Inheritance of Seed Zinc Accumulation in Navy Bean

Abstract

a correlation between high phytate diets and limited Zn absorbance in the gastrointestinal tract of humans and Human zinc (Zn) deficiency is a widespread condition prevalent in animals (Saha et al., 1994; House et al., 1982; Turnlund people consuming grain and legume based diets. Dry beans (Phaseolus vulgaris L.) are frequently the major protein source in such diets. et al., 1984;Lonnerdal et al., 1989; Hunt et al., 1998; One way to reduce the incidence of Zn deficiency may be through Zhou et al., 1992). The recommended daily allowance the development of high Zn dry beans. Large variation for dry bean of Zn established for people of the USA is 12 to 15 mg seed Zn concentration exists, which would aid in the development of for adults and 10 mg for children. However, this amount Zn-rich cultivars. The objectives of this study were to determine the of Zn may be too low for people whose diets are vegetarinheritance of seed Zn levels in navy bean and to measure seed ian and phytate rich. Dietary phytate: Zn molar ratios phytic acid (PA) levels in relationship to seed Zn concentration as are a major factor in determining the risk of Zn defian indicator of Zn bioavailability. A high seed Zn cultivar 'Voyager'ciency (Frossard et al., 2000). and a low seed Zn cultivar 'Albion' were used to create the F 2 and One way to alleviate Zn deficiency in humans mainbackcross populations that were field grown in 1999 and 2000. Seed taining legume-rich diets, as seen in countries of Latin Zn was measured in both years and seed phytic acid was measured in 1999. The results of this experiment suggest that a single dominant America, Africa, and to a lesser extent, vegetarians in gene controls the high seed Zn concentration in the Voyager/Albion the USA is to introduce cultivars with increased levels cross. In addition, phytic acid levels between the parent cultivars Navy bean cultivars Albion (Asgrow Seed Company, Kalamazoo, MI, 1987) with low seed Zn and Voyager (Rogers

<b>Genetic parameters of iron and zinc concentrations in Andean common bean seeds

“…The broad-sense heritability of the zinc concentrations of Andean common bean seeds had a high magnitude (h 2 b= 63.36 to 72.22%), and the narrow-sense heritability had an intermediate (h 2 n= 31.04%; IAC Boreal × Light Red Kidney) to high (h 2 n= 63.60%; Ouro Branco × Light Red Kidney) magnitude. The variation range that was obtained for the broad-sense and narrow-sense heritability estimates of zinc concentrations was similar to that found for Middle American common bean seeds by Rosa et al (2010) and was inferior to the estimates reported by Cichy et al (2005). In this study, a high narrow-sense heritability was observed for the zinc concentration in the cross Ouro Branco × Light Red Kidney, indicating the predominance of additive variance.…”

“…A continuous distribution of the iron and zinc concentrations in common bean seeds was previously described in early (Possobom et al, 2015) and advanced (Blair, Astudilo, Grusak, Graham, & Beebe, 2009;Cichy, Caldas, Snapp, & Blair, 2009;Blair et al, 2010b;Ribeiro et al, 2014b;Teixeira, Lima, Abreu, & Ramalho, 2015) generations in recombinants that were obtained from the crosses Andean × Andean, Andean × Middle American and Middle American × Middle American. These results affirm that the iron and zinc concentrations in common bean present quantitative inheritance in populations of low and high homozygosity, regardless of the gene pool, and that they oppose the initial hypothesis of Cichy et al (2005) regarding the monogenic control of the zinc concentration in common bean seeds.…”

“…We obtained three recombinants with a zinc concentrations in seeds greater than 31 mg kg -1 DM, which is considered high according to the stratification presented by Cichy et al (2005) and Tryphone and Nchimbi-Msolla (2010), in the cross IAC Boreal × Light Red Kidney. The selection and advance of these populations will result in the development of common bean cultivars that are biofortified for zinc, which can contribute to immune system improvement, dermatitis treatment, bone maturation and taste sensitivity, which are all affected by zinc deficiency in the body (Gibson, 2012).…”

“…The expression of a maternal effect of iron and zinc concentrations in common bean seeds depends on the evaluated gene pool and the tested hybrid combination (Jost, Ribeiro, Cerutti, Poersch, & Maziero, 2009;Rosa et al, 2010;Silva, Abreu, & Ramalho, 2013;Mukamuhirwa, Tusiime, & Mukankusi, 2015;Possobom, Ribeiro, Domingues, & Casagrande, 2015). Similarly, there is a wide range of variation for narrow-sense heritability and predicted gain with selection estimates for iron and zinc concentrations in Middle American and Andean common bean seeds (Cichy, Forster, Grafton, & Hosfield, 2005;Jost et al, 2009;Rosa et al, 2010;Mukamuhirwa et al, 2015;Possobom et al, 2015).…”

Genetics of phosphorus content in common bean seeds

“…It was postulated that the zinc content in the navy bean seeds was controlled by a single dominant allele and additive gene action was responsible for most of the observed (Cichy et al 2005). In this case, a dominant monogenic inheritance and high heritability for zinc content was verified.…”