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 McKenzie, W. H. Search for Related Content PubMed Articles by McKenzie, W. H. Agricola Articles by McKenzie, W. H.

Fertility Relationships Among Interspecific Hybrid Progenies of Gossypium¹

The two cultivated New World cottons, Gossypium Hirsulum L. and Gossypium barbadense L., together with four hybrid families comprising a representative range between them were studied to obtain a quantitative measure of the potential for and the realization of reproductivity.

Three of the four hybrid families possessed a greater number ot fertilized ovules per ovary than either of the parent strains. Heterosis was thought to be largely responsible. Hybrid families, however, made less efficient use of their reproductive potential. Families with the greatest mixture of germplasm which correspondingly possessed the greatest number of fertilized ovules per ovary, matured the smallest number of seeds per boll. Selfing brought about an even more drastic reduction in the number of seeds recovered per boll for all of the hybrid families. A smaller, but statistically significant, elimination of hybrid progeny accompanied germination.

Even though the majority of elimination was postzygotic, it was concluded that the relative amount of interspecific recombination occurring during gamete formation could adequately account for the observed reproductive breakdown.

Key Words: Heterosis • Hybrid breakdown • Seed production • Interspecific recombination

² Instructor in Genetics, North Carolina State University, Raleigh, N. C. 27607.

Received for publication March 16, 1970.

This article has been cited by other articles:

				S. Saha, J. N. Jenkins, J. Wu, J. C. McCarty, O. A. Gutierrez, R. G. Percy, R. G. Cantrell, and D. M. Stelly Effects of Chromosome-Specific Introgression in Upland Cotton on Fiber and Agronomic Traits Genetics, March 1, 2006; 172(3): 1927 - 1938. [Abstract] [Full Text] [PDF]