Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Gonzalez, B.
Right arrow Articles by Hanna, W. W.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Gonzalez, B.
Right arrow Articles by Hanna, W. W.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

The Journal of Heredity 1984:75(4):317-318
© 1984 The American Genetic Association 75:317-318

other

Morphological and fertility responses in isogenic triploid and hexaploid pearl millet × napiergrass hybrids

Boldomero Gonzalez, and Wayne W. Hanna

U.S. Department of Agricullure-ARS
U.S. Department of Agriculture-ARS, and University of Georgia College of Agriculture Experiment Stations, Coastal Plain Experiment Station, Agronomy Department Tifton, GA 31793

Please address reprint requests to Dr. Wayne W. Hanna, USDA-ARS, Coastal Plain Experiment Station, Tifton, GA 31793

Abstract

The effects of polyploidy on 18 morphological and fertility characters were studied in six isogenic Pennisetum americanum (L.) Leeke × P. purpureum, Schum, triplod (3x) and hexaploid (6x) clonal pairs. Four of the characters, inflorescence length and width, floret length, and flag leaf length increased in size for all clones with an increase in ploidy as a result of a dosage effect. Pollen diameter and stainability increased due to a more regular melosis in the hexaploid (AAA'A'AB) compared to the triploid (AA'B) resuiting in functional pollen grains. Differential responses to polyploidy among clones were observed for 12 plant characteristics: stomatal length and frequency on both abaxial and adaxial surfaces, growth rate, tiller number per plant, plant height stem thickness, days to flowering, flag leaf width, spikelet number per 5 cm inflorescence, and florets per spikelet. The different responses by clones are probably due to any one or combination of a dosage effect, gene number controlling a character, genotype of plant, and gone action and interaction both within and between the A and B genomes. This investigation showed the importance of studying a number oh different genotypes when determining the effect of an increase in ploidy level on plant characters.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.