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RESEARCH ARTICLE
Contents Vol 45(1)

Interspecific hybridisation and cytogenetic studies in ornamental sunflower breeding

J. Atlagic A , V. Secerov-Fiser B C and R. Marinkovic A
+ Author Affiliations
- Author Affiliations

A Institute of Field and Vegetable Crops, 21000 Novi Sad, Yugoslavia.

B Faculty of Agriculture, 11080 Zemun, Yugoslavia.

C Present address and corresponding author. 3 Moffatt Street, Goondiwindi, Qld 4390, Australia. Email: fiser13@bigpond.net.au

Australian Journal of Experimental Agriculture 45(1) 93-97 https://doi.org/10.1071/EA01109
Submitted: 1 July 2001  Accepted: 5 April 2004   Published: 21 February 2005

Abstract

This study examined the possibility of using wild sunflower species as a source of desirable genes in breeding the common ornamental sunflower. Crossing 7 wild species with 6 inbred lines of common ornamental sunflower produced F1 hybrid plants only with Helianthus argophyllus and H. petiolaris. The F1’s exhibited the dominant phenotype of the wild species. Cytological analysis showed irregularities in meiosis and low pollen fertility in F1 hybrids. The most frequent configuration was 15 bivalents and 1 quadrivalent and 13 bivalents and 2 quadrivalents. The presence of quadrivalents at diakinesis indicated the occurrence of translocations. In a small percentage of anaphase I meiocytes, chromosome bridges were detected resulting from inversions. The occurrence of translocations and inversions showed the differences in chromosome structure among the crossed species. Helianthus argophyllus and H. petiolaris may be useful in ornamental sunflower breeding as valuable sources of desirable genes.


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