Genetic parameters and selection indexes for biofortified red leaf lettuce

Authors

  • Joicy Vitória Miranda Peixoto Universidade Federal de Uberlândia, Campus Monte Carmelo, Rodovia LMG 746, Km 1, Araras, s/no, CEP 38500-000 Monte Carmelo, MG.
  • Gabriel Mascarenhas Maciel Universidade Federal de Uberlândia, Campus Monte Carmelo, Rodovia LMG 746, Km 1, Araras, s/no, CEP 38500-000 Monte Carmelo, MG.
  • Rafael Resende Finzi Universidade Federal de Uberlândia, Campus Monte Carmelo, Rodovia LMG 746, Km 1, Araras, s/no, CEP 38500-000 Monte Carmelo, MG.
  • Lucas Medeiros Pereira Universidade Federal de Uberlândia, Campus Monte Carmelo, Rodovia LMG 746, Km 1, Araras, s/no, CEP 38500-000 Monte Carmelo, MG.
  • Ana Carolina Silva Siquieroli Universidade Federal de Uberlândia, Campus Monte Carmelo, Rodovia LMG 746, Km 1, Araras, s/no, CEP 38500-000 Monte Carmelo, MG.
  • Marina Freitas e Silva Universidade Federal de Uberlândia, Campus Glória, BR-050, Km 78, CEP 38410-337 Uberlândia, MG.
  • Andressa Alves Clemente Universidade Federal de Uberlândia, Campus Monte Carmelo, Rodovia LMG 746, Km 1, Araras, s/no, CEP 38500-000 Monte Carmelo, MG.

DOI:

https://doi.org/10.1590/S1678-3921.pab2021.v56.26972

Keywords:

Lactuca sativa, anthocyanin, biofortified food, genetic variability, nonparametric indices

Abstract

The objective of this work was to determine the genetic parameters and the efficiency of different selection indices for biofortified red leaf lettuce (Lactuca sativa var. crispa) lines with agronomic and nutritional potential. The experiment was carried out in a randomized complete block design with three replicates and 31 crisp-textured and red-tinted leaf lettuce genotypes: the Belíssima cultivar, with a low carotenoid content and rich in anthocyanins; and 30 lines from the cross between the Belíssima and Uberlândia 10000 cultivars, rich in carotenoids and with a low anthocyanin content. The assessed traits were: total green mass (g), stem diameter (cm), leaf count, plant diameter (cm), foliar temperature (°C), soil plant analysis development (SPAD) index, anthocyanin content (mg 100 g-1 sample), and bolting (days after sowing). To estimate selection gains, 12 genotypes were selected through selection indices. The traditional index proposed by Smith & Hazel and the sum of ranks index by Mulamba & Mock provided the highest selection gains in the biofortified lettuce. The coefficient of genotypic determination for leaf count, anthocyanin content, bolting, and SPAD index is of high magnitude.

Downloads

Published

2021-10-20

How to Cite

Peixoto, J. V. M., Maciel, G. M., Finzi, R. R., Pereira, L. M., Siquieroli, A. C. S., Silva, M. F. e, & Clemente, A. A. (2021). Genetic parameters and selection indexes for biofortified red leaf lettuce. Pesquisa Agropecuaria Brasileira, 56(Y), e02431. https://doi.org/10.1590/S1678-3921.pab2021.v56.26972

Issue

V.56, Jan./Dec., 2021 :Continuos publication

Section

GENETICS