Phenotypic parameters of macromineral and phenolic compound concentrations and selection of Andean bean lines with nutritional and functional properties

Abstract

The development of Andean common bean lines that contain high macromineral concentration and a phenolic compound concentration that meets the consumer’s dietary requirements is unprecedented in the literature. The objectives of this study were to obtain estimates of phenotypic parameters for the macromineral and phenolic compound concentrations in a recombinant inbred line (RIL) population of Andean beans and to select lines with nutritional and functional properties. The RIL was obtained from a cross between cultivars Hooter and Cal 96. The lines in the F5:6 and F5:7 generations and the cultivars were evaluated in two consecutive experiments in the same experimental area. The concentrations of potassium (K), phosphorus (P), magnesium (Mg), and calcium (Ca) were determined by acid digestion, whereas the phenolic compound concentration was obtained by the Follin-Ciocalteu method. A significant genotype effect was observed for all traits evaluated in the F5:6 and F5:7 generations. Intermediate-to-high heritability estimates (h2: 43.15 to 98.85%) were obtained for the concentrations of K, P, Mg, Ca and phenolic compounds. These traits exhibited transgressive segregation and quantitative inheritance in the RIL population of Andean beans. Lines DFA 34-18 and DFA 46-18 have high K and P concentrations and low phenolic compound concentration and will be selected by the human nutrition. Lines DFA 04-18 and DFA 05-18 and cultivars Pérola, IPR Siriri, IAC Imperador, and IPR Tangará showed high concentrations of two or more macrominerals and phenolic compounds; therefore, they have nutritional and functional properties and will be selected by the breeding program.

Selection strategies for identifying fast cooking, mineral-biofortified bean cultivars with high agronomic performance

“…The rank-sum index provided genetic gain estimates with a sign unfavorable to the objectives of the selection for lodging (economic weight equivalent to the coefficient of genetic variation); lodging and the concentrations of potassium, phosphorus and zinc (economic weight proportional to the standard deviation and equal to a 10 % gain in relation to the mean of each trait); and phosphorus concentration (weight two for grain yield and weight one for the other traits; weight six for grain yield and weight one for the other traits; and weight six for grain yield, weight three for cooking time and weight one for the other traits). Therefore, for none of the economic weights associated with the ranksum index was it possible to obtain favorable genetic gains in the selection of all evaluated traits, confirming previous results described for the selection of superior common bean cultivars (Ribeiro et al, 2019a, b;Ribeiro and Mezzomo, 2020). The rank-sum index was also used for ranking the common bean genotypes regarding the traits analyzed (Dias et al, 2020;Silva et al, 2018;Zanottti et al, 2020).…”

Environmental variability in simultaneous selection of common bean for grain quality and mineral concentration traits

“…The four carioca bean genotypes selected also have high calcium (≥ 1.4 g kg -1 dry matter -DM) and magnesium (≥ 2.0 g kg -1 DM) concentrations, according to the classification proposed by Ribeiro et al (2013) and by Ribeiro and Mezzomo (2020), respectively. The use of common bean cultivars biofortified with calcium and magnesium in the diet may have health benefits.…”

Phenolic Compounds, Antioxidant Activity and Mineral Contents in Grains of Phaseolus lunatus L. and P. coccineus L. Landraces

“…Phenolic Compounds, Antioxidant Activity and Mineral Contents in Grains of Phaseolus lunatus L. and P. coccineus L. Landraces of genes for a plant breeding program or for direct consumption, according to the methods suggested by Ribeiro and Mezzomo (2020). Zn and Fe are essential mineral elements for human health and were exceptionally high in the PL-005 and PL-014 populations of P. lunatus, the PC-022 population of P. coccineus and the PV-003 population of the control species P. vulgaris, with 3.88 to 4.49 and 5.62 to 7.38 mg 100 g -1 Zn and Fe, respectively (Table 5).…”