Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/109618
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Floret development and grain setting differences between modern durum wheats under contrasting nitrogen availability |
Author: | Ferrante, A. Savin, R. Slafer, G. |
Citation: | Journal of Experimental Botany, 2013; 64(1):169-184 |
Publisher: | Oxford University Press |
Issue Date: | 2013 |
ISSN: | 0022-0957 1460-2431 |
Statement of Responsibility: | Ariel Ferrante, Roxana Savin and Gustavo A. Slafer |
Abstract: | Wheat yield depends on the number of grains per square metre, which in turn is related to the number of fertile florets at anthesis. The dynamics of floret generation/degeneration were studied in contrasting conditions of nitrogen (N) and water availability of modern, well-adapted, durum wheats in order to understand further the bases for grain number determination. Experiments were carried out during the 2008-2009 and 2009-2010 growing seasons at Lleida (NE Spain). The first experiment involved four cultivars (Claudio, Donduro, Simeto, and Vitron) and two contrasting N availabilities (50 kgN ha⁻¹ and 250 kgN ha⁻¹; N50 and N250) while experiment 2 included the two cultivars most contrasting in grain setting responsiveness to N in experiment 1, and two levels of N (N50 and N250), under irrigated (IR) and rainfed (RF) conditions. In addition, a detillering treatment was imposed on both cultivars under the IR+N250 condition. The number of fertile florets at anthesis was increased by ~30% in response to N fertilization (averaging across treatments and spikelet positions). The effect of N and water availability was evident on floret developmental rates from the third floret primordium onwards, as these florets in the central spikelets of all genotypes reached the stage of a fertile floret in N250 while in N50 they did not. In this study, clear differences were found between the cultivars in their responsiveness to N by producing more fertile florets at anthesis (through accelerating developmental rates of floret primordia), by increasing the likelihood of particular grains to be set, or by both traits. |
Keywords: | Detillering; fertile floret; floret primordia; grain number; grain set; Triticum durum |
Rights: | © 2012 The Authors. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
DOI: | 10.1093/jxb/ers320 |
Published version: | http://dx.doi.org/10.1093/jxb/ers320 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 8 |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
hdl_109618.pdf | Published Version | 2.02 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.