Genetic variation in seminal and nodal root angle and their association with grain yield of maize under water-stressed field conditions

Ali, Muhammad Mooneeb; Luetchens, Jon; Nascimento, Josiel; Shaver, Timothy M.; Kruger, Greg R.; Lorenz, Aaron J.

doi:10.1007/s11104-015-2554-x

Cited by 51 publications

(32 citation statements)

References 51 publications

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“…Maize genotypes with vigorous root systems early in plant development were shown to have larger root systems at maturity ( Nass and Zuber, 1971 ). Ali et al (2015) showed that seminal root angle (collected at V1) correlated well with nodal root angle collected at a later stage (V6) in a collection of maize hybrids. However, the same authors showed that root angle correlated with grain yield in water stress conditions while the number of seminal roots did not.…”

Section: Discussionmentioning

confidence: 86%

“…It would be interesting to verify the above-described pattern of seminal root architecture in diverse maize germplasm, also in view of the large diversity in seminal root number, and seed morphology and size. This information could be important to better tune new root ideotypes for breeding purposes, given the recently reported correlation between the growth angle of seminal roots, angle of nodal roots, and grain yield under drought conditions ( Ali et al , 2015 ).…”

Section: Discussionmentioning

confidence: 99%

“…The number of seminal roots ranges between 0 and 13 among maize accessions, with the lowest numbers more common in Flint-related genotypes ( Kiesselbach, 1949 ; Burton et al , 2013 ; Lynch, 2013 ). However, the range of variation was notably lower when elite materials were considered, ranging between 0 and ~7 seminal roots in a collection of 74 elite inbred lines ( Kumar et al , 2012 ) or between two and four in a collection of 19 elite F 1 hybrids ( Ali et al , 2015 ). Fewer seminal roots were detected in teosinte as compared with maize ( Burton et al , 2013 ).…”

Section: Introductionmentioning

confidence: 99%

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Two major quantitative trait loci controlling the number of seminal roots in maize co-map with the root developmental genesrtcsandrum1

Salvi

Giuliani

Ricciolini

et al. 2016

EXBOTJ

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Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Two major quantitative trait loci controlling the number of seminal roots in maize co-map with the root developmental genesrtcsandrum1

Salvi

Giuliani

Ricciolini

et al. 2016

EXBOTJ

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show abstract

“…Deeper roots are an important strategy to access water stored deep in the soil, and the utility of rooting depth for drought tolerance is well-documented in maize, rice, and wheat (Wasson et al, 2012 ; Lynch, 2013 ; Uga et al, 2013 ). Root angle is widely recognized to play an important role in determining rooting depth, and steep growth angles are superior for water acquisition under drought (Mace et al, 2012 ; Lynch, 2013 ; Ali et al, 2015 ). In cereal crops, deeper rooting is achieved by a combination of the root growth angle, root length, root diameter, and root number (Lynch, 2013 ; Ali et al, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

“…Root angle is widely recognized to play an important role in determining rooting depth, and steep growth angles are superior for water acquisition under drought (Mace et al, 2012 ; Lynch, 2013 ; Ali et al, 2015 ). In cereal crops, deeper rooting is achieved by a combination of the root growth angle, root length, root diameter, and root number (Lynch, 2013 ; Ali et al, 2015 ). The root growth angle determines the direction of root elongation (Ali et al, 2015 ), larger root diameter can increase the ability of the root to penetrate deeper soil strata (Lynch, 2013 ), and low CRNs in maize can improve drought tolerance by increasing rooting depth (Gao and Lynch, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

QTL-By-Environment Interaction in the Response of Maize Root and Shoot Traits to Different Water Regimes

Zhang

et al. 2018

Front. Plant Sci.

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Drought is a major abiotic stress factor limiting maize production, and elucidating the genetic control of root system architecture and plasticity to water-deficit stress is a crucial problem to improve drought adaptability. In this study, 13 root and shoot traits and genetic plasticity were evaluated in a recombinant inbred line (RIL) population under well-watered (WW) and water stress (WS) conditions. Significant phenotypic variation was observed for all observed traits both under WW and WS conditions. Most of the measured traits showed significant genotype–environment interaction (GEI) in both environments. Strong correlations were observed among traits in the same class. Multi-environment (ME) and multi-trait (MT) QTL analyses were conducted for all observed traits. A total of 48 QTLs were identified by ME, including 15 QTLs associated with 9 traits showing significant QTL-by-Environment interactions (QEI). QTLs associated with crown root angle (CRA2) and crown root length (CRL1) were identified as having antagonistic pleiotropic effects, while 13 other QTLs showed signs of conditional neutrality (CN), including 9 and 4 QTLs detected under WW and WS conditions, respectively. MT analysis identified 14 pleiotropic QTLs for 13 traits, SNP20 (1@79.2 cM) was associated with the length of crown root (CR), primary root (PR), and seminal root (SR) and might contribute to increases in root length under WS condition. Taken together, these findings contribute to our understanding of the phenotypic and genotypic patterns of root plasticity in response to water deficiency, which will be useful to improve drought tolerance in maize.

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Film mulching optimizes the early root and shoot development of rain‐fed spring maize

Liang

Yuan

et al. 2020

Agronomy Journal

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Full ridge‐furrow plastic film‐mulching (FM) is a key agriculture drought mitigation technique in the semiarid Loess Plateau of China. The establishment of high‐yield maize (Zea mays L.) population under FM is built on robust plant development and indispensable soil support that generally started from the seedling stage. However, there is still a lack of information on the root‐shoot development of maize seedling under FM. A 2‐yr field experiment was performed in rainfed plots of Loess Plateau experimental station to study the effects of FM on root‐shoot growth of maize seedlings. Root samples were harvested from different soil layers until max rooting depth at V3 and V6 stages to detail the vertical development. Our results implied that FM significantly improved soil hydrothermal conditions and canopy development at V3 and V6 stages. At the V3 stage, there was no significant difference in root biomass between treatments or growth seasons, but root length under FM treatment was decreased by about 17%; moreover, ridge‐furrow without mulching (CK) treatment intended to distribute 4–9% more root biomass in deeper soil layers, and the root biomass per unit length under FM treatment was increased. At the V6 stage, FM brought about significant advantages in root biomass and length. Nonetheless, maize seedlings under FM treatment had a consistently lower root/shoot ratio, higher root efficiency, and higher water use efficiency during the V3–V6 period. In conclusion, FM helped rainfed maize seedlings run a lightweight but high‐efficiency root to support its productive shoot since the very beginning.

show abstract

Genetic variation in seminal and nodal root angle and their association with grain yield of maize under water-stressed field conditions

Cited by 51 publications

References 51 publications

Two major quantitative trait loci controlling the number of seminal roots in maize co-map with the root developmental genesrtcsandrum1

Two major quantitative trait loci controlling the number of seminal roots in maize co-map with the root developmental genesrtcsandrum1

QTL-By-Environment Interaction in the Response of Maize Root and Shoot Traits to Different Water Regimes

Film mulching optimizes the early root and shoot development of rain‐fed spring maize

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