Comparative genetic analysis of field resistance to downy mildew in the lettuce cultivars ‘Grand Rapids’ and ‘Iceberg’

Euphytica ◽  
2005 ◽  
Vol 142 (3) ◽  
pp. 205-215 ◽  
Author(s):  
Rebecca C. Grube ◽  
Oswaldo E. Ochoa
Keyword(s):  
Genetic Analysis ◽  
Downy Mildew ◽  
Field Resistance ◽  
Grand Rapids ◽  
Comparative Genetic Analysis

scholarly journals Identification of major quantitative trait loci controlling field resistance to downy mildew in cultivated lettuce (Lactuca sativa L.)

2020 ◽  
Author(s):  
Lorena B Parra ◽  
Ivan Simko ◽  
Richard Michelmore
Keyword(s):  
Downy Mildew ◽  
Lactuca Sativa ◽  
Quantitative Trait ◽  
Durable Resistance ◽  
Gene Pyramiding ◽  
Field Resistance ◽  
Significant Qtls ◽  
Resistant Cultivars ◽  
Lactuca Sativa L ◽  
Grand Rapids

Lettuce downy mildew caused by Bremia lactucae Regel is the most economically important foliar disease of lettuce (Lactuca sativa L.). The deployment of resistant cultivars carrying dominant resistance genes (Dm genes) plays a crucial role in integrated downy mildew disease management; however, high variability in pathogen populations leads to the defeat of plant resistance conferred by Dm genes. Some lettuce cultivars exhibit field resistance that is only manifested in adult plants. Two populations of recombinant inbred lines (RILs), originating from crosses between the field resistant cultivars Grand Rapids and Iceberg and susceptible cultivars Salinas and PI491224, were evaluated for downy mildew resistance under field conditions. One hundred and sixty RILs from the Iceberg × PI491224 and 88 RILs from the Grand Rapids × Salinas RIL populations were genotyped using genotyping by sequencing, which respectively generated 906 and 746 high quality markers that were used for quantitative trait locus (QTL) analysis. We found a QTL in Chromosome 4 that is present in both Grand Rapids × Salinas and Iceberg × PI491224 populations that has a major effect on field resistance. We also found two additional significant QTLs in Chromosomes 2 and 5 in the Iceberg × PI491224 RIL population. Marker-assisted gene pyramiding of multiple Dm genes in combination with QTLs for field resistance provides the opportunity to develop cultivars with more durable resistance to B. lactucae.

A demonstration of the inheritance of field resistance to lettuce downy mildew (Bremia lactucae Regel.) in progeny derived from cv. Grand Rapids

Euphytica ◽  
1983 ◽  
Vol 32 (1) ◽  
pp. 161-170 ◽  
Author(s):  
Judith M. Norwood ◽  
I. R. Crute ◽  
A. G. Johnson ◽  
Pamela L. Gordon
Keyword(s):  
Downy Mildew ◽  
Field Resistance ◽  
Bremia Lactucae ◽  
Lettuce Downy Mildew ◽  
Grand Rapids

GENETIC ANALYSIS OF DOWNY MILDEW RESISTANCE DERIVED FROM MUSCADINIA ROTUNDIFOLIA

2003 ◽  
pp. 451-456 ◽  
Author(s):  
Didier Merdinoglu ◽  
Sabine Wiedeman-Merdinoglu ◽  
Pascale Coste ◽  
Vincent Dumas ◽  
Stephanie Haetty ◽  
...  
Keyword(s):  
Genetic Analysis ◽  
Downy Mildew ◽  
Downy Mildew Resistance ◽  
Mildew Resistance ◽  
Muscadinia Rotundifolia

Genetic analysis of resistance to sorghum downy mildew and Rajasthan downy mildew in maize (Zea mays L.)

2004 ◽  
Vol 89 (2-3) ◽  
pp. 379-387 ◽  
Author(s):  
Sudha K Nair ◽  
B.M Prasanna ◽  
R.S Rathore ◽  
T.A.S Setty ◽  
R Kumar ◽  
...  
Keyword(s):  
Zea Mays ◽  
Genetic Analysis ◽  
Downy Mildew ◽  
Zea Mays L ◽  
Sorghum Downy Mildew

Comparative Genetic Analysis of Homeobox Genes in Mouse and Man

1987 ◽  
pp. 73-86 ◽  
Author(s):  
Frank H. Ruddle ◽  
Charles P. Hart ◽  
Mark Rabin ◽  
Anne Ferguson-Smith ◽  
Dimitrina Pravtcheva
Keyword(s):  
Genetic Analysis ◽  
Homeobox Genes ◽  
Comparative Genetic Analysis

scholarly journals Genetic Analysis of Field Resistance to Leaf Blast (Pyricularia oryzae) in Rice

1978 ◽  
Vol 28 (4) ◽  
pp. 277-286 ◽  
Author(s):  
Tadaaki HIGASHI ◽  
Kinya KUSHIBUCHI
Keyword(s):  
Genetic Analysis ◽  
Field Resistance ◽  
Pyricularia Oryzae ◽  
Leaf Blast

scholarly journals Comparative genetic analysis of the novel coronavirus (2019-nCoV/SARS-CoV-2) receptor ACE2 in different populations

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Yanan Cao ◽  
Lin Li ◽  
Zhimin Feng ◽  
Shengqing Wan ◽  
Peide Huang ◽  
...  
Keyword(s):  
Genetic Analysis ◽  
The Novel ◽  
Comparative Genetic Analysis ◽  
Different Populations ◽  
Novel Coronavirus

scholarly journals Comparative genetic analysis of quantitative traits in sunflower (Helianthus annuus L.)

2004 ◽  
Vol 109 (4) ◽  
pp. 865-874 ◽  
Author(s):  
P. -F. Bert ◽  
G. Dechamp-Guillaume ◽  
F. Serre ◽  
I. Jouan ◽  
D. Tourvieille de Labrouhe ◽  
...  
Keyword(s):  
Genetic Analysis ◽  
Helianthus Annuus ◽  
Quantitative Traits ◽  
Helianthus Annuus L ◽  
Comparative Genetic Analysis
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