Characterization of the Spikelet Number per Panicle QTL <i>qSPP7</i> Using a Nearly Isogenic Line Derived from an Interspecific Cross in Rice

Luong, Ngoc Ha; Jeon, Yun-A; Shim, Kyu-Chan; Kim, Sunha; Lee, Hyun‐Sook; Adeva, Cheryl; Thi, Van Anh Do; Ahn, Sang-Nag

doi:10.9787/pbb.2019.7.3.245

Cited by 4 publications

(4 citation statements)

References 29 publications

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“…The final DNA concentration of each sample was diluted to a working concentration of 20 ng/µL and used for PCR amplification. The PCR reaction mixture was prepared as previously described [ 36 ]. The PCR products were run on a 3% high-resolution MetaPhor agarose gel (Lonzan, Rockland, ME, USA) and visualized with a UV transilluminator.…”

Section: Methodsmentioning

confidence: 99%

Genetic Structure and Geographical Differentiation of Traditional Rice (Oryza sativa L.) from Northern Vietnam

Luong

Linh

Shim

et al. 2021

Plants

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Northern Vietnam is one of the most important centers of genetic diversity for cultivated rice. Over thousands of years of cultivation, natural and artificial selection has preserved many traditional rice landraces in northern Vietnam due to its geographic situation, climatic conditions, and many ethnic groups. These local landraces serve as a rich source of genetic variation—an important resource for future crop improvement. In this study, we determined the genetic diversity and population structure of 79 rice landraces collected from northern Vietnam and 19 rice accessions collected from different countries. In total, 98 rice accessions could be differentiated into japonica and indica with moderate genetic diversity and a polymorphism information content of 0.382. Moreover, we found that genetic differentiation was related to geographical regions with an overall PhiPT (analog of fixation index FST) value of 0.130. We also detected subspecies-specific markers to classify rice (Oryza sativa L.) into indica and japonica. Additionally, we detected five marker-trait associations and rare alleles that can be applied in future breeding programs. Our results suggest that rice landraces in northern Vietnam have a dynamic genetic system that can create different levels of genetic differentiation among regions, but also maintain a balanced genetic diversity between regions.

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Section: Methodsmentioning

confidence: 99%

Genetic Structure and Geographical Differentiation of Traditional Rice (Oryza sativa L.) from Northern Vietnam

Luong

Linh

Shim

et al. 2021

Plants

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“…Interestingly, drought did not affect this trait, despite a reduction in the number of grains. Research shows that the panicle length affects several traits, such as the number of primary branches per panicle, the number of secondary branches per panicle, and the grain density per panicle (Luong et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Assessment of mutant rice genotypes on growth cycle length and response to reduced water availability

Tejeda,

Joseph,

Venske

et al. 2024

Sci. agric. (Piracicaba, Braz.)

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Rice (Oryza sativa) is among the most important crops worldwide; however, rice crops demand high water consumption. Future projections indicate reduced water availability and severe drought events, which may affect rice crops as the cereal is highly sensitive to drought stress. Thus, cultivars with lower water demand for irrigation or drought escape capacities are among the strategies to address this issue. This study aimed to assess five mutant rice genotypes in terms of growth cycle length, other agronomic interest traits, and drought response in the reproductive stage. The mutant genotypes evaluated showed a shortening of the growth cycle compared to the original cultivar, BRS Pampeira, representing a drought escape strategy. In addition, mutations did not negatively affect plant height and crop yield. However, similar to the original cultivar, mutants are not tolerant to water deficit in the reproductive stage. The genotypes evaluated have potential to be released as early cycle cultivars, which can reduce water demand during the harvest season while presenting a drought escape strategy.

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“…Moreover, KASP markers have been utilized to identify genetic markers that are closely linked to yield-related traits in rice. For example, KASP markers have been used to identify markers linked to panicle length [30,31], grain size [32], and grain weight [33]. This study mainly uses KASP markers to improve yield by enhancing seed setting rate, a significant yield-related trait.…”

Section: Discussionmentioning

confidence: 99%

Molecular Breeding of Zheyou810, an Indica–Japonica Hybrid Rice Variety with Superior Quality and High Yield

Song,

Cui,

Fan

et al. 2023

Agriculture

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Rice heterosis has played a significant role in improving rice yields in China since the 1970s. The utilization of heterosis between the indica and japonica subspecies of rice is especially important in this regard. However, inter-subspecies hybridization between indica and japonica rice is hampered by the inadequate seed-setting rate and inferior rice quality of hybrid offspring, which has limited its development. The discovery and cloning of wide-compatibility gene S5-n and the granular starch synthase gene Wx have provided a solution to this problem, paving the way for the breeding of inter-subspecies hybrid rice. Here we demonstrated the breeding process of Zheyou810 and its performances in regional trials. Employing marker-assisted selection through the utilization of KASP (Kompetitive Allele-Specific PCR), a high-yielding and superior-quality indica–japonica hybrid rice variety named Zheyou810 was developed. Zheyou810 achieved an average yield of 10,737.75 kg/ha (12.58% higher than control Jiayou5) in the national regional trials across 2019 and 2020, and 11,777.25 kg/ha (13.36% higher than Jiayou5) in the production trial in 2020, respectively. The quality of rice has also been improved, reaching the standards set by the Ministry of Agriculture of the People’s Republic of China for Grade 3 premium rice (NY/T593). In 2021, Zheyou810 was approved by the national examination showing broad application prospects.

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Characterization of the Spikelet Number per Panicle QTL qSPP7 Using a Nearly Isogenic Line Derived from an Interspecific Cross in Rice

Cited by 4 publications

References 29 publications

Genetic Structure and Geographical Differentiation of Traditional Rice (Oryza sativa L.) from Northern Vietnam

Genetic Structure and Geographical Differentiation of Traditional Rice (Oryza sativa L.) from Northern Vietnam

Assessment of mutant rice genotypes on growth cycle length and response to reduced water availability

Molecular Breeding of Zheyou810, an Indica–Japonica Hybrid Rice Variety with Superior Quality and High Yield

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