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

This Article Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (6) Citing Articles via Google Scholar Google Scholar Articles by Cervantes-Martinez, C. T. Articles by Holland, J. B. Search for Related Content PubMed Articles by Cervantes-Martinez, C. T. Articles by Holland, J. B. Agricola Articles by Cervantes-Martinez, C. T. Articles by Holland, J. B. Related Collections Other Grain Crops Crop Genetics

CROP BREEDING, GENETICS & CYTOLOGY

Correlated Responses to Selection for Greater ß-Glucan Content in Two Oat Populations

^a Univ. Autonoma Chapingo, Carretera Mexico-Texcoco km 38.5, Texcoco, Edo. de Mex., Mexico 56230
^b Dep. of Food Science and Human Nutrition, Iowa State Univ., Ames, IA 50011
^c USDA-ARS, National Small Grains Germplasm Research Facility, P.O. Box 307, Aberdeen, ID 83210
^d USDA-ARS Plant Science Research Unit, Dep. of Crop Science, Box 7620, North Carolina State Univ., Raleigh, NC 27695-7620

* Corresponding author (james_holland{at}ncsu.edu)

Oat (Avena sativa L.) ß-glucan lowers serum cholesterol in humans. Thus, enhancing its content in oat cultivars for human consumption is desirable. Phenotypic selection for greater ß-glucan content was effective in two broad-based oat populations, BG1 and BG2. The initial and selected cycles of each of these populations were evaluated in 1996 and 1997 at two Iowa locations to determine the correlated responses of agronomic and grain quality traits to selection for greater ß-glucan content. Correlated responses were generally unfavorable for agronomic performance, but favorable in terms of human nutritional value of oat grain. Mean protein content increased by 5% in one population while mean oil content and heading date did not change. Mean grain yield, biomass, and test weight were reduced by 25, 23, and 2%, respectively, in one population and not affected in the other. Plant height decreased by 5% in one population only. Genotypic variances were unchanged by selection, except the genetic variance for plant height in BG2 increased. Selection strengthened negative genotypic correlations between ß-glucan content and grain yield, biomass, and oil content in both populations, and between ß-glucan content and test weight, heading date, and height in one population. ß-Glucan yield (the product of ß-glucan content and grain yield) was positively genotypically correlated with both grain yield (r = 0.92 in both populations) and ß-glucan content (r = 0.66 and r = 0.26 in the two populations). Selection for greater ß-glucan yield could be used to improve ß-glucan content and grain yield simultaneously.

Abbreviations: BLUP, best linear unbiased predictor • h², heritability • NIRS, near-infrared reflectance spectroscopy • NMR, nuclear magnetic resonance • PI, plant introduction • REML, restricted maximum likelihood • SEC, standard error of calibration

This article has been cited by other articles:

				R. Redaelli, D. Sgrulletta, G. Scalfati, E. De Stefanis, and P. Cacciatori Naked Oats for Improving Human Nutrition: Genetic and Agronomic Variability of Grain Bioactive Components Crop Sci., June 26, 2009; 49(4): 1431 - 1437. [Abstract] [Full Text] [PDF]

				A. A. Chernyshova, P. J. White, M. P. Scott, and J.-L. Jannink Selection for Nutritional Function and Agronomic Performance in Oat Crop Sci., November 7, 2007; 47(6): 2330 - 2339. [Abstract] [Full Text] [PDF]

				J. Long, J. B. Holland, G. P. Munkvold, and J.-L. Jannink Responses to Selection for Partial Resistance to Crown Rust in Oat Crop Sci., April 25, 2006; 46(3): 1260 - 1265. [Abstract] [Full Text] [PDF]