scholarly journals Multiple Disease Resistance Loci Affect Soilborne Disease Resistance in Tobacco (Nicotiana tabacum)

2017 ◽  
Vol 107 (9) ◽  
pp. 1055-1061 ◽  
Author(s):  
Katherine Drake-Stowe ◽  
Nicolas Bakaher ◽  
Simon Goepfert ◽  
Berangere Philippon ◽  
Regis Mark ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Dna Markers ◽  
Phytophthora Nicotianae ◽  
Soilborne Pathogens ◽  
High Positive Correlation ◽  
Soilborne Disease ◽  
Breeding Populations ◽  
Multiple Disease Resistance ◽  
Phytophthora Resistance ◽  
Genomic Regions

Phytophthora nicotianae and Ralstonia solanacearum are two of the most important pathogens affecting tobacco worldwide. Greater insight regarding genetic systems controlling resistance to these two soilborne pathogens, as well as identification of DNA markers associated with genomic regions controlling this resistance, could aid in variety development. An evaluation of 50 historical tobacco lines revealed a high positive correlation between resistances to the two pathogens, preliminarily suggesting that some genomic regions may confer resistance to both pathogens. A quantitative trait loci (QTL) mapping experiment designed to investigate the genetic control of soilborne disease resistance of highly resistant ‘K346’ tobacco identified four QTL significantly associated with resistance to P. nicotianae (explaining 60.0% of the observed phenotypic variation) and three QTL to be associated with R. solanacearum resistance (explaining 50.3% of the observed variation). The two QTL with the largest effect on Phytophthora resistance were also found to be the QTL with the greatest effects on resistance to Ralstonia. This finding partially explains previously observed associations between resistances to these two pathogens among U.S. current cultivars and within breeding populations. Further study is needed to determine whether these relationships are due to the same genes (i.e., pleiotropy) or favorable coupling-phase linkages that have been established over time.

209 Prospecting genomic regions associated with columnaris disease in two rainbow trout breeding populations

2017 ◽  
Vol 95 (suppl_4) ◽  
pp. 103-104
Author(s):  
R. M. O. Silva ◽  
R. L. Vallejo ◽  
J. P. Evenhuis ◽  
T. D. Leeds ◽  
G. Gao ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Breeding Populations ◽  
Columnaris Disease ◽  
Genomic Regions

scholarly journals Comparative analysis of multiple disease resistance in ryegrass and cereal crops

2008 ◽  
Vol 117 (4) ◽  
pp. 531-543 ◽  
Author(s):  
Young-Ki Jo ◽  
Reed Barker ◽  
William Pfender ◽  
Scott Warnke ◽  
Sung-Chur Sim ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Comparative Analysis ◽  
Cereal Crops ◽  
Multiple Disease Resistance

Use of a Maize Advanced Intercross Line for Mapping of QTL for Northern Leaf Blight Resistance and Multiple Disease Resistance

Crop Science ◽  
2010 ◽  
Vol 50 (2) ◽  
pp. 458-466 ◽  
Author(s):  
Peter J. Balint-Kurti ◽  
Junyun Yang ◽  
George Van Esbroeck ◽  
Janelle Jung ◽  
Margaret E. Smith
Keyword(s):  
Disease Resistance ◽  
Leaf Blight ◽  
Blight Resistance ◽  
Northern Leaf Blight ◽  
Advanced Intercross Line ◽  
Multiple Disease Resistance

scholarly journals Genome‐Wide Association Study Using Historical Breeding Populations Discovers Genomic Regions Involved in High‐Quality Rice

2018 ◽  
Vol 11 (3) ◽  
pp. 170076 ◽  
Author(s):  
Gastón Quero ◽  
Lucía Gutiérrez ◽  
Eliana Monteverde ◽  
Pedro Blanco ◽  
Fernando Pérez de Vida ◽  
...  
Keyword(s):  
Association Study ◽  
Genome Wide Association Study ◽  
Genome Wide Association ◽  
High Quality ◽  
Breeding Populations ◽  
Genome Wide ◽  
Genomic Regions

scholarly journals Meta-Analysis Reveals Consensus Genomic Regions Associated with Multiple Disease Resistance in Wheat ( Triticum Aestivum L.)

