Description
Resistance to stem rust (caused by Puccinia graminis Pers.: Pers. subsp. graminicola Z. Urban.) would be beneficial in tall fescue (Festuca arundinacea Schreb.). Two cycles of polycross (PX) selection on progenies from thirty-four parent plants (14 forage-types and 20 turf-types) were compared to one cycle of open pollination (OP) followed by one cycle of PX selection using a 2-stage greenhouse screening process. Response from selection was determined from composite half-sib progenies from each cycle. Number of plants with resistant reaction based on pustule type increased from 5 to 54% in the PX forage-type population and from 6 to 50% in the PX turf-types. Overall response from initial OP selection was similar to PX selection, but 78 and 50% of the gain, respectively, occurred in the PX cycle. Results indicated that rapid progress from selection in the greenhouse for stem rust resistance in tall fescue is possible using PX selection.
Citation
Barker, R E. and Welty, R E., "Direct Selection Response for Stem Rust Resistance in Tall Fescue" (2024). IGC Proceedings (1993-2023). 45.
https://uknowledge.uky.edu/igc/1997/session4/45
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Direct Selection Response for Stem Rust Resistance in Tall Fescue
Resistance to stem rust (caused by Puccinia graminis Pers.: Pers. subsp. graminicola Z. Urban.) would be beneficial in tall fescue (Festuca arundinacea Schreb.). Two cycles of polycross (PX) selection on progenies from thirty-four parent plants (14 forage-types and 20 turf-types) were compared to one cycle of open pollination (OP) followed by one cycle of PX selection using a 2-stage greenhouse screening process. Response from selection was determined from composite half-sib progenies from each cycle. Number of plants with resistant reaction based on pustule type increased from 5 to 54% in the PX forage-type population and from 6 to 50% in the PX turf-types. Overall response from initial OP selection was similar to PX selection, but 78 and 50% of the gain, respectively, occurred in the PX cycle. Results indicated that rapid progress from selection in the greenhouse for stem rust resistance in tall fescue is possible using PX selection.
