Erect panicle super rice varieties enhance yield by harvest index advantages in high nitrogen and density conditions

Tang, Liang; Gao, Hong; Hirooka, Yoshihiro; Homma, Koki; Tetsuya, Nakazaki; Liu, Tian-sheng; Shiraiwa, Tatsuhiko; Xu, Zhenbo

doi:10.1016/s2095-3119(17)61667-8

Cited by 27 publications

(26 citation statements)

References 11 publications

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“…Historically, modifying shoot architecture attributes of small grain crops, such as introduction of semi-dwarf alleles and modification of leaf angle and inflorescence morphology, has improved grain yield (Mickelson and Rasmusson 1994;Flintham et al 1997;Sakamoto et al 2006;Tang et al 2017;Heng et al 2018;Nan et al 2018). In barley and other small grain crops, shoot architecture is largely defined by the number and vigor of tillers, modified lateral branches that develop from axillary meristems (AXM) located in leaf axils near the base of the plant.…”

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confidence: 99%

Natural Genetic Variation Underlying Tiller Development in Barley (Hordeum vulgare L)

Haaning

Smith

Brown‐Guedira

et al. 2020

G3 Genes|Genomes|Genetics

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In barley (Hordeum vulgare L.), lateral branches called tillers contribute to grain yield and define shoot architecture, but genetic control of tiller number and developmental rate are not well characterized. The primary objectives of this work were to examine relationships between tiller number and other agronomic and morphological traits and identify natural genetic variation associated with tiller number and rate, and related traits. We grew 768 lines from the USDA National Small Grain Collection in the field and collected data over two years for tiller number and rate, and agronomic and morphological traits. Our results confirmed that spike row-type and days to heading are correlated with tiller number, and as much as 28% of tiller number variance was associated with these traits. In addition, negative correlations between tiller number and leaf width and stem diameter were observed, indicating trade-offs between tiller development and other vegetative growth. Thirty-three quantitative trait loci (QTL) were associated with tiller number or rate. Of these, 40% overlapped QTL associated with days to heading and 22% overlapped QTL associated with spike row-type, further supporting that tiller development is associated with these traits. Some QTL associated with tiller number or rate, including the major QTL on chromosome 3H, were not associated with other traits, suggesting that some QTL may be directly related to rate of tiller development or axillary bud number. These results enhance our knowledge of the genetic control of tiller development in barley, which is important for optimizing tiller number and rate for yield improvement.

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confidence: 99%

Natural Genetic Variation Underlying Tiller Development in Barley (Hordeum vulgare L)

Haaning

Smith

Brown‐Guedira

et al. 2020

G3 Genes|Genomes|Genetics

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“…With heavy nitrogen fertilizer, the population of R499 got lower relative temperature and lower relative humidity, which is better to build a healthy micro-climate for rice growth. Tang et al (2017) proved that DEP1 also enhanced the harvest index of erect panicle japonica rice at the moderate levels of nitrogen fertilizer. Comparing with other two panicle types, a comprehensive response index of micro-climate on nitrogen fertilizer at middle and lower position of PN -panicle number per plant; SNP -spikelet number per panicle; SF -spikelet fertility; GW -thousand-grain weight; GY -grain yield; N0 -0 kg N/ha; N1 -150 kg N/ha; N2 -150 kg/ha R499 was significantly higher under N2 treatment.…”

Section: Discussionmentioning

confidence: 92%

“…In contrast, drooping panicle rice has been reported to lodge more easily (Gao et al 1999). Tang et al (2017) reported that the correlation between harvest index and plant height was not significant in erect panicle rice, whatever the nitrogen and density. Most agricultural scientists believed that qualities of a rice plant's type and canopy structure play key roles in increasing its production and improving its quality (Zhou et al 2009, Zhu et al 2010.…”

