drcSeedGerm (version 1.0.1)

rape2G: Germination data from an assay of rapeseed at decreasing water potential levels

Description

This files describes the germination of rapeseed (cv. Excalibur and Toccata) at different water potential levels in the substrate.

Usage

data("rape")

Format

A data frame with 294 observations on the following 8 variables.

CV

a factor: rape genotype

Psi

a numeric vector: waterpotential level

Dish

a numeric vector: code for Petri dishes

timeBef

a numeric vector: beginning of scoring interval

timeAf

a numeric vector: end of scoring interval

nSeeds

a numeric vector: number of germinated seeds, between timeBef and timeAf

nCum

a numeric vector: cumulative number of germinated seeds at timeAf

Prop

a numeric vector: cumulative proportion of germinated seeds at timeAf

References

Pace, R., Benincasa, P., Ghanem, M.E., Quinet, M., Lutts, S., 2012. Germination of untreated and primed seeds in rapeseed (Brassica napus var. oleifera Del.) under salinity and low matric potential. Experimental Agriculture 48, 238–251.

Examples

#Fitting a hydrotime-to-event model
data(rape2G)
modHTE <- drmte( nSeeds ~ timeBef + timeAf + Psi,
            data=rape2G, fct=HTE1(),
            curveid = CV)
summary(modHTE)