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Crown Rust Resistance of the Oat Strain P. I. 174544 1
Author(s) -
Simons M. D.
Publication year - 1967
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/cropsci1967.0011183x000700050021x
Subject(s) - biology , rust (programming language) , seedling , crown (dentistry) , resistance (ecology) , horticulture , strain (injury) , agronomy , botany , anatomy , medicine , dentistry , computer science , programming language
The oat strain P.L 174544 ( Arena sativa L.) has adult plant but not seedling resistance to race groups 202 and 264, and some races of group 290 of crown rust ( Puccinia coronata Cda. var. avenae Fraser and Led.). Its resistance was conditioned by a single major gene, but minor genc effects were also important under some conditions. The resistance of P.I. 174544 was nonallelic to that of certain other well‐known sources of field resistance. Pure lines derived from crossing P.I. 174544 with the susceptible ‘Clinton’ were obtained that had the full resistance of P.I. 174544, as measured in terms of effect of crown rust on yield, seed weight and seed density.