QTL mapping of phosphorus efficiency and relative biologic characteristics in maize (Zea mays L.) at two sites

Chen, Junyi; Xu, Li; Cai, Yingfan; Xu, Jinrui

doi:10.1007/s11104-008-9698-x

Cited by 75 publications

(54 citation statements)

References 28 publications

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“…Assim, indiferentemente da disponibilidade de P no solo, maiores ganhos deverão ocorrer por meio do uso de estratégias de melhoramento interpopulacionais, de forma a explorar os efeitos não aditivos entre populações e os aditivos dentro de populações (Freitas Júnior et al, 2006). Esses resultados estão de acordo com os obtidos por Chen et al (2008Chen et al ( , 2009 Na análise dialélica conjunta, a presença da interação significativa CEC x A para MSP e PAP indica que não há consistência entre os efeitos não aditivos em ambas disponibilidades de P, o que indica que a seleção específica nesses ambientes capitalizaria a interação dos efeitos não aditivos x ambientes (Tabela 1). Dessa forma, o controle genético aparentemente é diferenciado nas duas situações.…”

Section: Resultsunclassified

Herança de caracteres associados à eficiência de utilização do fósforo em milho

Fritsche‐Neto

Miranda

DeLima

et al. 2010

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi identificar os efeitos genéticos que controlam a herança de caracteres associados à eficiência de utilização do fósforo (EUP) em milho e determinar as relações entre esses caracteres. Foi realizado um dialelo entre seis cultivares de milho do qual foram obtidas 15 combinações híbridas. Estas cultivares foram avaliadas em alta e baixa disponibilidade de fósforo, em casa de vegetação e campo. Foram medidas a resposta das plantas à disponibilidade de fósforo (RU) e as características associadas às eficiências de utilização e translocação do nutriente. As combinações híbridas apresentaram interação significativa com a disponibilidade de P, para os caracteres massa de matéria seca da planta (MSP), teor de P na planta (PAP) e razão entre as massas de matéria seca da parte aérea e da raiz (RMS). A interação entre capacidade geral de combinação e RU foi significativa para PAP e RMS e, entre capacidade específica de combinação e RU, para MSP e PAP. As EUP em baixa e alta disponibilidade do nutriente estiveram correlacionadas entre si e com RU. A EUP em baixa disponibilidade de P não se correlacionou com a produtividade de grãos. Contudo, sob alta disponibilidade do nutriente, esses parâmetros se correlacionaram. Os efeitos não aditivos têm maior importância para caracteres relacionados à EUP, de modo que a seleção deve ser realizada nas combinações híbridas.Termos para indexação: Zea mays, capacidade de combinação, estresse abiótico, melhoramento vegetal, nutrição mineral. Inheritance of traits associated with phosphorus utilization efficiency in maizeAbstract -The objective of this work was to determine the genetic effects that control the inheritance of characters associated with the phosphorus utilization efficiency (PUE) in maize, and to determine the relationship among them. A diallel between six maize cultivars was performed and 15 hybrid combinations were obtained from it. These cultivars were evaluated in high and low phosphorus availability in the greenhouse and field. Plant response to nutrient availability (RU) and traits associated to utilization and translocation efficiency were measured. There were significant interactions between hybrid combinations and phosphorus availability for plant dry matter mass (MSP), P concentration in plants (PAP), and the ratio between shoot and root dry matter masses (RMS). The interaction between general combining ability and P availability was significant for RMS and PAP, and the one between specific combining ability and P availability, for MSP and PAP. The PUE in low and high P were correlated with each other and with RU. The PUE at low P availability was not correlated to grain yield. However, in high soil P availability these parameters were correlated. Non additive effects are more important for traits related to PUE, so that selection should be carried out on hybrid combinations.

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Section: Resultsunclassified

Herança de caracteres associados à eficiência de utilização do fósforo em milho

Fritsche‐Neto

Miranda

DeLima

et al. 2010

Pesq. agropec. bras.

