Registration of the NyH (Ny821×H99) Maize Recombinant Inbred Mapping Population

Johnson, James M.; Muttoni, German; León, Natalia de; Kaeppler, Shawn M.

doi:10.3198/jpr2014.09.0063crmp

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…To examine the relationship between seed mass and seminal root number in maize inbred lines, seeds of 60 members of a B73 × Mo17 recombinant inbred line (RIL) population ( Kaeppler et al ., 2000 ) and 95 members of an Ny821 × H99 RIL population ( Johnson et al , 2016 ) were acquired from Dr Shawn Kaeppler (University of Wisconsin, Madison, WI, USA). Average kernel mass was determined based on ten seeds, and three seeds per genotype were germinated and transferred to pouches consisting of germination paper (Anchor Paper) covered with black polyethylene and suspended in nutrient solution as described by Hund et al (2009) .…”

Section: Methodsmentioning

confidence: 99%

Increased seminal root number associated with domestication improves nitrogen and phosphorus acquisition in maize seedlings

Perkins

Lynch

2021

Annals of Botany

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Background and Aims Domesticated maize (Zea mays ssp. mays) generally forms between two and six seminal roots, while its wild ancestor, Mexican annual teosinte (Zea mays ssp. parviglumis), typically lacks seminal roots. Maize also produces larger seeds than teosinte, and it generally has higher growth rates as a seedling. Maize was originally domesticated in the tropical soils of southern Mexico, but it was later brought to the Mexican highlands before spreading to other parts of the continent, where it experienced different soil resource constraints. The aims of this study were to understand the impacts of increased seminal root number on seedling nitrogen and phosphorus acquisition and to model how differences in maize and teosinte phenotypes might have contributed to increased seminal root number in domesticated maize. Methods Seedling root system architectural models of a teosinte accession and a maize landrace were constructed by parameterizing the functional-structural plant model OpenSimRoot using plants grown in mesocosms. Seedling growth was simulated in a low-phosphorus environment, multiple low-nitrogen environments, and at variable planting densities. Models were also constructed to combine individual components of the maize and teosinte phenotypes. Key Results Seminal roots contributed about 35% of the nitrogen and phosphorus acquired by maize landrace seedlings in the first 25 days after planting. Increased seminal root number improved plant N acquisition under low-N environments with varying precipitation patterns, fertilization rates, soil textures, and planting densities. Models suggested that the optimal number of seminal roots for nutrient acquisition in teosinte is constrained by its limited seed carbohydrate reserves. Conclusions Seminal roots can improve the acquisition of both nitrogen and phosphorus in maize seedlings, and the increase in seed size associated with maize domestication may have facilitated increased seminal root number.

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Section: Methodsmentioning

confidence: 99%

Increased seminal root number associated with domestication improves nitrogen and phosphorus acquisition in maize seedlings

Perkins

Lynch

2021

Annals of Botany

View full text Add to dashboard Cite

show abstract

“…To examine the relationship between seed mass and seminal root number in maize inbred lines, seeds of 60 members of a B73 x Mo17 recombinant inbred line (RIL) population (Kaeppler et al 2000) and 95 members of a Ny821 x H99 RIL population (Johnson et al, 2016) were acquired from Dr. Shawn Kaeppler (University of Wisconsin, Madison, WI, USA). Average kernel mass was determined based on ten seeds, and three seeds per genotype were germinated and transferred to pouches consisting of germination paper (Anchor Paper) covered with black polyethylene and suspended in nutrient solution as described by Hund et al (2009).…”

Section: Recombinant Inbred Line (Ril) Experimentsmentioning

confidence: 99%

Increased seed carbohydrate reserves associated with domestication influence the optimal seminal root number ofZea mays

Perkins

Lynch

2020

Preprint

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Background and AimsDomesticated maize (Zea mays ssp. mays) generally forms between two and six seminal roots, while its wild ancestor, Mexican annual teosinte (Zea mays ssp. parviglumis), typically lacks seminal roots. Maize also produces larger seeds than teosinte, and it generally has higher growth rates as a seedling. Maize was originally domesticated in the tropical soils of southern Mexico, but it was later brought to the Mexican highlands before spreading to other parts of the continent, where it experienced different soil resource constraints. The aims of this study were to understand the impact of increased seminal root number on seedling nitrogen acquisition and to model how differences in maize and teosinte phenotypes might have contributed to increased seminal root number in domesticated maize.MethodsSeedling root architectural models of a teosinte accession and a maize landrace were constructed by parameterizing the functional-structural plant model OpenSimRoot using plants grown in mesocosms. Seedling growth was simulated in a low-phosphorus environment, multiple low-nitrogen environments, and at variable planting densities. Models were also constructed to combine individual components of the maize and teosinte phenotypes.Key ResultsSeminal roots contributed about 35% of the nitrogen and phosphorus acquired by maize landrace seedlings in the first 25 days after planting. Increased seminal root number improved plant N acquisition under low-N environments with varying precipitation patterns, fertilization rates, soil textures, and planting densities. Models suggested that the optimal number of seminal roots for nutrient acquisition in teosinte is constrained by its limited seed carbohydrate reserves.ConclusionsSeminal roots can improve the acquisition of both nitrogen and phosphorus in maize seedlings, and the increase in seed size associated with maize domestication may have facilitated increased seminal root number.

show abstract

Registration of the NyH (Ny821×H99) Maize Recombinant Inbred Mapping Population

Cited by 2 publications

References 17 publications

Increased seminal root number associated with domestication improves nitrogen and phosphorus acquisition in maize seedlings

Increased seminal root number associated with domestication improves nitrogen and phosphorus acquisition in maize seedlings

Increased seed carbohydrate reserves associated with domestication influence the optimal seminal root number ofZea mays

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