ANTICIPATORY BREEDING FOR RESISTANCE TO RUST DISEASES IN WHEAT

To determine whether a resistant chemotype to the white pine weevil, Pissodesstrobi Peck, could be identified, the relative composition of monoterpenes in weevil-susceptible Sitka spruce, Piceasitchensis (Bong.) Carr., was compared to that in apparently resistant trees. Foliar and cortical analysis of trees from Green Timbers Nursery in Surrey, Nootka Island, Sayward, and the Nass River Valley, B.C., revealed significant differences between 38 resistant and 60 susceptible trees. The foliage of resistant trees, compared with that of susceptible trees, had significantly lower amounts of isoamyl isovalerate at three sites and lower amounts of isopentenyl isovalerate at one site. Amounts of a α-pinene, β-pinene, camphene, and camphor were significantly higher in some resistant trees, but these differences were not consistent between sites. Myrcene, β-phellandrene, and limonene levels were much higher in the cortex of susceptible trees than the resistant trees from the Nass River and Green Timbers Nursery. Thus none of the monoterpenes, singly or in combination, is a consistent indicator of resistance to the white pine weevil. The two isovalerates could possibly be used as indicators of resistance. However, a broader spectrum of resistance characteristics should be employed if breeding for resistance is desired.

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Sorghum [Sorghum bicolor (L.) Moench] breeding for resistance to leaf and stalk anthracnose, Colletotrichum sublineolum, and improved yield: Progress and prospects

Australian Journal of Crop Science ◽

10.21475/ajcs.17.11.09.pne347 ◽

2017 ◽

Vol 11 (09) ◽

pp. 1078-1085 ◽

Cited By ~ 3

Author(s):

Maletsema Alina Mofokeng ◽

◽

Hussein Shimelis ◽

Mark Laing ◽

Nemera Shargie ◽

...

Keyword(s):

Sorghum Bicolor ◽

Breeding For Resistance ◽

Colletotrichum Sublineolum ◽

Sorghum Bicolor L

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Resistance of Tangmai 4 wheat to powdery mildew, stem rust, leaf rust, and stripe rust and its chromosome composition

Canadian Journal of Plant Science ◽

10.4141/p03-195 ◽

2004 ◽

Vol 84 (4) ◽

pp. 1015-1023 ◽

Cited By ~ 9

Author(s):

H. J. Li ◽

R. L. Conner ◽

B. D. McCallum ◽

X. M. Chen ◽

H. Su ◽

...

Keyword(s):

Powdery Mildew ◽

Leaf Rust ◽

Stripe Rust ◽

Stem Rust ◽

Northern China ◽

Western Canada ◽

C Banding ◽

Rust Diseases ◽

Hard Red Winter Wheat ◽

Secale Cereale L

The hard red winter wheat Tangmai 4 did not develop symptoms of infection following inoculation with powdery mildew (Erysiphe graminis DC. f. sp. tritici E. Marchal) isolates from regions of western Canada and northern China. Tangmai 4 exhibited resistance to stem rust (Puccinia graminis Pers. f. sp. tritici Eriks. & Henn.) and leaf rust (P. triticina Eriks.) races from western Canada. This wheat line was resistant to individual stripe rust (P. striiformis Westend. f. sp. tritici Eriks.) races from the U.S. and Canada. Sequential C-banding and genomic in situ hybridization (GISH), and electrophoretic analyses of high molecular weight glutenins and gliadins demonstrated that Tangmai 4 carried a pair of T1BL·1RS wheat-rye (Secale cereale L.) translocated chromosomes. Since the genes located on T1BL·1RS are no longer effective in controlling powdery mildew and the rust diseases, Tangmai 4 must carry additional genes for resistance to these diseases, which makes it a valuable resource for the improvement of resistance in wheat against these diseases. Key words: T1BL·1RS translocation, disease resistance, sequential C-banding and GISH, glutenin, gliadin

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Rust Diseases

Encyclopedia of Entomology ◽

10.1007/978-1-4020-6359-6_3467 ◽

2008 ◽

pp. 3218-3218

Author(s):

Norman C. Leppla ◽

Bastiaan M. Drees ◽

Allan T. Showler ◽

John L. Capinera ◽

Jorge E. Peña ◽

...

Keyword(s):

Rust Diseases

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