scholarly journals Linkage in Linum Usitatissimum and in Melampsora Lini Between Genes Controlling Host-Pathogen Reactions

1956 ◽  
Vol 9 (1) ◽  
pp. 18 ◽  
Author(s):  
GME Mayo
Keyword(s):  
Disease Resistance ◽  
Linum Usitatissimum ◽  
Susceptible Variety ◽  
Allelic Series ◽  
Critical Test ◽  
Melampsora Lini ◽  
Upper Limits ◽  
Host Pathogen

The work of FloI', the most procise published on the genetics of disease resistance in higher plant.s, is shown to establish much less t.han is claimed. His allclie series are based on one case where linkago cannot be gl'Cater than 0�3 per cent. at 0�05 lo\'n! of certainty, if t.he data (\1'0 accepted as satisfactory: in fact, they eontain several nnsatisfactory features. For the rest of Flor's evidence, upper limits of linkages between genes within his allelic series of not less than approximately 20 per cent. are possible. More critical test�s are needed, using progeny of heterozygotes buekcrossed to a universally susceptible variety.

Host–pathogen specificity in postseedling reaction of Linum usitatissimum to Melampsora lini

1992 ◽  
Vol 70 (6) ◽  
pp. 1168-1174 ◽  
Author(s):  
J. A. Hoes ◽  
E. O. Kenaschuk
Keyword(s):  
Linum Usitatissimum ◽  
Genetic Background ◽  
Virulence Genes ◽  
Single Gene ◽  
Adult Plant ◽  
Host Genotype ◽  
Resistance Level ◽  
Melampsora Lini ◽  
Host Pathogen ◽  
Different Levels

Eleven commercial flax cultivars and 10 race differentials, inoculated at the prebloom stage, showed significantly different levels of postseedling resistance to virulent races of flax rust. The effects of hosts and of races were significant or highly significant. Races differentiated hosts, hosts differentiated races, and host × race interaction was highly significant. Non-allelic, single-gene differences in host genotype were associated with higher levels of resistance and were ascribed to epistatic action by an L6-complex and by genes K1, M4, and N1. Epistatic action for susceptibility by gene L9 may have occurred in the race differentials Dakota (L9M) and Koto (L9P). The high aggressiveness of race 22 on 10 commercial race-differentiating hosts was correlated with possession of 26 virulence genes compared with 12–15 genes possessed by three other races. Indications are that allelism of host resistance genes and linked virulence of corresponding virulence genes, and also genetic background, were factors in host × pathogen interactions. The cultivar McGregor is a superior source of postseedling rust resistance because each of its genes K1 and L6 was associated with a high resistance level to race 22. Key words: adult plant, allelism, epistasis, flax.

CDC Bethune flax

2002 ◽  
Vol 82 (1) ◽  
pp. 101-102 ◽  
Author(s):  
G. G. Rowland ◽  
Y. A. Hormis ◽  
K. Y. Rashid
Keyword(s):  
Linum Usitatissimum ◽  
Oil Content ◽  
Oil Quality ◽  
High Yield ◽  
Lodging Resistance ◽  
Linum Usitatissimum L ◽  
Melampsora Lini ◽  
Crop Development ◽  
Cultivar Description ◽  
Moderately Resistant

CDC Bethune, is a medium-late-maturing oilseed flax (Linum usitatissimum L.) developed by Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan. This cultivar has medium oil content, medium oil quality, medium seed size, good lodging resistance and high yield when seeded early in the Black and the Brown Soil zones of the prairies. It is immune to North American races of rust caused by Melampsora lini and moderately resistant to wilt caused by Fusarium oxysporum f. sp. lini. Key words: Flax, oilseed, Linum usitatissimum L., cultivar description

Transcriptome analysis of scions grafted to potato rootstock for improving late blight resistance

