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This present work aimed to evaluate the self-incompatibility and self-compatibility behaviour of the Brazilian Feijoa Active Germplasm Bank accessions. The presence or absence of the self-incompatibility of the accessions was accessed through hand self-pollination. Out of 210 accessions evaluated from 2001 to 2018, 53.3% were registered as self-incompatible, while 46.7% were self-compatible with different degrees of self-compatibility based on the number of formed fruits. Subsequently, the fruit set as a result of inter-crosses between five self-incompatible accessions were evaluated. Fifty per cent of the reciprocal crosses exhibited similar productive efficiency based on fruit set. Self-incompatible accessions, although compatible with each other, revealed differences in restoration, based on the number of fruit and seeds between reciprocal crosses. Using Spearman’s correlation ( r s), significant association between the number of seeds and fruit set in fruits from hand self-pollination were detected in two harvests ( r s  = 0.64,  r s  = 0.72, respectively). There was also a positive correlation between the number of seeds and yield of pulp (%) in hand self-pollination ( r s  = 0.30;  r s  = 0.39,  P  &lt; 0.01), hand cross-pollination ( r s  = 0.35,  r s  = 0.64) and open pollination ( r s  = 0.58,  r s  = 0.72), respectively. These associations suggest that the number of seeds could be directly related to the pulp yield and the self-compatibility of feijoa.

Advances on self-(in)compatibility of accessions of feijoa [ Acca sellowiana (O. Berg.) Burret]