Plant Protection Science (1997) 33, 25-32

Zdenka Martinkova and Alois Honek (1997)
Geographic variation in the rate of seed dormancy termination in barnyard grass, Echinochloa crus-galli
Plant Protection Science 33 (1), 25-32
Abstract: The time required for termination of seed dormancy was tested in samples of seeds of 22 populations of Echinochloa crus-galli (L.) P. Beauv. from central Bohemia. Three months after collecting, water imbibed caryopses were placed at 5 °C and in darkness. The percentage of germination was ascertained in 14 d intervals, on 3 x 50 caryopses at 25 °C and short day conditions. The rate of increase of gerniination during dormancy termination (0.5-2.0 % per day) and time to 50% germination (92-208 days) varied between local populations. The latter was positively but weakly correlated with the incidence of primary dormancy in the populations. Genetic differences may contribute to local variation in seed dormancy, being probably favoured by the-self-pollinating reproduction of barnyard grass.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Alois Honek, Zdenka Martinkova

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
general biology - morphology - evolution

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Echinochloa crus-galli (weed)		Czech Republic