Genetic control of potassium content of common bean seeds

Abstract

-The objective of this work was to investigate possible maternal effects on potassium content of common bean seeds, as well as to estimate the heritability and selection gains in early hybrid generations for this character and to evaluate the efficiency of genetic selection to improve the nutritional quality of common bean (Phaseolus vulgaris). Crosses with four cultivars from the Mesoamerican gene pool yielded the reciprocal F 1 and F 2 generations and the backcrossed populations (BCP 1 and BCP 2 ). The potassium content of the progenies was measured via nitric-perchloric digestion and flame photometry. The potassium content in the tested progenies varied from 6.0 to 14.9 g kg -1 dry matter, and no significant maternal effect was observed. The narrow-sense heritability ranged from low (33.26%) to intermediate (43.05%). Partial dominance was observed for low potassium content in the seeds. No increase in potassium content was obtained through selection. Breeding common bean plants for increasing potassium content in seeds may be difficult because the local environment strongly influences the character.Index terms: Phaseolus vulgaris, heritability, maternal effect, nutritional quality, selection gain. Controle genético do teor de potássio em sementes de feijãoResumo -O objetivo deste trabalho foi investigar um possível efeito materno no teor de potássio em sementes de feijão-comum (Phaseolus vulgaris), além de estimar a herdabilidade e o ganho na seleção em gerações precoces quanto a esse caráter e avaliar a eficiência da seleção em aumentar a qualidade nutricional do feijão. Cruzamentos entre quatro cultivares do grupo gênico Mesoamericano produziram as gerações F 1 e F 2 recíprocas e os retrocruzamentos (RCP 1 e RCP 2 ). O teor de potássio das progênies foi medido por digestão nítrico-perclórica e uso de fotometria de chama. O teor de potássio nas progênies testadas variou de 6,0 a 14,9 g kg -1 de matéria seca, e nenhum efeito materno significativo foi observado. A herdabilidade em sentido restrito variou de baixa (33,26%) à intermediária (43,05%). Foi observada dominância parcial quanto ao baixo teor de potássio nas sementes. Nenhum aumento no teor de potássio foi obtido por meio de seleção. O melhoramento para aumentar o teor de potássio em sementes de feijão-comum pode apresentar dificuldades, porque o efeito de ambiente influencia fortemente o caráter.Termos para a indexação: Phaseolus vulgaris, herdabilidade, efeito materno, qualidade nutricional, ganho na seleção.

Genetic parameters of agronomic and nutritional traits of common bean (Phaseolus vulgaris L.) populations with biofortified grains

“…The mean of the five lines superior for potassium in the P 1 , P 2 , P 3 and P 4 was higher than the values recorded by Poersch et al (2011) for this mineral in the F 2 generation. Therefore, from the tested crossings, it is possible to select common bean inbred lines with high potassium concentration in grains.…”

“…Four common bean populations with biofortified grains for potassium (population 1 -P 1 ), phosphorus (population 2 -P 2 ), zinc (population 3 -P 3 ) and copper (population 4 -P 4 ) were obtained by Poersch et al (2011), Rosa et al (2010, and Poersch et al (2013), respectively. For this, controlled crossings were carried out between the cultivars IAPAR 44 × Guapo Brilhante, and BRS Expedito × BRS Valente (P 1 ), Pérola × Guapo Brilhante, and TPS Nobre × Guapo Brilhante (P 2 and P 3 ), and IAPAR 44 × IAPAR 31, and Diamante Negro × TPS Bonito (P 4 ) ( Table 1).…”

Antioxidant Capacity and Phytonutrient Content in the Seed Coat and Cotyledon of Common Beans (Phaseolus vulgaris L.) from Various Regions in Mexico

“…Moreover, bean consumption in Latin America provides 8–27% of potassium needed to satisfy daily nutrition requirements. This legume contains up to three times more potassium than bananas [8]. It also has a high phosphorus content in which a high genetic variation has been observed.…”

Quantification and Inheritance of Antioxidant Properties and Mineral Content in Ridge Gourd (Luffa acutangula)

“…Single dominant gene controls the high seed Zn concentration in French/navy bean [8]. Low level of narrow-sense heritability and partial dominance reported for K content in common bean seed [22]. Prevalence of non-additive variance and non-additive gene action for Fe, Zn, Mn, K and Ca accumulation in cabbage was reported by Singh et al [32].…”