2020 ◽  
Author(s):  
Yuexin Li ◽  
Degang Zhao
Keyword(s):  
Disease Resistance ◽  
Late Blight ◽  
Protein Kinases ◽  
Molecular Mechanisms ◽  
Late Blight Resistance ◽  
Potato Late Blight ◽  
Susceptible Variety ◽  
Resistant Variety ◽  
Blight Resistance ◽  
Expression Levels

Abstract Background: Late blight seriously threatens potato cultivation worldwide. The severe and widespread damage caused by the fungal pathogen can lead to drastic decreases in potato yield. Although grafting technology has been widely used to improve crop resistance, the effects of grafting on potato late blight resistance as well as the associated molecular mechanisms remain unclear. Therefore, we performed RNA transcriptome sequencing analysis and the late blight resistance testing of the scion when the potato late blight-resistant variety Qingshu 9 and the susceptible variety Favorita were used as the rootstock and scion, respectively, and vice versa. The objective of this study was to evaluate the influence of the rootstock on scion disease resistance and to clarify the related molecular mechanisms.Results: A Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis revealed that the expression levels of genes related to plant–pathogen interactions, plant mitogen-activated protein kinase (MAPK) signaling pathways, and plant hormone signal transduction pathways were significantly up-regulated in the scion when Qingshu 9 was used as the rootstock. These genes included late blight response genes encoding calcium-dependent protein kinases (CDPKs), chitin elicitor receptor kinases (CERKs), LRR receptor serine/threonine protein kinases (LRR-LRKs), NPR family proteins in the salicylic acid synthesis pathway, and MAPKs. When Favorita was used as the rootstock, the expression levels of the late blight response genes were not up-regulated in the Qingshu 9 scion, but the expression levels of the genes related to proline metabolism, fatty acid chain elongation, and diterpenoid biosynthesis pathways were down-regulated. Resistance results showed that self-grafting of the susceptible variety and grafting with the resistant variety as the rootstock increased the resistance of the susceptible scion to late blight. However, the resistance was stronger after grafting with the resistant variety as the rootstock. Using the susceptible variety as the rootstock decreased the late blight resistance of the resistant scion.Conclusions: Our results showed that changes to the expression of disease resistance genes in the scion after grafting are associated with late blight resistance. The results provide the basis for exploring the molecular mechanism underlying the effects of rootstocks on scion disease resistance.

CDC Buryu oilseed flax

2020 ◽  
Author(s):  
Helen M. Booker ◽  
Gordon Rowland ◽  
Hadley R. Kutcher ◽  
khalid Y. rashid
Keyword(s):  
Linum Usitatissimum ◽  
Oil Content ◽  
Oil Quality ◽  
Black Soil ◽  
Lodging Resistance ◽  
Linum Usitatissimum L ◽  
Melampsora Lini ◽  
Crop Development ◽  
Moderately Resistant ◽  
Maturity Rating

CDC Buryu, a late maturing oilseed flax (Linum usitatissimum L.), was registered in 2016 by the Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan. This cultivar had yield (106%) comparable to CDC Bethune and a maturity rating equal to Flanders in all soil zones of the Northern Prairies. The yield advantage over CDC Bethune was greater (>8%) in the Brown soil and Black soil zones of the Northern Prairies. It had medium oil content, oil quality, and seed size and good lodging resistance. It is immune to North American rust (race 371) caused by Melampsora lini and moderately resistant to wilt caused by Fusarium oxysporum f. sp. Lini and powdery mildew caused by Oidium lini.

AC Emerson flax

1996 ◽  
Vol 76 (3) ◽  
pp. 483-485 ◽  
Author(s):  
E. O. Kenaschuk ◽  
K. Y. Rashid ◽  
G. H. Gubbels
Keyword(s):  
Key Words ◽  
Linum Usitatissimum ◽  
Oil Quality ◽  
Calcareous Soils ◽  
Research Centre ◽  
Linum Usitatissimum L ◽  
Melampsora Lini ◽  
Early Maturing ◽  
Cultivar Description ◽  
Moderately Resistant

