Relationship between seed dormancy and falling number in wheat
Andrzej Binek
khrin@urk.edu.plKatedra Hodowli Roślin i Nasiennictwa, Akademia Rolnicza im. Hugona Kołłątaja w Krakowie (Poland)
Maria Moś
Katedra Hodowli Roślin i Nasiennictwa, Akademia Rolnicza im. Hugona Kołłątaja w Krakowie (Poland)
Abstract
Grain dormancy was determined in 20 winter wheat cultivars, basing on evaluation of germination at the constant temperatures of 15, 20 and 25°C, starting from the 10th day after harvest. The examined cultivars were significantly differentiated for all examined indices. The largest differences were found at 25°C for the germination rate assessed according to Maguire (10.6–22.3), mean germination time (2.2–3.3 days) and germination ability (70–97%). Falling number was determined for the samples exposed to sprouting induction in ears, samples subjected to incipient germination in Petri dishes as well as for the control samples. On the basis of these data differences in falling number were calculated together with falling number indices, according to Weilenmann (1979). In the control samples the falling number ranged from 233 to 432 sec. The sprouting induction in ears and in the germination dishes caused a decrease of falling number by 100 and 82 sec., respectively. The relationship between germination speed and the falling number index was highly significant (r = 0.584** to 0.748**), which proves usefulness of this index in breeding cultivars resistant to preharvest sprouting. Two of the tested cultivars: Symfonia and Mikon had low falling number index, which shows their good sprouting tolerance. On the other hand, the Wanda and Rysa cultivars, with high Weilenmann indices, were susceptible to sprouting.
Keywords:
cultivars, dormancy, falling number, germination speed, sprouting, winter wheatReferences
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Authors
Andrzej Binekkhrin@urk.edu.pl
Katedra Hodowli Roślin i Nasiennictwa, Akademia Rolnicza im. Hugona Kołłątaja w Krakowie Poland
Authors
Maria MośKatedra Hodowli Roślin i Nasiennictwa, Akademia Rolnicza im. Hugona Kołłątaja w Krakowie Poland
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