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 Cutter, G. L. Articles by Bingham, E. T. Search for Related Content PubMed Articles by Cutter, G. L. Articles by Bingham, E. T. Agricola Articles by Cutter, G. L. Articles by Bingham, E. T.

Effect of Soybean Male-Sterile Gene ms₁ on Organization and Function of the Female Gametophyte¹

The female gametophyte of genetic male-sterile soybeans [Glycine max (L.) Merr.] (ms₁ ms₁) was examined histologically to gain insight into the association of the ms₁ gene with polyembryony, haploidy, and polyploidy. Embryo sacs on the day of flowering appeared normal in only 28% of 225 male-sterile ovules examined. The most common abnormality was supernumerary nuclei in the regions of the secondary nucleus and egg apparatus. It was concluded that these nuclei could arise by proliferation of nuclei during embryo sac development. Presence of supernumerary nuclei and their restitution products provides an explanation for polyembryony, haploids, and polyploids found among male-sterile progeny. Ovules without an embryo sac occurred at a frequency of 11 and 12% in male-sterile and normal fertile plants, respectively. Only one-fourth of the embryo sacs of male-sterile plants examined at 3 to 4 days post-pollination contained an embryo, which agreed with the 29% normal embryo sacs observed before pollination. This also provides an explanation for the single-seeded pods and the reduced seed set associated with the male-sterile ms₁ ms₁ plants.

Key Words: Glycine max (L.) Merr • Haploid • tripload • Fertility • Supernumerary nuclei • twinning • Embryo sac

² Research geneticist, Cargill, Inc., P.O. Box 245, Seward, NE 68434, and professor, Dep. of Agronomy, Univ. of Wisconsin, Madison, WI 53706.

Received for publication May 18, 1976.

This article has been cited by other articles:

				S.J. Xu, R.J. Singh, K.P. Kollipara, and T. Hymowitz Hypertriploid in Soybean: Origin, Identification, Cytology, and Breeding Behavior Crop Sci., January 1, 2000; 40(1): 72 - 77. [Abstract] [Full Text]