. This map contains 161 markers placed in eight linkage groups that correspond to the basic chromosome number of the genus (x = n = 8) with a map distance of 1144 centimorgans (cM) and an average marker density of 6.8 cM. Four more trait loci (Y, Pcp, D, and SK) and one isozyme locus (Mdh1) were assigned to linkage groups based on known associations with linked markers. The linkage group identification numbers correspond to those for maps published by the Arús group in Spain and the Dirlewanger group in France. Forty-five percent of the loci showed segregation distortion most likely owing to the interspecific nature of the cross and mating system differences between almond (obligate outcrosser) and peach (selfer). The Cat1 locus, known to be linked to the D locus controlling fruit acidity, was mapped to linkage group 5. A gene or genes controlling polycarpel fruit development was placed on linkage group 3, and control of senesced leaf color (in late fall season) (LFCLR) was mapped to linkage group 1 at a putative location similar to where the Y locus has also been placed.Key words: Prunus, molecular markers, RFLPs, resistance gene analogs (RGAs), polycarpel fruit, stone fruits.

Mapping of quantitative trait loci underlying resistance to cassava anthracnose disease

2015 ◽  
Vol 154 (7) ◽  
pp. 1209-1217 ◽  
Author(s):  
A. BOONCHANAWIWAT ◽  
S. SRAPHET ◽  
S. WHANKAEW ◽  
O. BOONSENG ◽  
D. R. SMITH ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Linkage Map ◽  
Dna Markers ◽  
Quantitative Trait ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Gene Annotation ◽  
Linkage Groups ◽  
Anthracnose Disease ◽  
Trait Loci

SUMMARYCassava (Manihot esculenta Crantz) is an economically important root crop in Thailand, which is ranked the world's top cassava exporting country. Production of cassava can be hampered by several pathogens and pests. Cassava anthracnose disease (CAD) is an important disease caused by the fungus Colletotrichum gloeosporioides f. sp. manihotis. The pathogen causes severe stem damage resulting in yield reductions and lack of stem cuttings available for planting. Molecular studies of cassava response to CAD will provide useful information for cassava breeders to develop new varieties with resistance to the disease. The current study aimed to identify quantitative trait loci (QTL) and DNA markers associated with resistance to CAD. A total of 200 lines of two F1 mapping populations were generated by reciprocal crosses between the varieties Huabong60 and Hanatee. The F1 samples were genotyped based on simple sequence repeat (SSR) and expressed sequence tag-SSR markers and a genetic linkage map was constructed using the JoinMap®/version3·0 program. The results showed that the map consisted of 512 marker loci distributed on 24 linkage groups with a map length of 1771·9 centimorgan (cM) and a mean interval between markers of 5·7 cM. The genetic linkage map was integrated with phenotypic data for the response to CAD infection generated by a detached leaf assay test. A total of three QTL underlying the trait were identified on three linkage groups using the MapQTL®/version4·0 program. Those DNA markers linked to the QTL that showed high statistically significant values with the CAD resistance trait were identified for gene annotation analysis and 23 candidate resistance genes to CAD infection were identified.

A genetic linkage map of tetraploid orchardgrass (Dactylis glomerata L.) and quantitative trait loci for heading date

Genome ◽  
2012 ◽  
Vol 55 (5) ◽  
pp. 360-369 ◽  
Author(s):  
Wengang Xie ◽  
Joseph G. Robins ◽  
B. Shaun Bushman
Keyword(s):  
Quantitative Trait Loci ◽  
Linkage Map ◽  
Quantitative Trait ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Heading Date ◽  
Dactylis Glomerata ◽  
Linkage Groups ◽  
Trait Loci ◽  
Dactylis Glomerata L

