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

This Article Full Text Full Text (PDF) 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 Bregitzer, P. Articles by Whitmore, J. C. Search for Related Content PubMed Articles by Bregitzer, P. Articles by Whitmore, J. C.

CULTIVARS

Registration of ‘Clearwater’ Low-Phytate Hulless Spring Barley

^a USDA-ARS, National Small Grains Germplasm Research Facility, 1691 S. 2700 W., Aberdeen, ID 83210
^b Univ. of Idaho Research and Extension Center, 1693 S. 2700 W, Aberdeen, ID 83210
^c Univ. of Idaho Research and Extension Center, Tetonia, ID 83436

^* Corresponding author (phil.bregitzer{at}ars.usda.gov).

ABSTRACT

‘Clearwater’ (Reg. No. CV-335; PI 647080) is a spring two-rowed barley (Hordeum vulgare L.) developed by the USDA-ARS and the Idaho Agricultural Experiment Station. Clearwater was selected and released on the basis of competitive agronomic performance in combination with low-phytate (LP), hulless grain. Clearwater derives from an BC₁F_3:4 selection from the cross ‘Baronesse’*2/Pmut640//HB317. It was tested under the experimental designation 01ID435H. The parent Pmut640 is a sodium-azide generated mutant induced in the two-rowed malting cultivar Harrington. The mutation conferring reduced phytate in Pmut640 is believed to be allelic to lpa2-1, which results in a reduction of phytate (myo-inositol 1,2,3,4,5,6-hexakisphosphate) of approximately 40 to 50% and an increase in inorganic P of greater than 400%. Studies have shown that these changes are associated with increased feed quality and reduced environmental impacts when fed to non-ruminant animals, based on increased P digestibility and reduced fecal P content.

Abbreviations: LP, low phytate • P_i, inorganic phosphorus • WRDSBN, Western Regional Dryland Spring Barley Nurseries • WRSBN, Western Regional Spring Barley Nurseries