Genome size variation and basic chromosome number in pearl millet and fourteen related Pennisetum species
Article Abstract:
Flow cytometry was done to determine the genome size and base composition of 15 Pennisetum species representing different basic chromosome numbers and different ploidy levels. It was found that genome sizes are variable among the species examined and that there is a positive relationship between basic chromosome number and haploid genome size when chromosome number increases from five to seven. Conversely, among species with seven, eight or nine chromosome number, the relationship was observed to be negative. It was also deduced from the results that chromosome repatterning occurs during evolution within the genus which entail changes in chromosome size with subsequent loss or gain of DNA sequences.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
Reproduction, cytology, and fertility of pearl millet x Pennisetum squamulatum BC4 plants
Article Abstract:
Apomictic asexual reproduction that allows true-breeding hybrid production has a high potential for improving world food and feed production. Noncultivated wild species of millet possess the genes that control obligate apomixis. In a program designed to transfer genes controlling apomixis from Pennisetum squamulatum with 54 chromosomes to cultivated pearl millet Pennisetum glaucum with 28 chromosomes, progenies were established from seven apomictic backcross BC4 plants. The highly apomictic plants had 27 or 29 chromosomes and a derivative from such a plant had 28 chromosomes and a telocentric fragment.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1993
User Contributions:
Comment about this article or add new information about this topic:
Pennisetum squamulatum: Is the predominant cytotype hexaploid or octaploid?
Article Abstract:
A study was conducted to examine the accession of Pennisetum squamulatum. Results showed that Pennisetum squamulatum is most likely octapoid with a basic chromosome number of seven (2n = 8x = 56) and might belong to the secondary gene pool of Pennisetum.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Coordinate regulation of an extended chromosome domain. The clearance mechanism of chilled blood platelets. Positions of potential: nuclear organization and gene expression
- Abstracts: Ordered recruitment of transcription and chromatin remodeling factors to a cell cycle - and developmentally regulated promoter
- Abstracts: Preferential male transmission of an alien chromosome in wheat. A linkage map of seven allozyme loci in the Hessian fly
- Abstracts: Identification of the sources of energy for nitrogen fixation and physiological characterization of nitrogen-fixing members of a marine microbial mat community
- Abstracts: Influence of immigration on epiphytic bacterial populations on navel orange leaves. Novel method for identifying bacterial mutants with reduced epiphytic fitness