HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Walker, C. Articles by Kidwell, K. Search for Related Content PubMed Articles by Walker, C. Articles by Kidwell, K. Agricola Articles by Walker, C. Articles by Kidwell, K. Related Collections Seed Quality Wheat

Using the Solvent Retention Capacity Test When Breeding Wheat for Diverse Production Environments

^a Dep. of Crop and Soil Sciences, Washington State Univ., 219 Johnson Hall, Pullman, WA, 99164-6420
^b USDA-ARS, Wheat Genetics, Wheat Genetics, Quality, Physiology, and Disease Research Unit, 209 Johnson Hall, Pullman, WA 99164-6420
^c Decagon Devices, 950 NE Nelson Ct., Pullman, WA 99163

^* Corresponding author (kidwell{at}wsu.edu).

The solvent retention capacity (SRC) test is used to predict commercial baking performance of soft wheat (Triticum aestivum L.) by measuring the capacity of flour to retain each of four solvents—water, Na₂CO₃, sucrose, and lactic acid—to assess overall absorption capacity, starch damage, pentosan and gliadin content, and glutenin quality, respectively. Our objectives were to determine sources of variation in the test, repeatability, and optimum scale and resource allocation needed to maximize efficiency. Duplicate SRC tests were conducted for each solvent using two flour sample sizes (5 and 0.2 g) from two field replications of each of 8 soft white spring and 16 soft white winter genotypes grown in five and three environments, respectively. We conducted ANOVAs and used variance components to assess the consistency with which genotypic differences were detected. The interactions of genotype x environment and genotype x field replication within environment were significant (P < 0.05) for most solvent and sample weight combinations. Repeatability values were high and consistent for all solvents (0.86–0.96) when 5-g samples were used, indicating that selection based on any solvent should result in gains from selection at this scale. Only lactic acid and sucrose were accurately predictive at the 0.2-g scale, limiting its utility. Repeatability values improved with increased numbers of environments, field replications, or laboratory replications; however, this may be cost prohibitive when evaluating early-generation breeding material on a large scale, especially since the magnitude of increase in predictability diminished with each additional unit.

Abbreviations: AACC, American Association of Cereal Chemists • E, environment • F(E), field replication within environment • G, genotype • L[GxF(E)], lab replication within the interaction of genotype and field replication within environment • SRC, solvent retention capacity

All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permission for printing and for reprinting the material contained herein has been obtained by the publisher.

Received for publication June 19, 2007.