Induction of mutations in citrus hybrids by in vivo method for the obtainment of seedless fruits

• Grant number: 16/23155-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: February 01, 2017
• End date: December 31, 2018
• Field of knowledge: Agronomical Sciences - Agronomy - Crop Science
• Principal Investigator: Mariângela Cristofani-Yaly
• Grantee: Gabriela da Costa
• Host Institution: Instituto Agronômico (IAC). Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). Campinas , SP, Brazil
• Associated research grant: 11/18605-0 - Obtaining and evaluation of new varieties of scion and rootstock for citrus, AP.TEM

Abstract

An important requirement of the citrus fruit market is the cultivation and marketing of fruit containing a low number or absence of seed. Thus, the objective of this work will be to evaluate plant populations from axillary buds irradiated aiming to select mutants containing fruits with few or without seeds and with other mutated characteristics. The GR 30 doses (dose that can cause 30% of reduction in development compared to control) determined in a previous work for TM x TP 9, 11 and TM x LP 16 and 281 hybrids were 15 , 57; 19.09; 21.9 and 16.3 Gy, respectively. For each variety, an orchard with 500 plants, grafted on Rangpur lime and another 10 control plants (from non-irradiated buds) was formed. Each orchard was formed in the spacing of 6 x 0.5 m. During the vegetative development of the orchards and until the beginning of the fruiting period evaluations of the vegetative development of each plant, aiming at the selection of possible compact-sized mutants will be carried out. When the fruiting period begins, each plant will be evaluated for physical-chemical quality of the fruits and for mutations that produce fruits containing reduced numbers or with absence of seeds. (AU)