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 Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Knapp, S. J. Articles by Slabaugh, M. B. Search for Related Content PubMed Articles by Knapp, S. J. Articles by Slabaugh, M. B. Agricola Articles by Knapp, S. J. Articles by Slabaugh, M. B.

Cuphea viscosissima Mutants with Decreased Capric Acid

Dep. of Crop and Soil Science, Oregon State Univ., Corvallis, OR 97331
Pioneer Hi-Bred Intl., P.O. Box 1004, Johnston, IA 50131

^* Corresponding author (knapps{at}css.orst.edu).

The range of medium-chain oils produced by Cuphea viscosissima Jacq., a naturally rich source of capric acid (10:0), can be broadened by developing lines with increased caprylic (8:0), lauric (12:0), myristic (14:0) acid. Our objectives were to (i) describe the inheritance of a series of mutants with decreased 10:0 (CPR-1, CPR-2, CPR-4, CPR-5, and CLM-1) and (ii) develop lines with fatty acid compositions different from other mutant lines. CPR-1, CPR-2, and CPR-5 had ~310 g kg^-1 less 10:0 than the wild type (WT), whereas CPR-4 had 62 g kg^-1 less 10:0 and CLM-1 had 50 g kg^-1 less 10:0 than the wild type. We assayed the fatty acids of 100 progeny from 10 F₂ populations segregating for one or more mutations. CPR-1, CPR-2, and CPR-5 produced three non-overlapping capric acid classes and segregated as single incompletely dominant mutations. CPR-1 x CPR-2 and CPR-1 x CPR-5 F₂ progeny had continuous 8:0 and 10:0 distributions. The CPR-1 x CPR-5 cross produced several F₂ progeny with atypical 8:0 and 10:0 phenotypes, while the CPR-1 x CPR-2 cross produced no F₂ progeny different from either parent. CPR-1 and CPR-2 seem to be allelic mutations affecting the cpr locus. CPR-5 could be an allele of the cpr locus or of a locus tightly linked to cpr. CPR-4 x WT and CLM-1 x WT F₂ progeny had continuous 10:0 distributions. CPR-1, CPR-4, and CLM-1 seem to be non-allelic mutations. VS-320, an F₃ line developed from the CPR-1 x CLM-1 F₂ population, had 334 g kg^-1 8:0 and 396 g kg^-1 10:0. VS-321, an F₃ line developed from the CPR-4 x CPR-5 F₂ population, had 247 g kg^-1 8:0 and 361 g kg^-1 10:0. The 8:0 or 10:0 contents of these lines are lower or higher than previously reported for C. viscosissima.

Received for publication July 31, 1995.

This article has been cited by other articles:

				F. Forcella, R. W. Gesch, and T. A. Isbell Seed Yield, Oil, and Fatty Acids of Cuphea in the Northwestern Corn Belt Crop Sci., September 23, 2005; 45(6): 2195 - 2202. [Abstract] [Full Text] [PDF]