Radiation Interception and Use Efficiency Contributes to Higher Yields of Newer Maize Hybrids in Northeast China

Zhao, Jin; Yang, Xiaoguang; Lin, Xiaomao; Sassenrath, Gretchen F.; Dai, Shuwei; Lv, Shuo; Chen, Xianfeng; Chen, Fanjun; Mi, Guohua

doi:10.2134/agronj14.0510

Cited by 29 publications

(24 citation statements)

References 24 publications

(30 reference statements)

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“…Consistent with previous studies (Colaizzi, Evett, and Howell 2011;Hao et al 2015b;Magaia et al 2017), water deficits decreased biomass at maturity, HI, and kernel weight. Instead of HI, an increase in biomass at maturity is the key driver for increased maize yield in the new hybrids (Zhao et al 2015). In this study, reduced biomass was only found at I 50 as compared to I 100 .…”

Section: Biomass Hi Kernel Weight Kernel Number and Yield Determimentioning

confidence: 49%

Yield determination of maize hybrids under limited irrigation

Zhao

Xue

Hao

et al. 2019

Journal of Crop Improvement

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Hybrid adoption, irrigation, and planting density are important factors for maize (Zea mays L.) production in semiarid regions. For this study, a 2-yr field experiment was conducted in the Texas High Plains to investigate maize yield determination, seasonal evapotranspiration (ETc), and water-use efficiency (WUE) under limited irrigation. Two hybrids (N74R, a conventional hybrid, and N75H, a drought-tolerant (DT) hybrid) were planted at three water regimes (I 100 , I 75 , and I 50 , referring to 100%, 75%, and 50% of the evapotranspiration requirement) and three planting densities (PD 6, PD 8, and PD 10, referring to 6, 8, and 10 seeds m −2 ). At I 50 , drought stress reduced grain yield by 4.78 t/ha for the conventional hybrid but only 4.22 t/ha for the DT hybrid, when compared to I 100 . Although ETc decreased at I 75 and I 50 , the highest WUE was found at I 75 . The DT hybrid did not yield more than the conventional hybrid but had greater yield stability at lower water regimes and extracted less soil water. Drought decreased biomass, harvest index, and kernel weight but did not affect kernel number. Higher planting densities increased biomass and kernel number but decreased kernel weight. Kernel number and kernel weight of the conventional hybrid were more sensitive to planting density than the DT hybrid. These data demonstrated that limited irrigation at I 75 is an effective way to save water and maintain the maize yield in semiarid areas, and that DT hybrid shows a greater yield stability to plant density under water stress. ARTICLE HISTORY

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Section: Biomass Hi Kernel Weight Kernel Number and Yield Determimentioning

confidence: 49%

Yield determination of maize hybrids under limited irrigation

Zhao

Xue

Hao

et al. 2019

Journal of Crop Improvement

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“…, Zhao et al. ). Under drought conditions, even though there were no differences in RUE and BM pm between the two hybrids, P1151HR produced more biomass during the post‐silking period than 33D49, which finally resulted in greater grain yield in P1151HR than in 33D49.…”

Section: Discussionmentioning

confidence: 99%

Radiation‐Use Efficiency, Biomass Production, and Grain Yield in Two Maize Hybrids Differing in Drought Tolerance

Hao

Xue

Marek

et al. 2015

J Agronomy Crop Science

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Drought-tolerant (DT) maize (Zea mays L.) hybrids have potential to increase yield under drought conditions. However, little information is known about the physiological determinations of yield in DT hybrids. Our objective was to assess radiation-use efficiency (RUE), biomass production, and yield in two hybrids differing in drought tolerance. Field experiments were conducted in 2013 and 2014 with two hybrids, P1151HR (DT hybrid) and 33D49 (conventional hybrid) under well-watered (I 100 ) and drought (I 50 ) conditions. I 100 and I 50 refer to 100 % and 50 % evapotranspiration requirement, respectively. On average, P1151HR yielded 11-27 % greater than 33D49 at I 100 and about 40 % greater at I 50 , At I 100 , greater yield in P1151HR was due to greater biomass at physiological maturity (BM pm ) resulting from greater post-silking biomass accumulation (BM post ). At I 50 , both hybrids had similar BM pm but P1151HR showed a higher harvest index and greater BM post . RUE differed significantly (P < 0.05) between the hybrids at I 100 , but not at I 50 . At I 100 , the RUE values for P1151HR and 33D49 were 4.87 and 4.28 g MJ À1 in 2013, and 3.71 and 3.48 g MJ À1 in 2014. At I 50 , the mean RUE was 3.89 g MJ À1 in 2013 and 3.16 g MJ À1 in 2014. Results indicate that BM post is important for maintaining high yield in DT maize.

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“…Simulation (Duncan et al, 1967; Hammer et al, 2009) and empirical evidence (Lee and Tollenaar, 2007; Zhao et al, 2015) suggest that upright LAs combined with higher planting densities improve light distribution within the canopy. For example, modern hybrids intercept 14% more light than older hybrids (Lee and Tollenaar, 2007), and the increased light intercepted from leaves near the ear is positively correlated with grain yield (Ma et al, 2014; Zhao et al, 2015). Furthermore, modeling has suggested that LAs should gradually transition from upright in the upper canopy to less upright in the lower as this configuration would distribute solar energy across multiple leaves while maximizing the total solar energy absorbed by the canopy (Duncan et al, 1967; Zhu et al, 2010).…”

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confidence: 96%

Dissection of Leaf Angle Variation in Maize through Genetic Mapping and Meta‐Analysis

Dzievit

2019

The Plant Genome

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Core Ideas Twelve QTL were discovered for maize leaf angle variation in the lower canopy. A consistently detected QTL explained 10 to 17% of the phenotypic variance on chromosome 1. Meta‐analysis identified 58 genomic bins containing 33 candidate genes. Maize (Zea mays L.) hybrids have transitioned to upright leaf angles (LAs) over the last 50 yr as maize yields and planting densities increased concurrently. Genetic mapping and a meta‐analysis were conducted in the present study to dissect genetic factors controlling LA variation. We developed mapping populations using inbred lines B73 (Iowa Stiff Stalk Synthetic), PHW30 (Iodent, expired plant variety protection inbred), and Mo17 (Non‐Stiff Stalk) that have distinct LA architectures and represent three important heterotic groups in the United States. These populations were genotyped using genotyping‐by‐sequencing (GBS), and phenotyped for LA in the F2 and F2:3 generation. Inclusive composite interval mapping across the two generations of the mapping populations revealed 12 quantitative trait loci (QTL), and a consistent QTL on chromosome 1 explained 10 to 17% of the phenotypic variance. To gain a comprehensive understanding of natural variations underlying LA variation, these detected QTL were compared with results from 19 previous studies. In total, 495 QTL were compiled and mapped into 143 genomic bins. A meta‐analysis revealed that 58 genomic bins were associated with LA variation. Thirty‐three candidate genes were identified in these genomic bins. Together, these results provide evidence of QTL controlling LA variation from inbred lines representing three important heterotic groups in the United States and a useful resource for future research into the molecular variants underlying specific regions of the genome associated with LA variation.

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Radiation Interception and Use Efficiency Contributes to Higher Yields of Newer Maize Hybrids in Northeast China

Cited by 29 publications

References 24 publications

Yield determination of maize hybrids under limited irrigation

Yield determination of maize hybrids under limited irrigation

Radiation‐Use Efficiency, Biomass Production, and Grain Yield in Two Maize Hybrids Differing in Drought Tolerance

Dissection of Leaf Angle Variation in Maize through Genetic Mapping and Meta‐Analysis

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