DNA Marker-Assisted Selection Approach for Developing Flooding-Tolerant Maize

Mano, Yoshiro; Omori, Fumie; Tamaki, Hiroyuki; Mitsuhashi, Shohei; Takahashi, Wataru

doi:10.6090/jarq.50.175

Cited by 14 publications

(19 citation statements)

References 34 publications

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“…nicaraguensis have been mapped to several chromosomes (see Mano et al . ), with a QTL associated with tolerance to reduced soil conditions mapped to the long‐arm of chromosome 4. The QTL for tolerance of reduced soil conditions on a locus on chromosome 4 was not on the same chromosome as the root ROL barrier trait on chromosome 3, so the two traits appear to be under different genetic control and the mechanism of tolerance to reduced soil remains to be elucidated.…”

Section: Discussionmentioning

confidence: 99%

“…Zea nicaraguensis (Nicaraguan teosinte, Iltis & Benz ), a wild relative of maize, has been considered as a genetic resource because of its high waterlogging‐tolerance (Mano & Omori ; Mano et al . ). Z .…”

Section: Introductionmentioning

confidence: 97%

“…nicaraguensis (summarized in Mano et al . ). However, so far, no QTLs associated with root ROL barrier formation have been identified in any plant species.…”

Section: Introductionmentioning

confidence: 97%

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A major locus involved in the formation of the radial oxygen loss barrier in adventitious roots of teosinte Zea nicaraguensis is located on the short‐arm of chromosome 3

Watanabe

Takahashi

Sato

et al. 2017

Plant Cell & Environment

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A radial oxygen loss (ROL) barrier in roots of waterlogging-tolerant plants promotes oxygen movement via aerenchyma to the root tip, and impedes soil phytotoxin entry. The molecular mechanism and genetic regulation of ROL barrier formation are largely unknown. Zea nicaraguensis, a waterlogging-tolerant wild relative of maize (Zea mays ssp. mays), forms a tight ROL barrier in its roots when waterlogged. We used Z. nicaraguensis chromosome segment introgression lines (ILs) in maize (inbred line Mi29) to elucidate the chromosomal region involved in regulating root ROL barrier formation. A segment of the short-arm of chromosome 3 of Z. nicaraguensis conferred ROL barrier formation in the genetic background of maize. This chromosome segment also decreased apoplastic solute permeability across the hypodermis/exodermis. However, the IL and maize were similar for suberin staining in the hypodermis/exodermis at 40 mm and further behind the root tip. Z. nicaraguensis contained suberin in the hypodermis/exodermis at 20 mm and lignin at the epidermis. The IL with ROL barrier, however, did not contain lignin in the epidermis. Discovery of the Z. nicaraguensis chromosomal region responsible for root ROL barrier formation has improved knowledge of this trait and is an important step towards improvement of waterlogging tolerance in maize.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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A major locus involved in the formation of the radial oxygen loss barrier in adventitious roots of teosinte Zea nicaraguensis is located on the short‐arm of chromosome 3

Watanabe

Takahashi

Sato

et al. 2017

Plant Cell & Environment

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“…drained) conditions using a BC 2 F 1 or BC 4 F 1 mapping population produced by crossing maize and Z. nicaraguensis, a wild relative that shows higher tolerance than maize to soil waterlogging (Fig. 3A), revealed QTLs for constitutive aerenchyma formation located in four chromosome regions: two on chromosome 1 and one each on chromosomes 5 and 8 Omori, 2008, 2009;Mano et al, 2016). In barley, a major QTL for inducible aerenchyma formation in roots that explained 44% of the phenotypic variance is located on chromosome 4H, identified for a doubled haploid population produced from Yerong (waterlogging-tolerant) and Franklin (waterlogging-sensitive) varieties (Zhang et al, 2016).…”

Section: Genetic Basis Of the Trait For Root Aerenchyma Formationmentioning

confidence: 99%

“…Identification of the responsible genes for these QTLs will make great progress in our understanding of the molecular mechanisms that control the root aeration traits under soil waterlogging. Currently, Mano et al (2016) have been narrowing down the QTL regions in Z. nicaraguensis chromosomes by fine-mapping and developing near-isogenic lines of maize (inbred line Mi29), each possessing smaller chromosome segment(s) with one or more QTLs for these waterloggingtolerance-related root traits, and furthermore have been producing maize lines pyramiding these QTLs. The QTL pyramiding lines in maize possessing Z. nicaraguensis traits for constitutive aerenchyma, the inducible tight ROL barrier, and adventitious root formation will be expected to improve the waterlogging tolerance of maize.…”

Section: Perspectives On Future Researchmentioning

confidence: 99%

Regulation of Root Traits for Internal Aeration and Tolerance to Soil Waterlogging-Flooding Stress

et al. 2017

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Beat the stress: breeding for climate resilience in maize for the tropical rainfed environments

Cairns²,

et al. 2021

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Key message Intensive public sector breeding efforts and public-private partnerships have led to the increase in genetic gains, and deployment of elite climate-resilient maize cultivars for the stress-prone environments in the tropics. Abstract Maize (Zea mays L.) plays a critical role in ensuring food and nutritional security, and livelihoods of millions of resource-constrained smallholders. However, maize yields in the tropical rainfed environments are now increasingly vulnerable to various climate-induced stresses, especially drought, heat, waterlogging, salinity, cold, diseases, and insect pests, which often come in combinations to severely impact maize crops. The International Maize and Wheat Improvement Center (CIMMYT), in partnership with several public and private sector institutions, has been intensively engaged over the last four decades in breeding elite tropical maize germplasm with tolerance to key abiotic and biotic stresses, using an extensive managed stress screening network and on-farm testing system. This has led to the successful development and deployment of an array of elite stress-tolerant maize cultivars across sub-Saharan Africa, Asia, and Latin America. Further increasing genetic gains in the tropical maize breeding programs demands judicious integration of doubled haploidy, high-throughput and precise phenotyping, genomics-assisted breeding, breeding data management, and more effective decision support tools. Multi-institutional efforts, especially public–private alliances, are key to ensure that the improved maize varieties effectively reach the climate-vulnerable farming communities in the tropics, including accelerated replacement of old/obsolete varieties.

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DNA Marker-Assisted Selection Approach for Developing Flooding-Tolerant Maize

Cited by 14 publications

References 34 publications

A major locus involved in the formation of the radial oxygen loss barrier in adventitious roots of teosinte Zea nicaraguensis is located on the short‐arm of chromosome 3

A major locus involved in the formation of the radial oxygen loss barrier in adventitious roots of teosinte Zea nicaraguensis is located on the short‐arm of chromosome 3

Regulation of Root Traits for Internal Aeration and Tolerance to Soil Waterlogging-Flooding Stress

Beat the stress: breeding for climate resilience in maize for the tropical rainfed environments

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