Breeding for weed management

Document Type

Article

Publication Date

7-1-2012

Abstract

The highly adaptive and multiplying capacities of weeds are defining characteristics that are useful in perpetuating these species in various environmental conditions. However, the physiological bases that explain these advantages are complex and have not been fully elucidated. With the introduction of transgenic cultivars, other concerns have been attributed to weeds, due to the possibility of gene flow between crops and invasive species. This gene flow can change the fitness of the latter, both for biotic and abiotic factors, thereby generating significant changes in the invasive species' rusticity, invasiveness, and competitiveness, making them stronger colonizers. Given these findings, many recent studies have examined cultivars' ability to compete with weeds. This chapter addresses competition theories between crops and weeds, several physiological bases for stress caused by competition for resources needed for plant growth and improvement strategies adopted to obtain cultivars with greater competitive abilities.

Publication Source (Journal or Book title)

Plant Breeding for Biotic Stress Resistance

First Page

137

Last Page

164

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