AC Emerson, a medium-early maturing oilseed flax (Linum usitatissimum L.), was released by Agriculture and Agri-Food Canada, Agri-Food Diversification Research Centre, Morden, Manitoba, in 1994. The cultivar has high oil quality, medium-large seed size and was high yielding in both early and late seeding tests in the Black and the Brown Soil zones of Manitoba and Saskatchewan. Because of its chlorosis tolerance, it is particularly well suited to the calcareous soils of Manitoba. It is immune to North American races of rust caused by Melampsora lini and moderately resistant to wilt caused by Fusarium oxysporum f. sp. lini. Key words: Flax, oilseed, Linum usitatissimum L., cultivar description

AC Watson flax

1998 ◽  
Vol 78 (3) ◽  
pp. 465-466 ◽  
Author(s):  
E. O. Kenaschuk ◽  
K. Y. Rashid
Keyword(s):  
Linum Usitatissimum ◽  
Oil Quality ◽  
Research Centre ◽  
Lodging Resistance ◽  
Linum Usitatissimum L ◽  
Melampsora Lini ◽  
Early Maturing ◽  
Cultivar Description ◽  
Good Yielding ◽  
Moderately Resistant

AC Watson, a medium–early maturing oilseed flax (Linum usitatissimum L.) was released in 1997 by Agriculture and Agri-Food Canada, Research Centre, Morden, Manitoba. The cultivar has high oil quality, medium-large seed size, good lodging resistance, and with good yielding in both early and late seeding in the Black and the Brown Soil zones of the prairies. It is immune to North American races of rust caused by Melampsora lini and moderately resistant to wilt caused by Fusarium oxysporum f. sp. lini. Key words: Flax, oilseed, Linum usitatissimum L., cultivar description

Prairie Blue flax

2004 ◽  
Vol 84 (3) ◽  
pp. 801-803 ◽  
Author(s):  
S. D. Duguid ◽  
E. O. Kenaschuk ◽  
K. Y. Rashid
Keyword(s):  
Linum Usitatissimum ◽  
Oil Quality ◽  
High Yield ◽  
Research Station ◽  
Lodging Resistance ◽  
Linum Usitatissimum L ◽  
Melampsora Lini ◽  
Small Seed ◽  
Cultivar Description ◽  
Moderately Resistant

Prairie Blue, a medium- late maturing oilseed flax (Linum usitatissimum L.), was released in 2003 by Agriculture and Agri-Food Canada, Morden Research Station, Morden, Manitoba. This cultivar has high oil content, high oil quality, small seed size, very good lodging resistance and high yield in all soil zones of the prairies. It is immune to current North American races of rust [Melampsora lini (Ehrenb.) Desmaz], and moderately resistant to wilt caused by Fusarium oxysporum Schlecht. f. sp. lini (Bolley) Snyder & Hansen. Key words: Flax, oilseed, Linum usitatissimum L., cultivar description

Hanley Flax

2003 ◽  
Vol 83 (1) ◽  
pp. 85-87 ◽  
Author(s):  
S. D. Duguid ◽  
E. O. Kenaschuk ◽  
K. Y. Rashid
Keyword(s):  
Linum Usitatissimum ◽  
Oil Content ◽  
Oil Quality ◽  
High Yield ◽  
Research Station ◽  
Lodging Resistance ◽  
Linum Usitatissimum L ◽  
Melampsora Lini ◽  
Cultivar Description ◽  
Very High

Hanley, a medium maturing oilseed flax (Linum usitatissimum L.) was released in 2001 by Agriculture and Agri-Food Canada, Morden Research Station, Morden, Manitoba. This cultivar has medium oil content, very high oil quality, medium seed size, very good lodging resistance, and high yield when seeded in all soil zones of the prairies. It is immune to North American races of rust caused by Melampsora lini (Ehrenb.) Desmaz, and resistant to wilt caused by Fusarium oxysporum f. sp. lini Schlecht. f. sp. lini (Bolley) Snyder & Hansen. Key words: Flax, oilseed, Linum usitatissimum L., cultivar description

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