Simulation of Canopy Leaf Inclination Angle in Rice

Zhang, Xiaocui; Chuangen, Lu; Hu, Ning; Yao, Ke-min; Zhang, Qijun; Dai, Qigen

doi:10.1016/s1672-6308(13)60161-4

Cited by 10 publications

(7 citation statements)

References 3 publications

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“…This range was slightly extended in order to represent rice with high leaf chlorophyll concentration due to fertilization practices, as well as low leaf chlorophyll content caused either by possible diseases, blasts or nitrogen deficits. ALA distribution was selected for accounting specific leaf inclination during rice phenological stages (Zhang et al, 2013). In order to better constrain the retrieval to rice crops, a spectral library of underlying soil background was generated by considering signatures of homogeneous flooded and dry areas identified within rice fields in the study areas with Landsat and SPOT5 imagery, which was spectrally matched with typical rice background spectra collected by Boschetti et al (2014).…”

Section: Prosail Modelmentioning

confidence: 99%

Multitemporal and multiresolution leaf area index retrieval for operational local rice crop monitoring

Campos-Taberner

Garcı́a-Haro

Camps‐Valls

et al. 2016

Remote Sensing of Environment

167

108

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Section: Prosail Modelmentioning

confidence: 99%

Multitemporal and multiresolution leaf area index retrieval for operational local rice crop monitoring

Campos-Taberner

Garcı́a-Haro

Camps‐Valls

et al. 2016

Remote Sensing of Environment

167

108

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“…Regardless of the importance of the two characters, the high genetic diversity of these two characters may be strongly correlated to genetic factors. For example, Zhang et al (2013) reported the trend of erect and semi-erect flag leaf angles in various local rice cultivars from China. Several other studies also reported almost the same thing, such as Rabara et al (2014) for local Filipino rice, Sharma et al (2020) for local Nepalese rice and Umarani et al (2017) for local Indian rice.…”

Section: Importance Of Genetic Diversity and Its Related Factorsmentioning

confidence: 99%

Genetic diversity and relationship of Indonesian swamp rice (Oryza sativa L.) germplasm based on agro-morphological markers

2022

ANRES

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Importance of the work: Swamp rice (Oryza sativa L.) is essential germplasm for future rice breeding because of some agronomical characters or functional genes. Objectives: The genetic diversity and relationship was determined of 108 cultivars of Indonesian swamp rice using 31 agro-morphological markers to identify the distinctiveness of the characters that contributed to the genetic diversity based on Pearson correlation analysis among these characters. Materials & Methods:The standardized Shannon diversity index (H') was used to determine the genetic diversity of the germplasm. Principal components analysis (PCA) and the unweighted pair group method with arithmetic mean (UPGMA) were used to identify the distinctiveness of the characters that contributed to the genetic diversity and to reconstruct relationships. Results: This germplasm was generally low in genetic diversity (Shannon index value of 0.31 for qualitative and 0.36 for quantitative traits). However, two agro-morphological characters, namely the flag leaf attitude and culm diameter of the basal internode, had the highest diversity (H' = 0.68 and 0.97, respectively). PCA confirmed that these two characters contributed significantly to the emerging phenomenon. The culm diameter of the basal internode had a moderate correlation with panicle length and the panicle number of the primary and the secondary basal branches (r = 0.44-0.67). The UPGMA revealed that this germplasm was grouped into nine clusters, with the eighth being the largest (71 cultivars). In addition, the UPGMA revealed that some cultivars had closest relationships, such as Unyil with Karat Kaleng and Pelita Rampak versus Katimuri. Conversely, the farthest relationships were for Sawah Kanyut versus Siam Gumpal and Siam Salawi versus Siam Gumpal. Main finding: This information might be useful in future rice breeding programs, particularly in developing new rice cultivars for swamp areas.

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“…This trait is also an essential role in increasing 41-43 percent of the grain weight. It's related to the angular position (attitude) of this organ when receives sunlight (Zhang et al, 2013). Taguchi-Shiobara et al 2015stated that the flag leaf with an upright position would catch the sunlight more efficiently than the horizontal or bowing position.…”

Section: Phenotypic Diversity Of the Tidal Swamp Ricementioning

confidence: 99%

“…The result of correlation analysis shows that the grain weight greatly influenced by the panicle length, the flag leaf length, the number of tillers, the blade leaf length, and the ligule length ( Figure 3). The grain weight is one of a substantial component in determining the crop yield potency (Zhang, 2013). Hairmansis et al (2010) have considered the relationship of the tidal swamp rice of North Sumatera, Indonesia, and reported that the number of productive tillers, the number of grains per panicle and the grain fertility had a beneficial effect on this trait.…”

Section: Phenotypic Diversity Of the Tidal Swamp Ricementioning

confidence: 99%

Phenotypic diversity of the tidal swamp rice (Oryza sativa L.) germplasm from South Kalimantan, Indonesia

et al. 2019

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Tidal swamp rice is a valuable source for developing new rice cultivars in the future because they possess some important traits for, adapted to a wide range of abiotic and biotic stresses. In this study, twenty-seven cultivars of the tidal swamp rice, comprising 26 from the South Kalimantan and one of Sumatera Island, Indonesia (an outgroup), were characterized phenotypically. Following Biodiversity International procedure, 14 qualitative and 15 quantitative traits were observed. The results show that this germplasm has a unique diversity in phenotypic traits. The secondary branch of panicle was the highest diversity of qualitative traits with an index of 0.93. Similarly, the plant height was the highest for quantitative traits (0.70). The correlation analysis confirmed that plant height, strongly correlated to culm diameter, the number of tillers and grain ratio. The PCA indicated that several independent traits, such as coleoptile anthocyanin coloration, basal leaf sheath color, and grain length, have positively contributed to the diversity, accounting 62.99%. Based on PCA analysis, the tidal swamp rice were clustered into four groups. According to UPGMA, this germplasm separated into six main groups, where Sardani (an outgroup) was very closely related to Lakatan Pacar and most distantly to Siam Perak. This information would be useful for the future rice breeding program, particularly in developing new rice cultivars in the tidal swamp areas.

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Simulation of Canopy Leaf Inclination Angle in Rice

Cited by 10 publications

References 3 publications

Multitemporal and multiresolution leaf area index retrieval for operational local rice crop monitoring

Multitemporal and multiresolution leaf area index retrieval for operational local rice crop monitoring

Genetic diversity and relationship of Indonesian swamp rice (Oryza sativa L.) germplasm based on agro-morphological markers

Phenotypic diversity of the tidal swamp rice (Oryza sativa L.) germplasm from South Kalimantan, Indonesia

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