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

This Article Full Text (PDF) 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 ISI Web of Science (3) Citing Articles via Google Scholar Google Scholar Articles by McQuinn, S. D. Articles by Krause, G. F. Search for Related Content PubMed Articles by McQuinn, S. D. Articles by Krause, G. F. Agricola Articles by McQuinn, S. D. Articles by Krause, G. F.

Genetic Variation for Selenium Content in Tall Fescue

Beatrice-Hunt-Wesson, Valparaiso, IN 46383

D. A. Sleper^*, H. F. Mayland and G. F. Krause

Dep. of Agronomy
USDA-ARS, Kimberly, ID 83341
Dep. of Statistics, Univ. of Missouri, Columbia, MO 65211

^* Corresponding author.

Selenium is an element necessary for good animal health. No information is available on inheritance of Se concentration in tall fescue (Festuca arundinacea Shreb.). Therefore, the purpose of this investigation was to determine the nature of genetic variation of Se concentration in tall fescue. To accomplish this objective, 15 parental clones were randomly chosen from a broad-based population, and their half-sib (HS) progenies were generated using a polycross mating design. Selenium analysis was determined flourometrically by digesting dried, ground herbage samples in 3:1 HNO₃/HClO₄. Significant genetic variation was observed among HS families in the fall for Se concentration. Heritability, calculated using parent-offspring (PO) regression, gave estimates of 18% for summer and 68% for the fall. Heritability and genetic gain estimates were maximized in the fall, as compared with the summer, largely because of a large environmental component. Genetic gain, expressed as a percentage of the mean of parents, predicted an advance of 19% for fall herbage. Progress in selecting for improved concentrations of Se in the fall in this population of tall fescue is likely.

Received for publication April 2, 1990.