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Reproductive biology and hibridation of Physalis L. species

Grant number: 19/15378-5
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): September 01, 2019
Effective date (End): August 31, 2020
Field of knowledge:Agronomical Sciences - Agronomy
Principal Investigator:André Ricardo Zeist
Grantee:André Dutra Silva Junior
Home Institution: Faculdade de Ciências Agrárias. Universidade do Oeste Paulista (UNOESTE). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil

Abstract

Physalis is an important fruit, which despite being a prominent presence in other countries, in Brazil is still consumed as exotic. Its breeding has advanced little over time, leading to a cultivation of the fruit based on the species of higher local consumption and making plants with the same edaphoclimatic requirement are cultivated in different regions. In this way, also preventing the agronomic advantages as well as diversified nutritional benefits of the species of the genus can be explored efficiently. In view of the above, the objective is to study the possibility of interspecific crosses, aiming the generation of hybrids of physalis that may present characteristics of economic and / or nutritional interest and to know aspects of the reproductive biology of species of the genus, necessary for the accomplishment of these crosses. The work will be carried out at the University of Western São Paulo (Unoeste) between August 2019 and July 2020 and will begin with the planting of eight species of fisalis (P. peruviana, P. ixocarpa, P. angulata, P. P. pubescens, P. pruinosa, P. alkekengi and P. daturaefolia) that will later be transplanted into pots and kept in a greenhouse. At the start of flowering, the plants will have pollen viability evaluated and the moment the stigma is receptive will also be determined. Knowledge of these fundamental characteristics for the accomplishment of crosses will be followed by hybridization, carrying out controlled pollination among all the species under study, in addition to self-fertilization. Cross-breeding will be done in such a way that all species are both donor and recipient of pollen. The percentage of glue and abortion of the crosses will be evaluated. From the fruits developed from these crosses will be counted the average number of seeds, together with the viability of the same. It is hoped that this work will better understand the reproductive biology of species of fisalis, in addition to obtaining seeds resulting from the cross between species, so that in the future these materials can be evaluated and selected in the field, starting a program of breeding of fisális Brazilian.