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 Yermanos, D. M. Articles by Gill, K. S. Search for Related Content PubMed Articles by Yermanos, D. M. Articles by Gill, K. S. Agricola Articles by Yermanos, D. M. Articles by Gill, K. S.

Induction of Polyploidy in Linum Species¹

Colchicine was evaluated at six concentrations (0.0125, 0.025, 0.05, 0.1, 0.2, and 0.4% in water) for the induction of polyploidy. Three Linum species, L. usitatissimum (var. ‘Imperial’ and ‘Abyssinian yellow’), L. angustiSolium, and L. narbonense, were treated at different stages of development. The most effective treatment was 0.1% colchicine for 6 hours on germinating seedlings. Effectiveness of the treatments depended on species, concentration, duration of application, and duration X concentration interaction. Polyploids could be identified 3 weeks after treatment by their increased stomata size and later by their larger flower, seed, and pollen grain size.

Meiotic behavior was studied in auto-tetraploids of L. usitatissimum, L. angustifolium, L. africanum, L. altaicure, L. grandifiorum, L. maritimum~ L. narbonense, L. rigidum, and L. tenuifolium. A high frequency of quadrivalents was formed by all species at meiosis involving 33 to 71% of the chromosome complement. Chlasmata frequency in tetraploids was lower than in diploids. Pollen viability and number of seeds per capsule were lower in all auto-tetraploids, but seed and capsule size were larger. Oil content and degree of unsaturation were lower in tetraploids, while moisture content of the seed was higher.

Key Words: chemically induced polyploidy • pollen and polyploidy • seed oil and polyploidy • polyploid identification

² Associate Professor, Department of Agronomy, University of California, Riverside, and graduate student (present address: Professor of Genetics, Punjab Agricultural College, Hissar, Punjab, India).

Received for publication November 21, 1966.

This article has been cited by other articles:

				A. J. Jhala, L. M. Hall, and J. C. Hall Potential Hybridization of Flax with Weedy and Wild Relatives: An Avenue for Movement of Engineered Genes? Crop Sci., May 1, 2008; 48(3): 825 - 840. [Abstract] [Full Text] [PDF]