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Inheritance of Rust Resistance in Safflower 1
Author(s) -
Zimmer D. E.,
Urie A. L.
Publication year - 1969
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1969.0011183x000900040032x
Subject(s) - carthamus , biology , seedling , rust (programming language) , gene , botany , genetics , inheritance (genetic algorithm) , resistance (ecology) , agronomy , traditional medicine , medicine , computer science , programming language
The inheritance of resistance in safflower, Carthamus tinctorius L., to the foliage and seedling phase of rust, incited by Puccinia carthami Cda., was studied in crosses between rust‐susceptible lines and three resistant selection (‘PI 195895‐95,’ ‘PI 250601‐109,’ ‘PI 253914‐5’). The relationship between the genes for resistance of these selections and the resistance genes of ‘7083‐245‐8,’ ‘PI 250721‐73,’ and ‘Nebraska 1‐1‐5’ was determined from the segregation ratios exhibited in the F 2 and F 3 generations. Three independently inherited‐dominant‐factor pairs AA, II, and MM, which individually and collectively condition resistance to both seedling and foliage rust, were found — Gene A in PI 253914‐5, gene M in PI 195895‐95 and 7083‐245‐8, and gene I in PI 250601‐109 and PI 250721‐73. Genes A, I, and M were inherited independently of the exclusionary resistance gene‐pair N 1 N 1 of Nebraska 1‐1‐5. They are believed to be unrelated to the OyOy gene pair for resistance in Carthamus oxyacantha M.B.