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

By F. Piñera-Chávez, P. Berry, M. J. Foulkes, Michael A. Jesson, Matthew P Reynolds. 2016

85 citations recorded by the source corpus.

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.

Subfields: Agronomy and Crop Science, Plant Science

View Paper: https://www.semanticscholar.org/paper/5ce351fe99c9090f89efa47dd21ba4235561819e

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Citations in the corpus

Optimizing dry-matter partitioning for increased spike growth, grain number and harvest index in spring wheat (2019, background): “Reducing DM to internode 2662 and 3 to increase SDM could be aligned with changes in basal internode morphology to maintain663 minimum requirements for a lodging-proof plant (Piñera-Chavez et al. 2016).”