Efficiency of Mendes' early tapping test in relation to Hamaker Morris-Mann in rubber tree selection

Abstract

The performance of Mendes' early Tapping Minitest (MTP) in relation to the modified Hamaker Morris-Mann test (HMM) is studied aiming to evaluate the efficiency of former in early selection of clones (budded stumps) and seedlings of rubber tree (Hevea spp.). The results achieved showed highly significant correlation among the three rounds conducted, as well as between the results of the two methods in selecting high yielding seedling, both in open or controlled pollination nurseries. On the other hand, there was no significant correlation between them when applied to clones, what indicates the low efficiency of these tests in early selection of rubber tree clones. Modifications on the Microtapping Test are suggested for further studies envolving either clones or seedlings in order to improve its selection efficiency.