Avoiding lodging in irrigated spring wheat. I. Stem and root structural requirements

Piñera-Chavez, F.J. and Berry, P.M. and Foulkes, M.J. and Jesson, M.A. and Reynolds, M.P. (2016) Avoiding lodging in irrigated spring wheat. I. Stem and root structural requirements. Field Crops Research, 196 . pp. 325-336. ISSN 1872-6852

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Available under Licence Creative Commons Attribution Non-commercial No Derivatives.
Download (632kB) | Preview

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 ha−1 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 ha−1. 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 ha−1 would require 3.93 t ha−1 of structural stem biomass and 1.10 t ha−1 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 ha−1 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.

Item Type: Article
Keywords: Spring wheat; Lodging-proof ideotype; Stem strength; Anchorage strength; Root plate spread; Grain yield; Stem biomass
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Biosciences > Division of Plant and Crop Sciences
Identification Number: 10.1016/j.fcr.2016.06.009
Depositing User: Eprints, Support
Date Deposited: 13 Sep 2017 10:04
Last Modified: 14 Oct 2017 08:40
URI: http://eprints.nottingham.ac.uk/id/eprint/45975

Actions (Archive Staff Only)

Edit View Edit View