Variation in architectural and clonal growth traits within the seed population of white clover (Trifolium repens L.) in a Trifolium repens-Zoysia japonica sward
1996
Sawada, H. (Shizuoka Univ. (Japan). Faculty of Agriculture) | Oginosako, Z. | Yamashita, M. | Fukuda, E.
In a Trifolium repens - Zoysia japonica sward, new members of T. repens recruit frequently via seed reproduction into the adult population. In this paper, we assessed the amounts and patterns of genetic variations in architectural and clonal growth traits within the seed population of T. repens to understand how much variations are potential supplied via seed reproduction to the adult population. Inter-relationships between these traits, especially those between stolon attributes were also examined. Thirty-six clones derived from the seeds were assessed for thee traits using a common garden technique. The results clearly showed that large intrapopulation variations existed in almost all the traits examined and large differences existed in quality as well as quantity of stolon bank among the clones. Estimation of biomass distributional pattern in stolons according to branching order indicated the presence of a wide variation ranging from lower-ordered clones to higher-ordered ones. Analysis of the relationships between stolon attributes suggested that there would be trade-offs between stolon diameter and either stolon length or number. Ecological significances of these variations in clonal growth traits were discussed in relation to a patchy property of the sward population coexisting with Z. japonica
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