Comparisons of maize populations for aluminum tolerance in nutrient solution

Magnavaca, R.; Gardner, C. O.; Clark, R. B.

doi:10.1007/978-94-009-3581-5_17

Cited by 17 publications

(8 citation statements)

References 14 publications

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“…Our study confirmed that GCA has a strong effect on the inheritance of adaptation to acidic, Al‐toxic soils in maize. This was also observed by Duque‐Vargas et al (1994) for the tolerant SA3 germplasm and by Magnavaca et al (1987) and Lima et al (1992) for Al resistance in terms of root elongation in nutrient solutions containing toxic concentrations of Al. Eticha et al (2005) evaluated Al‐induced callose formation in root apices in the same diallel set and concluded that Al resistance is mediated largely by additive genes.…”

Section: Discussionsupporting

confidence: 69%

Heterosis and Combining Ability for Maize Adaptation to Tropical Acid Soils: Implications for Future Breeding Strategies

et al. 2005

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been removed from the soil by leaching or via harvested crops (Granados et al., 1993). Acidic soils, therefore, Soil acidity reduces maize (Zea mays L.) yields by up to 70% on generally have a low pH, contain toxic levels of Al and 8 million hectares in developing countries. Several breeding programs have produced populations better adapted to these conditions. TheMn, and are deficient in Ca, Mg, P, K, and Mo. These objectives of this study were to evaluate these populations for both characteristics limit the fertility of acid soils and inhibit per se cultivation and the development of new breeding germplasm. root development, leading to low water and nutrient up-To do so, we generated a diallel cross design, which included six acid take and low maize yields (Duque-Vargas et al., 1994). soil-tolerant and five susceptible populations with high yield potential Soil amendments (the application of lime and fertilizor tolerance to other stresses. Populations and crosses were evaluated ers) have been used to bring acid soils under agricultural in five environments, on acidic Al-toxic soils and in comparable limed production. However, such solutions may not be envisoils in Guadeloupe, Cameroon, and Colombia. Soil acidity decreased ronmentally friendly, have only a temporary effect, and grain yield by 46 to 73%, depending on the location and year. Signifiare too expensive for poor farmers in developing councant genotype ϫ soil condition interactions were observed for grain tries (The et al., 2001). The use of acid soil-tolerant maize yield. Mid-parent heterosis for yield was significantly higher in acid soils (32%) than in nonacid soils (20%). This suggests that the develop-cultivars provides an environmentally friendly, inexpenment of variety crosses between acid soil-tolerant populations could sive, and permanent solution, contributing to sustainbe used to increase maize yields in acid-soil cropping systems. The able crop production on acid soils (Granados et al., observed high general combining ability (GCA) for yield variation of 1993). the crosses in acid soil and its close relationship to per se performance Considerable genetic variation in acid-soil tolerance suggest that parental populations of variety crosses could be efficiently has been reported in maize. Early studies demonstrated screened on the basis of per se performance in acid soil.

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Section: Discussionsupporting

confidence: 69%

Heterosis and Combining Ability for Maize Adaptation to Tropical Acid Soils: Implications for Future Breeding Strategies

et al. 2005

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“…The RTI was used to group the accessions into tolerant or sensitive categories. After the pre-screening, a representative sample of 99 accessions (Table 1) that had been rated as tolerant, sensitive or intermediate were selected and subjected to Al stress in aerated nutrient solution (Magnavaca et al, 1987). Sterilized sorghum seeds were pre-germinated in the dark for 72 h at 25°C between sheets of sterilized paper towels that were moistened with sterile distilled water.…”

Section: Methodsmentioning

confidence: 99%

Response of selected sorghum (Sorghum bicolor L. Moench) germplasm to aluminium stress

Emily¹,

Beatrice²,

Augustino³

et al. 2014

Afr. J. Agric. Res.

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Sorghum (Sorghum bicolor L. (Moench) is an important food security crop in sub-Saharan Africa. Its production on acid soils is constrained by aluminium (Al) stress, which primarily interferes with root growth. Sorghum cultivation is widespread in Kenya, but there is limited knowledge on response of the Kenyan sorghum cultivars to aluminium stress. The aim of the study was to identify and morphologically characterise aluminium tolerant sorghum accessions. The root growth of three hundred and eighty nine sorghum accessions from local or international sources was assessed under 148 μM Al in soaked paper towels, and 99 of these were selected and further tested in solution. Ten selected accessions were grown out in the field, on un-limed (0 t/ha) or limed (4 t/ha) acid (pH 4.3) soils with high (27%) Al saturation, and their growth and grain yield was assessed. Although the Al stress significantly (P ≤ 0.05) reduced root growth in most of the accessions, there were ten accessions; MCSRP5, MCSR 124, MCSR106, ICSR110, Real60, IS41764, MCSR15, IESV93042-SW, MCSRM45 and MCSRM79f, that retained relatively high root growth and were classified as tolerant. The stress significantly (P ≤ 0.05) reduced seedling root and shoot dry matter in the Al-sensitive accessions. Plant growth and yield on un-limed soil was very poor, and liming increased grain yield by an average 35%. Most of Kenya sorghums were sensitive to Al stress, but a few tolerant accessions were identified that could be used for further breeding for improved grain yield in high aluminium soils.

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“…[111][112][113][114][115][116][117] Single cross hybrids In acid soil with manganese toxicity, the contribution of non-additive gene effects was greater than the additive effects of genes. [116,117] Testcross hybrids…”

Section: Combining Abilities and Heritability Of Maize Genotypes For mentioning

confidence: 99%

Breeding Maize for Tolerance to Acidic Soils: A Review

et al. 2018

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Acidic soils hamper maize (Zea mays L.) production, causing yield losses of up to 69%. Low pH acidic soils can lead to aluminum (Al), manganese (Mn), or iron (Fe) toxicities. Genetic variability for tolerance to low soil pH exists among maize genotypes, which can be exploited in developing high-yielding acid-tolerant maize genotypes. In this paper, we review some of the most recent applications of conventional and molecular breeding approaches for improving maize yield under acidic soils. The gaps in breeding maize for tolerance to low soil pH are highlighted and an emphasis is placed on promoting the adoption of the numerous existing acid soil-tolerant genotypes. While progress has been made in breeding for tolerance to Al toxicity, little has been done on Mn and Fe toxicities. More research inputs are therefore required in: (1) developing screening methods for tolerance to manganese and iron toxicities; (2) elucidating the mechanisms of maize tolerance to Mn and Fe toxicities; and, (3) identifying the quantitative trait loci (QTL) responsible for Mn and Fe tolerance in maize cultivars. There is also a need to raise farmers' and other stakeholders' awareness of the problem of Al, Mn, and Fe soil toxicities to improve the adoption rate of the available acid-tolerant maize genotypes. Maize breeders should work more closely with farmers at the early stages of the release process of a new variety to facilitate its adoption level. Researchers are encouraged to strengthen their collaboration and exchange low soil pH-tolerant maize germplasm.

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Comparisons of maize populations for aluminum tolerance in nutrient solution

Cited by 17 publications

References 14 publications

Heterosis and Combining Ability for Maize Adaptation to Tropical Acid Soils: Implications for Future Breeding Strategies

Heterosis and Combining Ability for Maize Adaptation to Tropical Acid Soils: Implications for Future Breeding Strategies

Response of selected sorghum (Sorghum bicolor L. Moench) germplasm to aluminium stress

Breeding Maize for Tolerance to Acidic Soils: A Review

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