Optimal flowering strategy in racemes

我分析了当使用固定数量的储备连续生产多个这样的后代时，后代的大小-数量权衡的性质。在该模型中，我们考虑了后代从母体组织吸收资源的速率和维持呼吸所造成的资源损失的汇限制。我们发现，一个群体的起始时间越晚，产生具有相同规模和后代数量的群体的成本就越大。这是由于从繁殖开始到群体形成期间维持呼吸所造成的资源损失。此外，额外成本随着特定维持呼吸速率的增加而增加。因此，随着时间的推移，因呼吸作用而损失的资源降低了生产后期队列的适应度值。因此，同时生产所有的后代是有利的，除非有适合度优势的顺序生产后代克服了这种成本或限制同时生产。如果对每个群体的后代数量有限制，那么后代生产就会按顺序进化。

I analyzed the nature of size-number trade-off of offspring when multiple cohorts of such offspring are produced sequentially using a fixed amount of reserves. In the model, we incorporated sink-limitation in the resource absorption rate of offspring from the mother tissue and the loss of resources by maintenance respiration. We found that the later the initiation of a cohort, the greater the cost of producing a cohort with the same size and number of offspring. This is due to the loss of resources by maintenance respiration during the period from the beginning of reproduction to the initiation of the cohort. Also, the extra cost increases with an increase in the specific maintenance respiration rate. Thus, resources lost to respiration over time reduces the fitness value of producing late cohorts. Hence, it is advantageous of produce all offspring simultaneously unless there are fitness advantages of producing offspring sequentially which overcome this cost or constraints preventing simultaneous production. Sequentially offspring production evolves if there is a constraint on the number of offspring of each cohort.