Abstract

GARZA-GARCIA, Dagoberto; GARZA-GARCIA, Ramón; ZUNIGA-ESTRADA, Lamberto  and  MARTINEZ-MARTINEZ, Mario Alberto. Preliminary test of tropical pumpkin lines with higher productivity. Rev. Mex. Cienc. Agríc [online]. 2020, vol.11, n.3, pp.677-683.  Epub Aug 30, 2021. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v11i3.2394.

The vast majority of pumpkins consumed in the world have their origin in species that were domesticated in Mexico, all of them belong to the genus Cucurbita. Seed collections were obtained from the Huasteca, the localities are: Cd. Mante, Antiguo Morelos, Cd. Valles, Río Verde and Huejutla. In relation to the antecedents, for this investigation it was decided to scrutinize by hybridization in simple cross and selfing with individual selection of fruits. Being warm weather gourds we started and made the crosses in a greenhouse with controlled temperatures of 25 to 35 degrees, at CEVAMEX, in 2015 a direct cross of all against all in which we had flowers to pollinate began and it was observed that the stamens filaments formed a foot and nectariferous discs, also with different numbers 3, 4, 5 and up to 6. Genetic improvement with self-fertilization and individual selection of fruits, for which we try to match the stigmas and the same stamens, we are currently in F3 which is an inbreeding of 87.5%. It is observed in Figure 4 the progress of the increase of pumpkin seed cheeks is illustrated and eliminating the spaces within the pumpkin fruit cavities, as well as in Table 1, the weights of the fruits and their seed yields dry and the percentage of seed gain within the fruit, that of 4 cheeks from 5 to 53% and those of 5 cheeks is from 37 to 53%.

Keywords : Huasteca; pipian; stigma cheeks.