ISHS Acta Horticulturae 545: V International Protea Research Symposium
VARIATION OBSERVED IN SEEDLING POPULATIONS DERIVED FROM SELF-POLLINATION OF PROTEA INTERSPECIFIC HYBRIDS |
| Author: | G.M. Littlejohn |
| Keywords: | breeding, cluster analysis, genetic segregation, recombination |
| Abstract:
Seedling derived plants from interspecific hybrids P. neriifolia/Protea pudens and P. neriifolia/Protea longifolia and a clonal selection of P. neriifolia were grown under standard plantations practices. Measurements of a number of traits were made on three-year old plants and analyzed statistically for the pattern of distribution of the measurements. The analyses indicated significant differences between plants for all traits measured. The full range of plant types between the two parental species was observed in both interspecific hybrid populations, while variation in the P. neriifolia populations was primarily focussed on leaf size and involucral bract color. Clustering of the measurements or observations into the parental types was observed for inflorescence length, floret length, stem mass, inflorescence mass, leaf length, leaf width and concealment of the inflorescence by the leaves in the P. neriifolia/P. longifolia progeny population. However, new combinations of traits, combining characteristics from both parents were observed in both interspecific hybrid progeny populations. Therefore, F2 segregation should provide a worthwhile source of genetic variation in breeding Protea. | |
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