Experimental crosses with genetic distance, divergence time and sample sizes.

Crosses with parental species names, geography (sym = sympatric, allo = allopatric), genetic distance (uncorrected p), and divergence times in million years based on the lower and upper bounds of an internally calibrated, linear clock (using the age of Lake Malawi [30]), and two relaxed non-linear molecular clocks using the cichlid fossil record and the break up of Gondwanaland [31]. For details on these calibrations see Stelkens et al. [12]. The number of families used for the calculation of the different fitness components are shown (fert = fertilization rate, hatch = hatching rate, 14 surv = survival rate until 14 days after hatching, 180 surv = survival rate until 180 days after hatching, cumul = cumulative fitness), and the number of F1 families used to produce F2 (“mixed” indicates one case where we were forced to merge several F1 families before generating F2). Homospecific, non-hybrid crosses are listed in the lower part of the table. Hyphens indicate missing data. The number of families available usually drops with developmental stage because mortality increases with each successive measurement. For some families fitness was measured at later stages but not at earlier stages or vice versa, which is why the number of families is not stable or does not always decrease as the experiment progressed.Experimental crosses with genetic distance, divergence time and sample sizes.本数据集收录实验交配组合的亲本物种名称、地理分布信息（sym = 同域分布（sympatric），allo = 异域分布（allopatric））、遗传距离（未校正p距离（uncorrected p）），以及基于内部校准线性分子钟上下限的分化时间（单位：百万年，以马拉维湖年龄作为校准依据[30]）；同时包含基于慈鲷（cichlid）化石记录与冈瓦纳大陆（Gondwanaland）裂解事件校准的两种松弛非线性分子钟（relaxed non-linear molecular clock）所得的分化时间数据[31]。相关校准细节详见Stelkens等人[12]的研究。本研究列出了用于计算不同适合度组分（fitness components）的家系数量：fert 代表受精率（fertilization rate），hatch 代表孵化率（hatching rate），14 surv 代表孵化后14日存活率，180 surv 代表孵化后180日存活率，cumul 代表累积适合度（cumulative fitness）；同时列出了用于产生F2代的F1家系（F1 family）数量（标注"mixed"表示1例需在生成F2代前合并多个F1家系的特殊情况）。同种非杂交交配组合列于表格下半部分，短横线代表缺失数据。可用家系数量通常随发育阶段推进而减少，这是因为每一次后续检测都会伴随死亡率上升。部分家系仅在后期阶段完成了适合度检测，而非早期；反之亦然，这正是家系数量并非恒定，或未随实验推进持续减少的原因。本数据集涵盖携带遗传距离、分化时间与样本量信息的实验交配组合。