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 (2) Citing Articles via Google Scholar Google Scholar Articles by Jan, C. C. Articles by Fick, G. N. Search for Related Content PubMed Articles by Jan, C. C. Articles by Fick, G. N. Agricola Articles by Jan, C. C. Articles by Fick, G. N. Related Collections Sunflower Crop Genetics

CROP BREEDING, GENETICS & CYTOLOGY

Inheritance of Fertility Restoration for Two Cytoplasmic Male Sterility Sources of Helianthus pauciflorus (rigidus) Nutt.

^a USDA-ARS, Northern Crop Science Laboratory, P.O. Box 5677, Fargo, ND 58105
^b Monsanto Seed Group, 2111 Piilani Highway, P.O. Box 645, Kihei, HI 96753
^c Seeds 2000, Inc., Breckenridge, MN 56520

* Corresponding author (janc{at}fargo.ars.usda.gov)

New sources of cytoplasmic male sterility (cms) and fertility restoration genes would reduce the genetic vulnerability of commercial sunflower (Helianthus annuus L.) hybrids because of the current use of a single male sterile H. petiolaris Nutt. cytoplasm and a few fertility restoration genes. The objectives of this study were to evaluate the inheritance of fertility restoration, to compare the cytoplasmic similarity between the two cms sources, and to confirm the vigor reducing effect of combining perennial species cytoplasms with cultivated nuclei. Cms-RMX plants, maintained by backcrossing with inbred line HA89, were crossed with 21 prospective restoration lines. Male-fertile F₁ progeny were observed in crosses with ‘Luch’ and ‘RCMG1’. Segregation of male sterility in F₂ and testcrosses with HA89 indicated fertility restoration was controlled by two complementary dominant genes. Identical segregation ratios of male fertile to male sterile in both F₂ and testcross F₁ were obtained with cms-RIG1 using the fertility restoration genes identified for cms-RIGX. These results suggest a single origin of the two cms sources. In a field test, cms-RIGX plants produced no seeds after self-pollination, and 99% seed set from open-pollination, indicating complete male sterility and female fertility. The new cms-RIG sources and corresponding fertility restoration genes will provide cytoplasmic diversity for sunflower hybrid production.

This article has been cited by other articles:

				V. A. Dalvi, K. B. Saxena, I. A. Madrap, and V. K. Ravikoti Cytogenetic Studies in A4 Cytoplasmic-Nuclear Male-Sterility System of Pigeonpea J. Hered., July 24, 2008; (2008) esn056v1. [Abstract] [Full Text] [PDF]

				V. A. Dalvi, K. B. Saxena, and I. A. Madrap Fertility Restoration in Cytoplasmic-Nuclear Male-Sterile Lines Derived from 3 Wild Relatives of Pigeonpea J. Hered., May 20, 2008; (2008) esn034v1. [Abstract] [Full Text] [PDF]