Abstract
Stripe rust is an important disease in wheat, and development of genetic resistance in cultivars is an effective approach to control the disease. Wild species of wheat, such as Thinopyrum intermedium, are an excellent gene source for wheat improvement. In this study, two stripe rust-resistant wheat–Th. intermedium chromosome translocation lines, CH4131 and CH4132, were characterized by cytogenetic and pathological methods. The introgressed chromosome fragment was tagged using amplified fragment-length polymorphism-derived sequence-characterized amplified region (SCAR) markers and intron targeting markers, indicating that CH4131 and CH4132 both possess a homologous group 3 chromatin of Th. intermedium. Genomic in situ hybridization results suggested that a very small Th. intermedium chromosome segment was translocated to the terminal region of wheat 1BS for both lines, forming a configuration of T3Ai-1BS.1BL. The two translocation lines were resistant to stripe rust, and the resistance gene, temporarily designated YrCH-1BS, was likely derived from Th. intermedium. The translocated chromosome fragments have no genetic linkage drag to agronomic performance. The grain quality indexes of these two translocations were higher than local wheat varieties. Therefore, CH4131 and CH4132 could be used as potential gene sources in wheat improvement programs. The SCAR markers are useful to select stripe rust resistance from Th. intermedium.
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Claims 8
Claim · model-written summary
Both lines contained homologous group 3 chromatin of Thinopyrum.
Not reportedTaxon
Verbatim
e0“CH4131 and CH4132 both possess a homologous group 3 chromatin of Th. intermedium.”
Claim · model-written summary
A small Thinopyrum segment was translocated to wheat 1BS in both lines.
- Taxon
- wheat
Triticum aestivume0 - Gene
- wheat 1BSe0
- Outcome
- Th. intermedium chromosome segment was translocatede0
- Qualifier
- for both linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a very small Th. intermedium chromosome segment was translocated to the terminal region of wheat 1BS for both lines, forming a configuration of T3Ai-1BS.1BL.”
Claim · model-written summary
Both translocation lines were stripe rust resistant.
Not reportedTaxon
Verbatim
e0“The two translocation lines were resistant to stripe rust”
Claim · model-written summary
The resistance gene YrCH-1BS was likely derived from Thinopyrum.
Not reportedTaxon
Verbatim
e0“the resistance gene, temporarily designated YrCH-1BS, was likely derived from Th. intermedium.”
Claim · model-written summary
Translocated fragments showed no genetic linkage drag for agronomic performance.
- Outcome
- no genetic linkage drag to agronomic performancee0
Not reportedTaxon
Verbatim
e0“The translocated chromosome fragments have no genetic linkage drag to agronomic performance.”
Claim · model-written summary
Grain quality indices of both lines exceeded local varieties.
- Taxon
- wheatTriticum aestivume0
- Outcome
- grain quality indexese0
- Direction
- highere0
- Comparator
- local wheat varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain quality indexes of these two translocations were higher than local wheat varieties.”
Claim · model-written summary
The lines were proposed as gene sources for wheat improvement.
- Taxon
- wheatTriticum aestivume0
- Material
- CH4131 and CH4132e0
- Outcome
- potential gene sources in wheat improvement programse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CH4131 and CH4132 could be used as potential gene sources in wheat improvement programs.”
Claim · model-written summary
SCAR markers were useful for selecting Thinopyrum stripe rust resistance.
Not reportedTaxonComparatorValue
Verbatim
e0“The SCAR markers are useful to select stripe rust resistance from Th. intermedium.”