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 Google Scholar Google Scholar Articles by Turcotte, E. L. Articles by Feaster, C. V. Search for Related Content PubMed Articles by Turcotte, E. L. Articles by Feaster, C. V. Agricola Articles by Turcotte, E. L. Articles by Feaster, C. V.

The Origin of 2n and n Sectors of Chimeral Pima Cotton Plants

The tetraploid tissue of American Pima cotton (Gossypium barbadense L.) plants chimeral for tetraploid and haploid tissues was found to be of hybrid origin. We crossed 57-4, a doubled haploid that is semigametic, as female, with a multiple-marked stock homozygous for glandless and heterozygous for red plant color. A number of the plants from this cross were chimeral for glanded or glandless tissue, red or green tissue, and tetraploid or haploid tissue. The combinations of tissues in tri-chimeral plants were such that polyspermy appeared to be involved in the development of their tetraploid tissue. We theorized that a sperm nucleus divided in the egg cell before fertilization. The semigametic tendency of the female parent may be associated with the stimulation of divisions of the sperm nucleus.

Key Words: Amphidiploid • Chimeral • Gossyplum barbadense L. • Haploid • Polyspermy • Semigamy • Tetraploid

² Research Geneticist and Research Agronomist, ARS, USDA, University of Arizona Cotton Research Center, Phoenix, Ariz. 85040.

Received for publication August 16, 1972.