Evaluation of advanced bread wheat (Triticum aestivum) lines and synthetic hexaploid wheat derivatives (T. turgidum/Aegilops squarrosa/T. aestivum) for resistance to karnal bunt (Tilletia indica)
DOI:
https://doi.org/10.33885/sf.2007.3.992Keywords:
Partial bunt, Neovossia indica, inoculationAbstract
One hundred and forty four advanced bread wheat lines and synthetic hexaploid
wheat derivatives were evaluated under field inoculation in two planting dates, for resistance
to karnal bunt in the Yaqui Valley, Mexico. Lines with 5% infection or less, were evaluated on
the second planting date. The range of infection for the first planting date was 0 to 49.8%,
with a mean of 9.8%, while the susceptible check had 79.2% infection. Out of the 60 lines
with less than 5% infection, 59 were evaluated in the second planting date: The range of
infection was 0-40.9 with a mean of 9.1. Thirty nine percent of the lines originally classified as
resistant were resistant in the second planting date, which emphasizes the importance of
several planting dates in order to avoid escapes. The synthetic CROC_1/AE.SQUARROSA
(205) is present in the pedigree of the two lines that did not show any infected grain; other
synthetics as well as resistant cultivars HD 29 and 30 are in the pedigees of some of the lines
that had infection levels lower than 5%.
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