Coffee breeding: XXX - productivity of coffee progenies in the pindorama region

The yielding capacity of three progenies of the cultivar 'Mundo Novo', four of 'Burbon Amarelo' and F2 generation of the hybrids between 'Bourbon Vermelho' and 'Maragogipe' and 'Bourbon Vermelho' and 'Tipica' were compared in a progeny trial at the Experimental Station in Pindorama. It was found that 'Mundo Novo' progenies had the highest yield of coffee cherries after ten consecutive harvests. These progenies also had larger and higher amounts of flat beans. The group of progenies of 'Bourbon Amarelo' was ranked in second. Only one progeny of 'Bourbon Amarelo' was not significantiy different from the best 'Mundo Novo' progeny P 516. The variance was found to increase almost linearly, from the third to the tenth consecutive harvests while the coefficient of variation remained constant after the six consecutive crops. The increase in the variance values reduced the efficiency of the statistical analysis for separation of the best progenies. Whereas after three or four consecutive harvests many of the progenies were statistically separated from one another after the tenth consecutive harvests most of the progenies belonged to the same group of the Duncan test. This information bears on the value of precocious selection of the best coffee progenies, already described for the cultivars 'Bourbon Vermelho' and 'Mundo Novo'.