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Abstract Detail



Reproductive biology

Cattani, Douglas John [1], Linski, Gabriel [1], Grieger, Ardelle [1].

Selection of a perennial grain for seed productivity across years: Thinopyrum intermedium as the test species.

Selection for a perennial grain is a relatively new endeavour. Unlike annual species, a perennial plant, if it is to be used as a source of grain, should be reproductively successful over more than a single reproductive year. This necessitates evaluating individuals over a number of reproductive periods over a number of years. We assessed seed production of Thinopyrum intermedium (Host) Barkworth & D.R. Dewey (intermediate wheatgrass) plants over three reproductive years to assess the relative stability of seed yield. Individual accessions were transplanted into the field in 2011 and harvested for seed in 2012 (1700 plants), 2013 (1150 plants) and 2014 (250 plants). Due to differences in the occurrence of bare caryopsis, all yields were expressed on a bare caryopsis basis. Selections based solely upon the first harvested seed crop are relatively inefficient in identifying individuals with long-term (three years) reproductive success. The second and third reproductive year harvests were more successful in identifying consistent seed yielding individuals than the first reproductive year harvest. Restating seed yield to a relative (percentage of the yearly mean yield) versus an actual yield basis altered the order between the second and third years’ of data in the ability of identify superior individuals. Selection for perennial grain crops will require a long-term commitment per selection cycle in order for breeding efforts to the successfully develop an economically acceptable product for producer use in western Canada.


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1 - University of Manitoba, Plant Science, Room 222, 66 Dafoe Road, Winnipeg, Manitoba, R3T 2N2, Canada

Keywords:
reproductive success
Thinoprum intermedium
seed yield consistency.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PRP002
Abstract ID:345
Candidate for Awards:None


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