The mutant maragogipe in spite of having large beans and strong vegetative growth is a low yielding type of coffee. In the Northeastern coffee region of S. Paulo, a higher yielding strain of the Maragogipe coffee (Maragogipe A.D.) is cultivated, which aiso has large and well developed beans. Selection in this coffee was started in 1935 when 115 coffee mother trees were selected. Seeds from open pollinated flowers were planted in nurseries, the seedlings being transplanted to large distances in order to be classified according to segregation for the maragogipe and bronze alleles. Twenty seedlings from apparently Mg Mg progenies were transplanted to the field in 1936 in line and without replication, forming a group A of progenies. From visually segregating progenies (Mg mg), only 10 plants were transplanted in 1936 in line and also without replication (group B). A year later 10 more seedlings were transplanted of the same group B progenies, derived from selfed (group C). All 2,300 plants of the 115 progenies were individually harvested during the first six consecutive years, when a preliminary selection of the 20 higher yielding progenies was undertaken, and also 310 individual coffee plants belonging to several other progenies. Yielding data were obtained for these groups of progenies and individual plants for another period of eight or nine years. The yielding data were analysed in order to verify how effective a very precocious selection would be based only on the yield data corresponding to the first two crops, in relation to the obtained data of six consecutive horvests. It wos verified that if such selection was made for the 62 progenies of the group A, from the 35 progenies with yield equal or above the average yield of the whole group, corresponding to the first biennial, only 4 (6.5%) good progenies would be lost after six consecutive crops (Table 2). From the 53 progenies of the group B only 4 (7.6%) would not be selected (Table 5) and this percentage for the group C would be of 8.5% (Table 7). It may be concluded that the high yielding Maragogipe progenies reveal this characteristics very early. However a period of at least six consecutive crops is advisable to be recorded before any selection be made in order to avoid losing good but late yielding progenies. The correlation coefficient of 0.65 for the yields of the plants of the same progenies belonging to the group B (open pollinated) and C (self pollinated) indicated that the self pollination has not affected the yield. Only the yield variability measured by the coefficient of variation (Tables 1, 4) seems to be higher for the group C. For the 20 progenies and 310 individual plants whose yields were followed for 14 consecutive years, a comparison was also undertaken of the yield after 2, 4, 6 and the 14 years in order to evaluate the effectiveness of a precocious selection. It was concluded that in order to select high yielding individual coffee trees of the Maragogipe A.D., it is better to control the yields for a period of at least 14 years. From the 115 selected mother trees, it was found that 81 carry the maragogipe allele in the homozygous condition (Mg Mg) while 34 are heterozygous (Tables 3, 6 and 8). A comparison of the total yield of their respective progenies after six consecutive harvests, indicated that yields are higher in the progenies of the heterozygous plants in the three groups A, B and C of progenies. Progenies of the mother trees of the constitution Br Br (bronze), Br br (light bronze) and br br (green) do not differ in their total six-year yields. The segregation for this genetic factor does not seem to affect the yield variability. The 17 highest yielding plants after six consecutive crops were analysed in relation to the typica, bronze and maragogipe alleles. The alleles typica and maragogipe seemed to affect the yield, the plants bringing the alleles tt or Mg mg producing more ripe coffee than the plants of constitution TT or Mg Mg. A comparison was made of the percentage of the flat, peaberry and shell types of seeds, found in the 115 mother trees and their respective progenies (Table 12) and also for the seed size and outturn. No significant differences were found in these characteristics. However the percentage of peaberry seeds revealed to be higher for the selfed part (group C) of some progenies of group B. The outturn data indicated that a selection could be successfully dane improving the yield of seeds, in some of the high yielding progenies. In spite of the yielding differences noticed among the Maragogipe A.D. progenies, even the most promising ones can not compete with other coffee selection developed at Campinas. If for any special purpose the Maragogipe A.D. will be recommended for planting, the progenies numbered 315, 300, 306 and 307 would be indicated for establishment of multiplication plots.