Elle Elizabeth
Program in Ecology and Evolution, Rutgers University, 08855-1059, Piscataway, NJ, USA.
Oecologia. 1996 Mar;107(1):61-70. doi: 10.1007/BF00582235.
Patterns of resource allocation to growth, current reproduction, and potential future reproduction were quantified in six genetically distinct cultivars ofVaccinium macrocarpon. For all cultivars (genotypes), vegetative size is positively correlated with some measures of current reproduction (fruit and flower number) but negatively correlated with others (seed number per fruit, seed weight per fruit). Vegetative growth in the current year is significantly related to the production of reproductive terminal buds, a measure of the potential for reproduction in the following year. Stems with low levels of current reproduction - lower flower number, fruit number, and seed weight - were more likely to form reproductive terminal buds than stems with higher levels of current reproduction. Individual genotypes differed significantly for vegetative size, fruit number, fruit weight, seed number, and seed weight, as well as for the frequency of fruiting stems and reproductive terminal buds produced. Genotypes were segregated in principal component space, indicating overall differences between them in allocation to the suite of variables measured. These results indicate the possibility of fitness differences among cultivars due to genetically determined allocation strategy, which has implications for fitness differences among genotypes within natural populations.
对六种遗传上不同的大果越橘品种的资源分配模式进行了量化，这些资源分配到生长、当前繁殖和潜在的未来繁殖方面。对于所有品种（基因型），营养体大小与当前繁殖的一些指标（果实和花的数量）呈正相关，但与其他指标（每个果实的种子数、每个果实的种子重量）呈负相关。当年的营养生长与生殖顶芽的产生显著相关，生殖顶芽是衡量次年繁殖潜力的一个指标。当前繁殖水平较低的茎——花数、果实数和种子重量较低——比当前繁殖水平较高的茎更有可能形成生殖顶芽。个体基因型在营养体大小、果实数、果实重量、种子数和种子重量以及结果茎的频率和产生的生殖顶芽方面存在显著差异。基因型在主成分空间中被分离，表明它们在对所测量的一系列变量的分配上存在总体差异。这些结果表明，由于遗传决定的分配策略，品种之间可能存在适合度差异，这对自然种群内基因型之间的适合度差异具有影响。
