A note on the correlations between maize grain and maize stover quantitative and qualitative traits and the implications for whole maize plant optimization

Reddy, Y. Ramana; Ravi, G.; Reddy, Ch Ravinder; Prasad, K.V.S.V.; Zaidi, P.H.; Vinayan, M.T.; Blümmel, Michael

doi:10.1016/j.fcr.2013.06.013

Cited by 25 publications

(7 citation statements)

References 25 publications

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“…The two stover quality traits are reported to be highly correlated 8 , 32 , 52 and as expected most the identified putative SNPs in the current study for the two traits co-localized suggesting a common genetic control. Identifying genomic regions contributing to the traits could greatly increase their applicability and ease of integration in mainstream breeding.…”

Section: Discussionsupporting

confidence: 84%

Genome wide association study and genomic prediction for stover quality traits in tropical maize (Zea mays L.)

Vinayan

Seetharam

Babu

et al. 2021

Sci Rep

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Maize is rapidly replacing traditionally cultivated dual purpose crops of South Asia, primarily due to the better economic remuneration. This has created an impetus for improving maize for both grain productivity and stover traits. Molecular techniques can largely assist breeders in determining approaches for effectively integrating stover trait improvement in their existing breeding pipeline. In the current study we identified a suite of potential genomic regions associated to the two major stover quality traits—in-vitro organic matter digestibility (IVOMD) and metabolizable energy (ME) through genome wide association study. However, considering the fact that the loci identified for these complex traits all had smaller effects and accounted only a small portion of phenotypic variation, the effectiveness of following a genomic selection approach for these traits was evaluated. The testing set consists of breeding lines recently developed within the program and the training set consists of a panel of lines from the working germplasm comprising the founder lines of the newly developed breeding lines and also an unrelated diversity set. The prediction accuracy as determined by the Pearson’s correlation coefficient between observed and predicted values of these breeding lines were high even at lower marker density (200 random SNPs), when the training and testing set were related. However, the accuracies were dismal, when there was no relationship between the training and the testing set.

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Section: Discussionsupporting

confidence: 84%

Genome wide association study and genomic prediction for stover quality traits in tropical maize (Zea mays L.)

Vinayan

Seetharam

Babu

et al. 2021

Sci Rep

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“…Residue fodder quality analysis Two groups of maize cultivars chosen from CIMMYT maize breeding trials in Zimbabwe previously investigated for residue fodder quantity and quality traits at ILRI, India (Vivek, unpublished) were revisited: (1) advanced hybrids and (2) open-pollinated mostly landraces. Residue samples were analyzed for metabolizable energy (ME) content as described by Ramana Reddy (Ramana Reddy et al, 2013), to estimate the potential of different maize to contribute to the energy requirement of livestock. The statistical differences for the given grain and stover traits between landrace and advanced hybrid maize cultivars were assessed.…”

Section: Assessment Of a Range Of Maize Cultivars From Southernmentioning

confidence: 99%

Assessing the potential of dual-purpose maize in southern Africa: A multi-level approach

Tui

Blümmel

Valbuena

et al. 2013

Field Crops Research

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a b s t r a c tThis paper explores the potential and challenges of increasing production of food and feed on existing maize fields in mixed crop-livestock systems in the semi-arid areas of southern Africa. It integrates results from different sources of data and analysis: 1. Spatial stratification using secondary data for GIS layers: Maize mega-environments combined with recommendation domains for dual-purpose maize were constructed for Malawi, Mozambique and Zimbabwe, stratifying the countries by demand factors (livestock densities and human population densities) and feed availability. Relative biomass contributions to feed resources from rangelands were compared to those from croplands to explore the usefulness of global datasets for feed supply estimations. 2. Verification through farming systems analysis: the potential demand for maize residues as feed (maize cropping patterns, maize yields and uses, feed deficits) was compared at contrasting sites, based on household survey data collected on 480 households in 2010. 3. Maize cultivar analysis: Genotypic variability of maize cultivars was compared to evaluate the potential contribution (stover quantity and quality) of dual-purpose maize to reduce feed deficits. The study results illustrate high spatial variability in the demand for and supply of maize residues. Northern Malawi is characterized by high livestock density, high human population density and high feed availability. Farmers achieve maize yields of more than 2 t/ha resulting in surplus of residues. Although livestock is important, southwest Zimbabwe has low livestock densities, low human populations and low feed availability; farming systems are more integrated and farmers make greater use of maize residues to address feed shortages. Central Mozambique also has low cattle densities, low human populations and low feed availability. More rangelands are available but maize yields are very low and livestock face severe feed shortages. The investigation of 14 advanced CIMMYT maize landraces cultivars and 15 advanced hybrids revealed significant variations in grain and stover yield and fodder quality traits. Where livestock densities are high and alternative feed resources are insufficient, maize cultivars with superior residue yield and fodder quality can have substantial impact on livestock productivity. Cultivars at the higher end of the quality range can provide sufficient energy for providing livestock maintenance requirements and support about 200 g of live weight gain daily. Maize cultivars can be targeted according to primary constraints of demand domains for either stover quantity or stover fodder quality and the paper proposes an approach for this based on voluntary feed intake estimates for maize stover.

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“…It is an important source of food and feed within the mixed crop-livestock production systems where its dual usage is a preferred option, especially among the resource poor small-scale farmers. Since both grain and stover are highly valued products, sorghum requires whole plant improvement rather than focusing on improvement of grain or stover traits individually [2]. The vast array of untapped genetic potential within the genus offers high possibilities of obtaining appropriate parental lines for its genetic improvement [3].…”

Section: Introductionmentioning

confidence: 99%

“…Previous attempts to improve fodder quality traits in maize have been at the expense of grain traits and vice versa [4], however, [2] demonstrated that it was possible to select for high stem biomass without compromising the improvement of grain yields in sorghum. This would suggest that positive correlations between traits linked to grain and stover yields exist.…”

Section: Introductionmentioning

confidence: 99%

Phenotypic Diversity of Selected Dual Purpose Forage and Grain Sorghum Genotypes

Chikuta

Odong

Kabi

et al. 2015

AJEA

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A note on the correlations between maize grain and maize stover quantitative and qualitative traits and the implications for whole maize plant optimization

Cited by 25 publications

References 25 publications

Genome wide association study and genomic prediction for stover quality traits in tropical maize (Zea mays L.)

Genome wide association study and genomic prediction for stover quality traits in tropical maize (Zea mays L.)

Assessing the potential of dual-purpose maize in southern Africa: A multi-level approach

Phenotypic Diversity of Selected Dual Purpose Forage and Grain Sorghum Genotypes

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