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

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in Crop Science 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 (1) Citing Articles via Google Scholar Google Scholar Articles by Rojas-Barros, P. Articles by Fernández-Martínez, J. M. Search for Related Content PubMed Articles by Rojas-Barros, P. Articles by Fernández-Martínez, J. M. Agricola Articles by Rojas-Barros, P. Articles by Fernández-Martínez, J. M. Related Collections Crop Genetics Other Oil Crops

CROP BREEDING, GENETICS & CYTOLOGY

Inheritance of High Oleic/Low Ricinoleic Acid Content in the Seed Oil of Castor Mutant OLE-1

Instituto de Agricultura Sostenible (CSIC), Apartado 4084, E-14080 Córdoba, Spain

^* Corresponding author (cs9femaj{at}uco.es).

A mutant line of castor (Ricinus communis L.), OLE-1, was recently identified. It has a 20-fold increase in oleic acid (C18:1, about 780 g kg^–1) and a six-fold decrease in ricinoleic acid content (C18:1-OH, about 140 g kg^–1) compared with standard castor oil (C18:1, about 40 g kg^–1; C18:1-OH, about 870 g kg^–1). The objective of this research was to determine the inheritance of the high oleic/low ricinoleic trait in this mutant. Reciprocal crosses were made between the mutant OLE-1 and castor line A74/18/10 with standard composition. Although a slight maternal effect for oleic and ricinoleic content was observed in the analysis of F₁ seeds, the genetic control was mainly embryonic. The standard oleic/ricinoleic content was dominant over high oleic/low ricinoleic content. Oleic acid content of F₂ seeds segregated in bimodal patterns, each consistent with a ratio of 13 to 3 for low-intermediate oleic content (<110 g kg^–1) to high oleic content (>650 g kg^–1), respectively. This segregation was consistent with the action of two independent major genes (ol, Ml) with epistatic interaction. The high oleic/low ricinoleic phenotype was homozygous for the genotypes with the recessive allele ol, and heterozygous or homozygous for the dominant allele Ml. The dominant allele Ml would release the action of the recessive allele ol, controlling the oleic and ricinoleic content. This model was confirmed in the BC₁F₁ to OLE-1, which segregated following a 1:1 (low-intermediate:high) ratio, and F₃ segregations. The information provided by this genetic study will facilitate the transfer of the high oleic/low ricinoleic trait to castor cultivars.

Abbreviations: GLC, gas–liquid Chromatography

Related articles in Crop Science:

THIS ISSUE IN CROP SCIENCE

Crop Science 2005 45: xi. [Full Text]