Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6374554 | Field Crops Research | 2016 | 12 Pages |
Abstract
A model of the lodging process has been successfully adapted for use on spring wheat grown in North-West Mexico (NWM). The lodging model was used to estimate the lodging-associated traits required to enable spring wheat grown in NWM with a typical yield of 6 t haâ1 and plant height of 0.7 m to achieve a lodging return period of 25 years. Target traits included a root plate spread of 51 mm and stem strength of the bottom internode of 268 N mm. These target traits increased to 54.5 mm and 325 N mm, respectively, for a crop yielding 10 t haâ1. Analysis of multiple genotypes across three growing seasons enabled relationships between both stem strength and root plate spread with structural dry matter to be quantified. A NWM lodging resistant ideotype yielding 6 t haâ1 would require 3.93 t haâ1 of structural stem biomass and 1.10 t haâ1 of root biomass in the top 10 cm of soil, which would result in a harvest index (HI) of 0.46 after accounting for chaff and leaf biomass. A crop yielding 10 t haâ1 would achieve a HI of 0.54 for 0.7 m tall plants or 0.41 for more typical 1.0 m tall plants. This study indicates that for plant breeders to achieve both high yields and lodging-proofness they must either breed for greater total biomass or develop high yielding germplasm from shorter crops.
Keywords
Related Topics
Life Sciences
Agricultural and Biological Sciences
Agronomy and Crop Science
Authors
F.J. Piñera-Chavez, P.M. Berry, M.J. Foulkes, M.A. Jesson, M.P. Reynolds,