|
AGRICULTURAE
CONSPECTUS SCIENTIFICUS
Volume 65, No 2, 2000 (115-121)
ORIGINAL SCIENTIFIC
PAPER
Pre-Harvest Sprouting and Dormancy in Diverse Wheat Genotypes
Hrvoje SARCEVIC
Zdravko MARTINIC-JERCIC
Marijana BARIC
Jerko GUNJACA
SUMMARY
Fifty wheat genotypes have been sown in northwestern Croatia, in 1994/95
and 1995/96 in order to determine variation for pre-harvest sprouting
susceptibility and dormancy. Sprouting susceptibility was tested at physiological
maturity, using intact spikes in wet paper towels. Dormancy level was
detected from simple germination tests on treshed seeds at three intervals
after harvest . 24 genotypes in 1995 and 30 genotypes in 1996 had the
same level of sprouting resistance at physiological maturity as the sprouting
resistant standard RL.4137. By comparison, a smaller number of genotypes
were ranked equal to RL.4137 on the basis of the level of dormancy measured
at three intervals after harvest. More genotypes appeared similar to RL.4137
on the third than after the seventh day of germination. This was a consequence
of the low level of germination at the third day combined with relatively
high level at the seventh day in some genotypes. In addition to a lower
germination percentage , dormancy in these genotypes was detected as delayed
germination. Thus, dormancy measurements after both three and seven days
of germination would appear to be useful for detection of this characteristic.
High genotype by environment interaction observed for sprouting susceptibility
as well as for dormancy suggests the need of testing genotypes in more
environments.
KEY WORDS
wheat, pre-harvest sprouting, dormancy
Department of Plant Breeding, Genetics, Biometrics and Experimentation
Faculty of Agriculture University of Zagreb
Svetosimunska 25, 10000 Zagreb, Croatia
E-mail: hsarcevic@agr.hr
Received: November 15, 1999
|