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confidence: 98%

“…Most agricultural scientists believed that qualities of a rice plant's type and canopy structure play key roles in increasing its production and improving its quality (Zhou et al 2009, Zhu et al 2010. Therefore, more and more scientists in this area focus on the problem of optimizing phonotypical traits of rice in order to obtain ideal individuals with high or super-high production (Tang et al 2017). Recently, series cultivars of japonica rice with improved traits, such as leaf morphology, panicle type, plant height and tiller angle, were cultivated and produced a higher yield level , Chen et al 2014.…”

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confidence: 99%

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Different micro-climate response of indica rice population to nitrogen fertilizer

Yang¹,

Wang²,

Peng³

et al. 2018

Plant Soil Environ.

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Field experiment was carried out from 2014 to 2016 to clarify the micro-climate response of indica rice population to nitrogen fertilizer. R498, R816 and R499 were used as representatives of drooping panicle, semi-erect panicle and erect panicle indica rice, respectively and 3 nitrogen fertilizer levels (N0 – 0 kg N/ha; N1 – 150 kg N/ha; N2 –150 kg/ha) were set for each panicle of indica rice. Results showed that the erect panicle indica rice (R499) improved the environment of temperature, relative humidity and light of rice population under heavy nitrogen fertilizer, and built a healthier micro-climate environment for rice population, especially at the middle position of rice population. Comparing with drooping panicle indica rice (R498), erect panicle indica rice performed better under heavy nitrogen fertilizer, with a higher micro-climate response index to nitrogen fertilizer at middle and lower position in rice population. In comparison of R498, the yield of R499 increased by 0.10–0.11 t/ha under N1 treatment, while it increased by 0.93–0.96 t/ha under N2 treatment; thus, the suggestion for farmers is to plant erect panicle indica rice in heavy fertilizer area or to use more fertilizer in moderate fertilizer area.

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“…This study focused on the erect panicle type of rice as an example. The erect panicle type of rice generally provides a genetic repository for increasing biomass and harvest index, offering a sustainable yield improvement option for future breeding programs 24 . In this study, cultivar Shennong 265 showed markedly different characteristics of LAI vertical distribution compared with cultivars Nipponbare and Takanari.…”

Section: Discussionmentioning

confidence: 99%

Parameterization of the vertical distribution of leaf area index (LAI) in rice (Oryza sativa L.) using a plant canopy analyzer

Hirooka

Homma

Shiraiwa

2018

Sci Rep

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Monitoring the vertical distribution of leaf area index (LAI) is an effective method for evaluating canopy photosynthesis and biomass productivity. In this study, we proposed a novel method to characterize LAI vertical distribution non-destructively by utilizing LAI-2200 plant canopy analyzer, followed by the application of statistical moment equations. Field experiments were conducted with 5 rice cultivars under 2 fertilizer treatments in 2013 and with 3 rice cultivars under 3 plant density treatments in 2014. LAI readings obtained by a plant canopy analyzer for non-destructive stratified measurements were relatively consistent with LAI estimations using the stratified clipping method for every cultivar and treatment. The parameters calculated using the statistical moment equations numerically showed the changes in LAI vertical distribution with plant growth up to the heading stage. The differences in the parameters also quantified the effect of cultivar, fertilizer, and plant density treatments. These results suggest that the non-destructive stratified measurements and the statistical moments evaluated in this study provide quantitative, reliable information on the dynamics of LAI vertical distribution. The method is expected to be utilized by researchers in various research fields sharing common interests.

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Erect panicle super rice varieties enhance yield by harvest index advantages in high nitrogen and density conditions

Cited by 27 publications

References 11 publications

Natural Genetic Variation Underlying Tiller Development in Barley (Hordeum vulgare L)

Natural Genetic Variation Underlying Tiller Development in Barley (Hordeum vulgare L)

Different micro-climate response of indica rice population to nitrogen fertilizer

Parameterization of the vertical distribution of leaf area index (LAI) in rice (Oryza sativa L.) using a plant canopy analyzer

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