Orchardgrass ( Dactylis glomerata L.), or cocksfoot, is indigenous to Eurasia and northern Africa, but has been naturalized on nearly every continent and is one of the top perennial forage grasses grown worldwide. To improve the understanding of genetic architecture of orchardgrass and provide a template for heading date candidate gene search in this species, the goals of the present study were to construct a tetraploid orchardgrass genetic linkage map and identify quantitative trait loci associated with heading date. A combination of SSR markers derived from an orchardgrass EST library and AFLP markers were used to genotype an F1 population of 284 individuals derived from a very late heading Dactylis glomerata subsp. himalayensis parent and an early to mid-heading Dactylis glomerata subsp. aschersoniana parent. Two parental maps were constructed with 28 cosegregation groups and seven consensus linkage groups each, and homologous linkage groups were tied together by 38 bridging markers. Linkage group lengths varied from 98 to 187 cM, with an average distance between markers of 5.5 cM. All but two mapped SSR markers had homologies to physically mapped rice (Oryza sativa L.) genes, and six of the seven orchardgrass linkage groups were assigned based on this putative synteny with rice. Quantitative trait loci were detected for heading date on linkage groups 2, 5, and 6 in both parental maps, explaining between 12% and 24% of the variation.

scholarly journals A Molecular Genetic Linkage Map of Eucommia ulmoides and Quantitative Trait Loci (QTL) Analysis for Growth Traits

2014 ◽  
Vol 15 (2) ◽  
pp. 2053-2074 ◽  
Author(s):  
Yu Li ◽  
Dawei Wang ◽  
Zhouqi Li ◽  
Junkun Wei ◽  
Cangfu Jin ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Linkage Map ◽  
Qtl Analysis ◽  
Quantitative Trait ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Growth Traits ◽  
Molecular Genetic ◽  
Eucommia Ulmoides ◽  
Trait Loci

Genetic linkage map construction and quantitative trait loci mapping of agronomic traits in Gloeostereum incarnatum

2020 ◽  
Vol 59 (1) ◽  
pp. 41-50
Author(s):  
Wan-Zhu Jiang ◽  
Fang-Jie Yao ◽  
Li-Xin Lu ◽  
Ming Fang ◽  
Peng Wang ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Linkage Map ◽  
Quantitative Trait ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Agronomic Traits ◽  
Quantitative Trait Loci Mapping ◽  
Map Construction ◽  
Trait Loci

scholarly journals Genetic Linkage Map of the Edible BasidiomycetePleurotus ostreatus

2000 ◽  
Vol 66 (12) ◽  
pp. 5290-5300 ◽  
Author(s):  
Luis M. Larraya ◽  
G�mer P�rez ◽  
Enrique Ritter ◽  
Antonio G. Pisabarro ◽  
Lucı́a Ramı́rez
Keyword(s):  
Linkage Map ◽  
Genetic Linkage ◽  
Gene Sequence ◽  
Genetic Linkage Map ◽  
Fragment Length Polymorphism ◽  
Individual Cell ◽  
Random Amplified Polymorphic Dna ◽  
Rrna Gene ◽  
Linkage Groups ◽  
Rrna Gene Sequence

ABSTRACT We have constructed a genetic linkage map of the edible basidiomycete Pleurotus ostreatus (var. Florida). The map is based on the segregation of 178 random amplified polymorphic DNA and 23 restriction fragment length polymorphism markers; four hydrophobin, two laccase, and two manganese peroxidase genes; both mating type loci; one isozyme locus (est1); the rRNA gene sequence; and a repetitive DNA sequence in a population of 80 sibling monokaryons. The map identifies 11 linkage groups corresponding to the chromosomes ofP. ostreatus, and it has a total length of 1,000.7 centimorgans (cM) with an average of 35.1 kbp/cM. The map shows a high correlation (0.76) between physical and genetic chromosome sizes. The number of crossovers observed per chromosome per individual cell is 0.89. This map covers nearly the whole genome of P. ostreatus.

scholarly journals Construction of genetic linkage map with chromosomal assigment and quantitative trait loci associated with some important agronomic traits in cotton

2013 ◽  
Vol 4 (1) ◽  
pp. 36-49 ◽  
Author(s):  
Sami S. Adawy ◽  
Ayman A. Diab ◽  
Mohamed A.M. Atia ◽  
Ebtissam H.A. Hussein
Keyword(s):  
Quantitative Trait Loci ◽  
Linkage Map ◽  
Quantitative Trait ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Agronomic Traits ◽  
Trait Loci

