Repeatability analysis in an ex situ collection of camu-camu [Myrciaria dubia Kunh (McVaugh)] from the Peruvian Amazon

The aim of this study was to select camu-camu genotypes in an ex situ collection established in a floodable area of the Peruvian Amazon basin in 2002. The collection had 115 samples from the Itaya, Napo, Tigre, Curaray and Putumayo basins. Data from ten consecutive harvests (2006 to 2015) were analyzed using Selegen-Reml / Blup. The analysis allowed to know the levels of repeatability under selective precision, whose average was 1242 g.pl(-1) with an initial repeatability index of r = 0,045, which increased after 10 years to rm = 0,322, selective precision of 0,567 and selective efficiency of 2,66. Based on these indices, ten best plants for fruit production were selected. The selected plants came from Napo (NY0413, NY0518, NY0805, NN0202, NN0907), Putumayo (PC0415, PC0421, Pc0504, Pc0511) and Curaray (Ct0316) basins. The average fruit weight was 8,35 g, r = 0,218, rm = 0,736, selective precision 0,85 and selective efficiency 1,83. The ten selected individuals came from the Tigre (TH0215, TH0105, TT0725, TH0622), Putumayo (PC0511, PC0913, PC0602, Pc1014, PC0129) and Curaray (Ct0107) basins. A natural recombinant (yield x fruit weight) is Pc0117 (Putumayo-Coto population). The selection of superior genotypes with a high degree of reliability was achieved using the repeatability method applied in this study.