Banca de DEFESA: DIOGO DE VILELA MARINHO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : DIOGO DE VILELA MARINHO
DATA : 13/12/2018
HORA: 13:30
LOCAL: Departamento de Fitotecnia
TÍTULO:

Determination of genetic parameters for agronomic and productive characters at ENAS 1125 x Perinha Água Branca cherry tomato.

PALAVRAS-CHAVES:

Key words: Cherry Tomato, Solanum lycopersicum, Breeding, Genetic Variation, Heritability

PÁGINAS: 80
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Melhoramento Vegetal
RESUMO:

MARINHO, Diogo de Vilela. Determination of genetic parameters for agronomic and productive characters at ENAS 1125 x Perinha Água Branca cherry tomato. 2018. 81p. Dissertation (Master in Plant Science). Institute of Agronomy, Department of Fitotecnia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, 2018. 

Breeding programs are of great importance for modern agriculture and for the sustainable increase of agricultural production. However, in the case of cherry tomatoes (Solanum lycopersicum var. Cerasiforme), there is still a lack of data and studies in the literature that are sufficient to satisfactorily subsidize breeding or genetic studies on this crop. The present study had as objectives: to study the heritability of agronomic characteristics in populations P1, P2, F1, F2, F3 and F4 of Solanum lycopersicum var. cerasiforme obtained with the crossing of cultivars ENAS 1125 X PERINHA ÁGUA BRANCA of Cherry Tomato; to estimate genetic parameters for agronomic and productive characteristics to guide the best choice in breeding methods to obtain pure lines with market potential. The experiments were conducted under field conditions between November 2016 and September 2018, at the Vegetation House in the Large Crops Sector of the Agronomy Institute and at the Experimental Field of the Institute of Agronomy - Department of Plant Science - UFRRJ. The design, in both experiments, was in randomized blocks (DBC), following the recommendation of the literature to conduct the culture. The characteristics evaluated in the first experiment were: average weight of the fruits (grams), average weight of the bunches (grams), total production per plant (kg), number of fruits (units) and soluble solids content (ºBrix). It was found complete dominance only in the characteristic soluble solids content, absence of dominance for number of fruits and overdominance for average fruit weight, total production per plant and average weight of the bunches. The heritability estimates in the broad sense presented 58% for average fruit weight, 66% for total production per plant, 33% for average weight of bunches, 67% for fruit number and 75% for soluble solids content. The heritabilities in the restricted sense were estimated in 23% for average fruit weight, 3% for total production per plant, 2% for average weight of bunches, 0% for fruit number and 53% for soluble solids content. In the second experiment, the average weight of fruits (grams), total production per plant (kg) and number of fruits (units) were evaluated. Estimates of heritability in the approximate restricted sense presented values of 14% for total number of fruits, 30% for total production and 40% for average fruit weight. Thus, the characteristics of average fruit weight, total yield per plant and average weight of the bunches showed that they are inheritable characteristics and indicated for the breeding of the cultivars ENAS 1125 X PERINHA ÁGUA BRANCA of cherry tomatoes. 

MEMBROS DA BANCA:
Presidente - 387288 - MAURICIO BALLESTEIRO PEREIRA
Externo ao Programa - 2271445 - BRUNA RAFAELA DA SILVA MENEZES
Externo à Instituição - MARIA DO CARMO DE ARAÚJO FERNANDES - OUTRO