Abstract
Identification of seedling and slow stripe rust resistance genes is important for gene pyramiding, gene deployment, and developing slow-rusting wheat cultivars to control the disease. A total of 98 Chinese lines were inoculated with 26 pathotypes of Puccinia striiformis f. sp. tritici for postulation of stripe rust resistance genes effective at the seedling stage. A total of 135 wheat lines were planted at two locations to characterize their slow rusting responses to stripe rust in the 2003-2004 and 2004-2005 cropping seasons. Genes Yr2, Yr3a, Yr4a, Yr6, Yr7, Yr9, Yr26, Yr27, and YrSD, either singly or in combinations, were postulated in 72 lines, whereas known resistance genes were not identified in the other 26 accessions. The resistance genes Yr9 and Yr26 were found in 42 and 19 accessions, respectively. Yr3a and Yr4a were detected in two lines, and four lines may contain Yr6. Three lines were postulated to possess YrSD, one carried Yr27, and one may possess Yr7. Thirty-three lines showed slow stripe rusting resistance at two locations in both seasons.
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Claims 10
Claim · model-written summary
Nine named Yr genes were postulated in 72 lines.
Verbatim
e0“Genes Yr2, Yr3a, Yr4a, Yr6, Yr7, Yr9, Yr26, Yr27, and YrSD, either singly or in combinations, were postulated in 72 lines”
t0“Chinese Common Wheats”
Claim · model-written summary
Known resistance genes were not identified in 26 accessions.
Verbatim
e0“known resistance genes were not identified in the other 26 accessions”
t0“Chinese Common Wheats”
Claim · model-written summary
Yr9 was found in 42 accessions.
Verbatim
e0“Yr9 and Yr26 were found in 42 and 19 accessions, respectively”
t0“Chinese Common Wheats”
Claim · model-written summary
Yr26 was found in 19 accessions.
Verbatim
e0“Yr9 and Yr26 were found in 42 and 19 accessions, respectively”
t0“Chinese Common Wheats”
Claim · model-written summary
Yr3a and Yr4a were detected in two lines.
Verbatim
e0“Yr3a and Yr4a were detected in two lines”
t0“Chinese Common Wheats”
Claim · model-written summary
Four lines may contain Yr6.
Verbatim
e0“four lines may contain Yr6”
t0“Chinese Common Wheats”
Claim · model-written summary
Three lines were postulated to possess YrSD.
Verbatim
e0“Three lines were postulated to possess YrSD”
t0“Chinese Common Wheats”
Claim · model-written summary
One line carried Yr27.
Verbatim
e0“one carried Yr27”
t0“Chinese Common Wheats”
Claim · model-written summary
One line may possess Yr7.
Verbatim
e0“one may possess Yr7”
t0“Chinese Common Wheats”
Claim · model-written summary
Thirty-three lines showed slow rusting at both locations in both seasons.
Verbatim
e0“Thirty-three lines showed slow stripe rusting resistance at two locations in both seasons”
t0“Chinese Common Wheats”