Table 1.

The effect of inbreeding on fruit yield and quality traits within the California population.

Trait	${\overline{\mathbf{y}}}_{{\mathbf{S}}_{\mathbf{0}}}$	${\overline{\mathbf{y}}}_{{\mathbf{S}}_{\mathbf{1}}}$	Contrast	$\mathbf{\text{Pr}}>\mathbf{F}$	Change (%)
Heterozygosity (H)	0.356	0.192	0.164	<0.0001	$-$ 46.1
Yield (g/plant)	727.6	369.6	358.0	<0.0001	$-$ 49.2
Count (fruit)	24.5	16.4	8.2	<0.0001	$-$ 33.1
Weight (g/fruit)	29.7	22.8	6.9	<0.0001	$-$ 23.2
Firmness (kg-Force)	0.81	0.86	$-$ 0.05	0.32	6.2
TSS (%)	8.9	10.2	$-$ 1.3	<0.0001	14.6
TA (%)	0.75	0.81	$-$ 0.06	0.01	8.0
TSS/TA	11.9	12.7	$-$ 0.8	0.08	6.7
ANC (μg/mL)	104.2	111.5	$-$ 7.3	0.29	7.0

Contrasts (${\overline{y}}_{S_0}-{\overline{y}}_{S_1}$) were estimated between the phenotypic means of nine elite parents (S₀ individuals) and 31 of their self-pollinated (S₁) offspring for fruit yield, count, weight, firmness, TSS, TA, and ANC, where ${\overline{y}}_{S_0}$ is the EMM of the nine parents and ${\overline{y}}_{S_1}$ is the EMM of the 31 S₁ offspring. EMMs were estimated from phenotypes observed across clonal replicates, harvests, and years in Salinas, California field experiments in 2017–2018 and 2018–2019. The percent change was estimated by $({\overline{y}}_{S_0}-{\overline{y}}_{S_1})/{\overline{y}}_{S_0}\times 100$.