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

Pi�era-Chavez, F.J.; Berry, P.M.; Foulkes, M.J.; Jesson, M.A.; Reynolds, M.P.

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.

Citation

Piñera-Chavez, F., Berry, P., Foulkes, M., Jesson, M., & Reynolds, M. (2016). Avoiding lodging in irrigated spring wheat. I. Stem and root structural requirements. Field Crops Research, 196, https://doi.org/10.1016/j.fcr.2016.06.009

• Journal Article Type: Article
• Acceptance Date: Jun 16, 2016
• Online Publication Date: Jun 30, 2016
• Publication Date: Sep 30, 2016
• Deposit Date: Sep 13, 2017
• Publicly Available Date: Sep 13, 2017
• Journal: Field Crops Research
• Print ISSN: 0378-4290
• Electronic ISSN: 1872-6852
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 196
• DOI: https://doi.org/10.1016/j.fcr.2016.06.009
• Keywords: Spring wheat; Lodging-proof ideotype; Stem strength; Anchorage strength; Root plate spread; Grain yield; Stem biomass
• Public URL: https://nottingham-repository.worktribe.com/output/808629
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0378429016301873?via%3Dihub