Fig. 6.

Best-parent heterosis (BPH) ratios for fruit yield, count, weight, firmness, total soluble solids (TSS), TA, TSS/TA, and ANC among 469 strawberry hybrids grown in Salinas, California field experiments in 2017–2018 and 2018–2019, where $({\overline{y}}_{F1}-{\overline{y}}_{BP})/{\overline{y}}_{BP}$ in the BPH ratio, ${\overline{y}}_{BP}$ is the estimated marginal mean (EMM) for the best parent, and ${\overline{y}}_{F1}$ is the EMM for the hybrid. Contrasts between hybrid and best-parent EMMs ($\text{BPH}={\overline{y}}_{F1}-{\overline{y}}_{BP}$) were estimated for every best parent–hybrid combination. The best parent for an $\text{elite}\times \text{elite}$ hybrids was the parent with the largest EMM, whereas the best parent for an elite × exotic hybrids was the elite parent. The exotic parents were “Puget Reliance”, “Oso Flaco”, and “Del Norte”. BPH ratios in the negative range are shown in gray, whereas BPH ratios in the positive range are shown in red.