HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Allan, R. E. Articles by Pritchett, J. A. Search for Related Content PubMed Articles by Allan, R. E. Articles by Pritchett, J. A. Agricola Articles by Allan, R. E. Articles by Pritchett, J. A.

Relationships of Stripe Rust Spike Infection to Morphologic and Agronomic Traits of Wheat¹

The relationships of spike infection caused by the stripe rust fungus (Puccinia striiformis West.) with awn expression, spike type and plant height among near-isogenic lines of winter wheat (Triticum aestivum L.) were studied at Pullman, Washington in 1966–67. The percentage and severity of lemma infection served to determine spike infection. Awned lines had 16 to 41% more lemmas infected than awnless sibs suggesting that the awn influences the incidence of the disease. Presence or absence of the club gene did not affect the occurrence of lemma infection. Plant height was related to the percentage and severity of lemma infection in all five populations tested, but this relationship varied. Short lines tended to be more vulnerable to lemma infection by stripe rust in some seasons and in certain genetic backgrounds. Yield losses correlated with the percentage and severity of lemma infection among near-isogenic lines of C.I. 13253/7*‘Burt.’ Test weight differences were related to both the percentage and severity of lemma infection by the disease.

Key Words: Near-isogenic lines • Puccinia striiformis West • Lemma infection • Yield loss

² Research Geneticist and Research Technician, Plant Science Research Division, Agricultural Research Service, U. S. Department of Agriculture, Pullman, Washington 99163.

Received for publication September 3, 1971.