Abstract
A study was conducted to assess the durable resistance in a near isogenic line of spring wheat (Triticum aestivalis L.), possessing resistance gene Yr-18 to some isolates (race specific resistance) of stripe rust (Puccinia striiformis f. sp. tritici), namely Thatcher Yr-18 and durable resistance of an cultivar of spring wheat to all isolates of stripe rust (race non- specific resistance), namely Hybrid de Berse'e. In this investigation fresh urediniospores of two isolates namely SRC 99 (race 70E 128) and SRC 89 (race 14E 14), were collected from a susceptible cultivar of spring wheat, Avocet, as inoculums. Then suspension of spore in mineral oil [Soltrol 170 (5 mg/ml)] were sprayed on third and flag leaves of the booth genotypes mentioned above and on the Thatcher cultivar which was susceptible to booth isolates. The Percentage of urediniospore germination, latent period and infection types of all susceptible and resistant genotypes to booth isolates were determined in four replicates at seedling and adult plant stages. Mean percentage of spore germination and the value of latent period were analyzed separately in each replicate, and then compared using analysis of variance and the Student- Newman Keuls test. The results indicated that urediniospoe germination in all genotypes / isolates/ leaf stage combination was high and neither resistance type affected spore germination significantly. In both types of resistance, latent period increased with advancing plant age. In general cultivars possessing resistant gene had longer latent periods. Assessment of the infection type showed that, the durable resistance of Hybrid de Bers?e is detected at an earlier stage than the adult-plant resistance of near isogenic line containing the gene Yr18.
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Claims 4
Claim · model-written summary
Neither resistance type significantly affected stripe rust urediniospore germination, which remained high.
- Taxon
- spring wheat
Triticum aestivume1 - Interactor
- Puccinia striiformis f. sp. tritici
Puccinia striiformis f. sp. triticie1pathogen - Outcome
- spore germinatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“urediniospoe germination in all genotypes / isolates/ leaf stage combination was high and neither resistance type affected spore germination significantly”
e1“spring wheat (Triticum aestivalis L.), possessing resistance gene Yr-18 to some isolates (race specific resistance) of stripe rust (Puccinia striiformis f. sp. tritici)”
Claim · model-written summary
Latent period increased with plant age in both resistance types.
- Taxon
- spring wheatTriticum aestivume1
- Organ / stage
- plant agee0
- Interactor
- Puccinia striiformis f. sp. triticiPuccinia striiformis f. sp. triticie1pathogen
- Outcome
- latent periode0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both types of resistance, latent period increased with advancing plant age”
e1“spring wheat (Triticum aestivalis L.), possessing resistance gene Yr-18 to some isolates (race specific resistance) of stripe rust (Puccinia striiformis f. sp. tritici)”
Claim · model-written summary
Resistant gene cultivars generally had longer latent periods.
- Taxon
- spring wheatTriticum aestivume1
- Material
- cultivars possessing resistant genee0
- Interactor
- Puccinia striiformis f. sp. triticiPuccinia striiformis f. sp. triticie1pathogen
- Outcome
- latent periodse0
- Direction
- longere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general cultivars possessing resistant gene had longer latent periods”
e1“spring wheat (Triticum aestivalis L.), possessing resistance gene Yr-18 to some isolates (race specific resistance) of stripe rust (Puccinia striiformis f. sp. tritici)”
Claim · model-written summary
Durable resistance of Hybrid de Bers?e was detectable earlier than Yr18 near isogenic line adult-plant resistance.
- Taxon
- spring wheatTriticum aestivume1
- Material
- Hybrid de Bers?ee0
- Interactor
- Puccinia striiformis f. sp. triticiPuccinia striiformis f. sp. triticie1pathogen
- Gene
- Yr18e0
- Outcome
- durable resistancee0
- Direction
- earliere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the durable resistance of Hybrid de Bers?e is detected at an earlier stage than the adult-plant resistance of near isogenic line containing the gene Yr18”
e1“spring wheat (Triticum aestivalis L.), possessing resistance gene Yr-18 to some isolates (race specific resistance) of stripe rust (Puccinia striiformis f. sp. tritici)”