The use of selection index in rubber trees
An index selection of young rubber trees (Hevea spp) was established, utilizing several characteristics such as plant height (x), stem diameter (y) flushes of leaves (z) and dry rubber yield (w). The population was concerned about halt-sib clones of IAN 713, IAN 171, IAN 873, Fx 3899, and a hybrid clone of Hevea pauciflora vs. Hevea brasiliensis. The experiment was carried out in a completely random desing, with four replications, and ten plants within a plot. The data were collected when the plants were twelve month old. The index selection value (I = -0.001 171x + 0.000367y + 0.000503z + 1.048130w) indicated the advantage of selection in the shortes plants as a factor of reducing the tapping age. Ten plants in the intensity of 5% selection were selected with a 0.001780 value of genetic gain (Gs). This value represented 24.9% of the index average of the original population. It was observed a high phenotypic correlation value between plant height stem, diameter and yield, and a low interrelationship of these characters with number of flushes of leaves. The results showed the advantage of utilizing rootstocks from the clones IAN 713 and IAN 717, beside the necessity of improvement of MTP (mini test of production).
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | por |
| Published: |
Pesquisa Agropecuaria Brasileira
2014
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| Online Access: | https://seer.sct.embrapa.br/index.php/pab/article/view/16732 |
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