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Growth and fitness of triazine‐susceptible and triazine‐resistant common waterhemp ( Amaranthus tuberculatus var. rudis )
Author(s) -
SOLTANI NADER,
VYN JOSHUA D.,
SWANTON CLARENCE J.,
WEAVER SUSAN,
SIKKEMA PETER H.
Publication year - 2008
Publication title -
weed biology and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 36
eISSN - 1445-6664
pISSN - 1444-6162
DOI - 10.1111/j.1445-6664.2008.00277.x
Subject(s) - biology , greenhouse , biomass (ecology) , agronomy , triazine , horticulture , botany , chemistry , polymer chemistry
Two greenhouse trials were conducted over a 2 year period (2004 and 2005) to compare the relative growth potential and fitness of triazine‐susceptible (TS) and triazine‐resistant (TR) waterhemp biotypes. Waterhemp plants from each biotype were grown in 6 L pots in the greenhouse in a completely randomized design. There was no difference in leaf number, plant height, plant biomass, time to bud or time to flower between the two biotypes. The TR female waterhemp plants produced 30% less reproductive biomass and 39% less seed than the TS biotype. The fitness penalty associated with triazine resistance was related to reproductive capability, not to vegetative growth.