2021 ◽  
Author(s):  
Dinesh Kumar Saini ◽  
Amneek Chahal ◽  
Neeraj Pal ◽  
Puja Srivast ◽  
Pushpendra Kumar Gupta
Keyword(s):  
Disease Resistance ◽  
Physical Map ◽  
Association Studies ◽  
Meta Analysis ◽  
Septoria Tritici Blotch ◽  
Septoria Tritici ◽  
Karnal Bunt ◽  
Genome Wide Association Studies ◽  
Head Blight ◽  
Multiple Disease Resistance

Abstract In wheat, meta-QTLs (MQTLs), and candidate genes (CGs) were identified for multiple disease resistance (MDR). For this purpose, information was collected from 58 studies for mapping QTLs for resistance to one or more of the five diseases. As many as 493 QTLs were available from these studies, which were distributed in five diseases as follows: septoria tritici blotch (STB) 126 QTLs; septoria nodorum blotch (SNB), 103; fusarium head blight (FHB), 184; karnal bunt (KB), 66, and loose smut (LS), 14. Of these 493 QTLs, only 291 QTLs could be projected onto a consensus genetic map, giving 63 MQTLs. The CI of the MQTLs ranged from 0.04 to 15.31 cM with an average of 3.09 cM per MQTL. This is a ~ 4.39 fold reduction from the CI of initial QTLs, which ranged from 0 to 197.6 cM, with a mean of 13.57 cM. Of 63 MQTLs, 60 were anchored to the reference physical map of wheat (the physical interval of these MQTLs ranged from 0.30 to 726.01 Mb with an average of 74.09 Mb). Thirty-eight (38) of these MQTLs were verified using marker-trait associations (MTAs) derived from genome-wide association studies. As many as 874 CGs were also identified which were further investigated for differential expression using data from five transcriptome studies, resulting in 194 differentially expressed genes (DEGs). Among the DEGs, 85 genes had functions previously reported to be associated with disease resistance. These results should prove useful for fine mapping of MDR genes and marker-assisted breeding.

Breeding for Multiple Disease Resistance in Cocoa (Theobroma cacao L.)

2012 ◽  
Vol 6 (4) ◽  
pp. 182-194 ◽  
Author(s):  
D. Nyadanu ◽  
R. Akromah ◽  
B. Adomako ◽  
H. Dzahini-Ob ◽  
A.Y. Akrofi ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Theobroma Cacao ◽  
Multiple Disease Resistance ◽  
Theobroma Cacao L

scholarly journals Screening of Wild and Cultivated Capsicum Germplasm Reveals New Sources of Verticillium Wilt Resistance

Plant Disease ◽  
2015 ◽  
Vol 99 (10) ◽  
pp. 1404-1409 ◽  
Author(s):  
Suraj Gurung ◽  
Dylan P. G. Short ◽  
Xiaoping Hu ◽  
German V. Sandoya ◽  
Ryan J. Hayes ◽  
...  
Keyword(s):  
Verticillium Wilt ◽  
Root Rot ◽  
Breeding Programs ◽  
Phytophthora Root Rot ◽  
Soilborne Disease ◽  
Multiple Disease Resistance ◽  
Capsicum Species ◽  
National Plant Germplasm System ◽  
Rot Disease

Verticillium wilt caused by Verticillium dahliae is an important soilborne disease of pepper (Capsicum species) worldwide. Most commercial pepper cultivars lack resistance to this pathogen. Our objective was to identify resistance to two V. dahliae isolates in wild and cultivated Capsicum accessions from the core collection of the National Plant Germplasm System of the USDA. Screening of 397 Capsicum accessions against two V. dahliae isolates (Vdca59 and VdCf45) was performed in a greenhouse. Seventy-eight accessions selected from this screen were further evaluated in a follow-up experiment. In total, 21 (26.9%) and 13 (16.6%) Capsicum accessions tested were resistant to Verticillium wilt when inoculated with V. dahliae isolates VdCa59 and VdCf45, respectively. Eight accessions (Grif 9073, PI 281396, PI 281397, PI 438666, PI 439292, PI 439297, PI 555616, and PI 594125) were resistant to Verticillium wilt against both V. dahliae isolates. On the basis of Germplasm Resources Information Network data, two of the Capsicum annuum accessions (Grif 9073 and PI 439297) were also resistant to Phytophthora root rot disease. These sources of multiple disease resistance will be useful to pepper breeding programs.

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