Theobroma cacao L.: a genetic linkage map and quantitative trait loci analysis

1996 ◽  
Vol 93 (1-2) ◽  
pp. 205-214 ◽  
Author(s):  
D. Crouzillat ◽  
E. Lerceteau ◽  
V. Petiard ◽  
J. Morera ◽  
H. Rodriguez ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Linkage Map ◽  
Quantitative Trait ◽  
Theobroma Cacao ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Trait Loci ◽  
Theobroma Cacao L

A genetic linkage map for Stevia rebaudiana

Genome ◽  
1999 ◽  
Vol 42 (4) ◽  
pp. 657-661 ◽  
Author(s):  
Y Yao ◽  
M Ban ◽  
J Brandle
Keyword(s):  
Linkage Map ◽  
Genetic Linkage ◽  
Rapd Markers ◽  
Genetic Linkage Map ◽  
Average Distance ◽  
Stevia Rebaudiana ◽  
Linkage Groups ◽  
Genome Map ◽  
High Level ◽  
Map Distance

To lay a foundation for molecular breeding efforts, the first genetic linkage map for Stevia rebaudiana has been constructed using segregation data from a pseudo test-cross F1 population. A total of 183 randomly amplified polymorphic DNA (RAPD) markers were analysed and assembled into 21 linkage groups covering a total distance of 1389 cM, with an average distance between markers of of 7.6 cM. The 11 largest linkage groups consisted of 4-19 loci, ranged in length from 56 to 174 cM, and accounted for 75% of the total map distance. Fifteen RAPD loci were found to be unlinked. From the 521 primers showing amplification products, 185 (35.5%) produced a total of 293 polymorphic fragments, indicating a high level of genetic diversity in stevia. Most of the RAPD markers in stevia segregated in normal Mendelian fashion.Key words: stevia, open-pollinated, genome map, RAPD.

scholarly journals Single linkage group per chromosome genetic linkage map for the horse, based on two three-generation, full-sibling, crossbred horse reference families

Genomics ◽  
2006 ◽  
Vol 87 (1) ◽  
pp. 1-29 ◽  
Author(s):  
June E. Swinburne ◽  
Mike Boursnell ◽  
Gemma Hill ◽  
Louise Pettitt ◽  
Twink Allen ◽  
...  
Keyword(s):  
Linkage Group ◽  
Linkage Map ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Single Linkage ◽  
Full Sibling

scholarly journals Development of a genetic linkage map for Sharon goatgrass (Aegilops sharonensis) and mapping of a leaf rust resistance gene

Genome ◽  
2013 ◽  
Vol 56 (7) ◽  
pp. 367-376 ◽  
Author(s):  
P.D. Olivera ◽  
A. Kilian ◽  
P. Wenzl ◽  
B.J. Steffenson
Keyword(s):  
Linkage Map ◽  
Leaf Rust ◽  
Resistance Genes ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Chromosomal Location ◽  
Dominant Gene ◽  
Leaf Rust Resistance Gene ◽  
Linkage Groups ◽  
Aegilops Sharonensis

Aegilops sharonensis (Sharon goatgrass), a diploid wheat relative, is known to be a rich source of disease resistance genes for wheat improvement. To facilitate the transfer of these genes into wheat, information on their chromosomal location is important. A genetic linkage map of Ae. sharonensis was constructed based on 179 F2 plants derived from a cross between accessions resistant (1644) and susceptible (1193) to wheat leaf rust. The linkage map was based on 389 markers (377 Diversity Arrays Technology (DArT) and 12 simple sequence repeat (SSR) loci) and was comprised of 10 linkage groups, ranging from 2.3 to 124.6 cM. The total genetic length of the map was 818.0 cM, with an average interval distance between markers of 3.63 cM. Based on the chromosomal location of 115 markers previously mapped in wheat, the four linkage groups of A, B, C, and E were assigned to Ae. sharonensis (Ssh) and homoeologous wheat chromosomes 6, 1, 3, and 2. The single dominant gene (designated LrAeSh1644) conferring resistance to leaf rust race THBJ in accession 1644 was positioned on linkage group A (chromosome 6Ssh) and was flanked by DArT markers wpt-9881 (at 1.9 cM distal from the gene) and wpt-6925 (4.5 cM proximal). This study clearly demonstrates the utility of DArT for genotyping uncharacterized species and tagging resistance genes where pertinent genomic information is lacking.

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