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Root architecture simulation improves the inference from seedling root phenotyping towards mature root systems.

Abstract：

:Root phenotyping provides trait information for plant breeding. A shortcoming of high-throughput root phenotyping is the limitation to seedling plants and failure to make inferences on mature root systems. We suggest root system architecture (RSA) models to predict mature root traits and overcome the inference problem. Sixteen pea genotypes were phenotyped in (i) seedling (Petri dishes) and (ii) mature (sand-filled columns) root phenotyping platforms. The RSA model RootBox was parameterized with seedling traits to simulate the fully developed root systems. Measured and modelled root length, first-order lateral number, and root distribution were compared to determine key traits for model-based prediction. No direct relationship in root traits (tap, lateral length, interbranch distance) was evident between phenotyping systems. RootBox significantly improved the inference over phenotyping platforms. Seedling plant tap and lateral root elongation rates and interbranch distance were sufficient model parameters to predict genotype ranking in total root length with an RSpearman of 0.83. Parameterization including uneven lateral spacing via a scaling function substantially improved the prediction of architectures underlying the differently sized root systems. We conclude that RSA models can solve the inference problem of seedling root phenotyping. RSA models should be included in the phenotyping pipeline to provide reliable information on mature root systems to breeding research.

journal_name

J Exp Bot

journal_title

Journal of experimental botany

authors

Zhao J,Bodner G,Rewald B,Leitner D,Nagel KA,Nakhforoosh A

doi

10.1093/jxb/erw494

subject

Has Abstract

pub_date

2017-02-01 00:00:00

pages

965-982

issue

5

eissn

0022-0957

issn

1460-2431

pii

2972194

journal_volume

68

pub_type

杂志文章

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