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“…1). Additionally, this genomic region is known to harbor QTLs for root development under low-P conditions (Zhu et al, 2005;Chen et al, 2008Chen et al, , 2009. As P has limited mobility in the soil, improving root development is expected to enhance P acquisition, which provides a partial explanation for the co-localization of QTLs for PUE and PAE with candidate genes controlling root morphology traits.…”

Section: Discussionmentioning

confidence: 99%

“…A few QTL studies have been performed for PUE in maize under field conditions (Chen et al, 2008(Chen et al, , 2009(Chen et al, , 2011. However, in these studies, the P efficiency indexes were calculated on the basis of the total weight of plants harvested on the 21st day after seedling emergence.…”

Section: Genetic Architecture Of Phosphorus Use Efficiency In Tropicamentioning

confidence: 99%

Genetic Architecture of Phosphorus Use Efficiency in Tropical Maize Cultivated in a Low‐P Soil

et al. 2014

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Phosphorus (P) deficiency is a major limiting factor for crop production in several countries. A better understanding of the genetic components of P use efficiency (PUE) is required to improve crop performance in low‐P soils. To date, no QTLs (quantitative trait loci) were mapped for PUE using grain yield and other late phenotypic data in tropical conditions. Thus, we evaluated the genetic architecture of PUE in tropical maize (Zea mays L.) using multiple interval mapping for design III in a population of 140 RILs (recombinant inbred lines) backcrossed with both parental lines. The parental lines contrasted for yield and for PUE, a phenotypic index that was further decomposed into P acquisition efficiency (PAE) and P utilization efficiency. Our results showed that dominance effects were more important than additive effects for explaining the variations in PUE and its components. Approximately 80% of the QTLs mapped for PAE co‐localized with those for PUE, indicating that the efficiency in acquiring P is the main determinant of PUE in tropical maize. Also, QTLs for PUE and PAE were located near to candidate genes previously associated with root development. Thus, we present important information to guide breeding strategies for the development of maize cultivars more adapted to P deficiency.

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“…Quantitative trait loci (QTL) for various root traits associated with greater acquisition of P have been identified in a number of different plant species (e.g. Wissuwa and Ae 2001;Zhu et al 2005;Beebe et al 2006;Reymond et al 2006;Chen et al 2008; and see Wissuwa et al 2009) and future progress in either applying these QTL's in breeding programs, or linking them to genes specifically associated with efficient utilization of P remains to be achieved.…”

Section: Molecular Biology Meeting Agronomic Needsmentioning

confidence: 99%

Regulating the phosphorus nutrition of plants: molecular biology meeting agronomic needs

Richardson

2009

Plant Soil

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Understanding of the phosphorus (P) nutrition of plants has been the subject of considerable research effort spanning over many decades. For soil and environmental scientists, agronomists, plant physiologists and breeders alike, there has been a common goal to better understand the physico-chemical and biological interactions of P in soil-plant systems. Factors that influence the availability, mobility and subsequent uptake and utilization of P by plants have been of particular interest.A key objective of this research effort has been to better manage this valuable soil resource in both natural systems and agricultural soils and to optimize inputs of fertilizer P for maximum agricultural benefit. Techniques in molecular biology provide new tools for addressing important questions in the understanding of plant responses to P-deficiency and are providing rapid advance in the identification and characterization of various genes that drive the efficient use of P by plants.In Plant and Soil alone a cursory search of the index using 'phosphorus' or 'phosphate' as a keyword reveals some 18% of all papers published (from a total of more than 12,000) address some aspect of plant P nutrition, ranging from the very first volume in 1948 to the current issue. In the paper by Zinn et al. (2009) reported in this issue, molecular determinants that regulate the expression of an extracellular-secreted acid phosphatase gene (LaSAP1) from white lupin (Lupinus albus L.) in response to P deficiency were investigated. The work reported by the University of Minnesota-based group provides an analysis of the promoter region of the LaSAP1 gene to identify specific DNA sequence regions and potential regulatory protein domains that are associated with control of gene expression. Such analysis provides new insight into how plants adapt and respond at a molecular level to P starvation. Along with ongoing developments in plant genomics, such information may ultimately assist in the development of plant germplasm that is more P efficient and/or for the design of management systems that allow a more sustainable utilization of soil and fertilizer P. Justifying research on the P nutrition of plantsPhosphorus is an essential nutrient required for plant growth and development and is intimately involved in a wide range of physiological and biochemical processes. This includes; cellular energy systems, structure and function of nucleic acids, membrane Plant Soil (

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QTL mapping of phosphorus efficiency and relative biologic characteristics in maize (Zea mays L.) at two sites

Cited by 75 publications

References 28 publications

Herança de caracteres associados à eficiência de utilização do fósforo em milho

Herança de caracteres associados à eficiência de utilização do fósforo em milho

Genetic Architecture of Phosphorus Use Efficiency in Tropical Maize Cultivated in a Low‐P Soil

Regulating the phosphorus nutrition of plants: molecular biology meeting agronomic needs

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