Critical Factors for Grain Filling of Erect Panicle Type Japonica Rice Cultivars

2013 ◽  
Vol 105 (5) ◽  
pp. 1404-1410 ◽  
Author(s):  
Xing‐Tao Li ◽  
Hai‐Tao Cheng ◽  
Ning Wang ◽  
Cui‐Mei Yu ◽  
Lu‐Yi Qu ◽  
...  
Keyword(s):  
Grain Filling ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Critical Factors

Critical Factors for Grain Filling in Low Grain-Ripening Rice Cultivars

2006 ◽  
Vol 98 (3) ◽  
pp. 536-544 ◽  
Author(s):  
Tohru Kobata ◽  
Tomonori Nagano ◽  
Kumi Ida
Keyword(s):  
Grain Filling ◽  
Rice Cultivars ◽  
Critical Factors

scholarly journals Improving grain appearance of erect-panicle japonica rice cultivars by introgression of the null gs9 allele

2021 ◽  
Vol 20 (8) ◽  
pp. 2032-2042
Author(s):  
Dong-sheng ZHAO ◽  
Jin-yu LIU ◽  
Ai-qiu DING ◽  
Tao ZHANG ◽  
Xin-yu REN ◽  
...  
Keyword(s):  
Japonica Rice ◽  
Rice Cultivars

Identification of Novel QTLs for Spikelet Fertility, Panicle Compactness and Phytohormone Ethylene to Decipher Poor Grain Filling of Basal Spikelets in Dense Panicle Rice

2021 ◽  
Author(s):  
Sudhanshu Sekhar ◽  
Jitendra Kumar ◽  
Soumya Mohanty ◽  
Niharika Mohanty ◽  
Rudraksh Shovan Panda ◽  
...  
Keyword(s):  
Candidate Genes ◽  
Ethylene Production ◽  
Recombinant Inbred Lines ◽  
Grain Filling ◽  
Spikelet Fertility ◽  
Rice Cultivars ◽  
Spikelet Number ◽  
Spikelet Sterility ◽  
Ubiquitin Protein Ligase ◽  
Comparative Expression Analysis

Abstract High grain number is positively correlated with grain yield in rice, but it is compromised because of poor filling of basal spikelets in dense panicle bearing numerous spikelets. The phenomenon that turns the basal spikelets of compact panicle sterile in rice is largely unknown. In order to understand the factor(s) that possibly determines such spikelet sterility in compact panicle cultivars, QTLs and candidate genes were identified for spikelet fertility percentage, panicle compactness and ethylene production that significantly influence the grain filling using recombinant inbred lines developed from a cross between indica rice cultivars, PDK Shriram (compact, high spikelet number) and Heera (lax, low spikelet number). Novel QTLs, qSFP1.1, qSFP3.1 and qSFP6.1 for spikelet fertility percentage; qIGS3.2 and qIGS4.1 for panicle compactness; and qETH1.2, qETH3.1 and qETH4.1 for ethylene production were consistently identified in both kharif seasons of 2017 and 2018. The comparative expression analysis of candidate genes like ERF3, AP2-like ethylene-responsive transcription factor, EREBP, GBSS1, E3 ubiquitin-protein ligase GW2, and LRR receptor-like serine/threonine-protein kinase ERL1 associated with identified QTLs revealed their role in poor grain filling of basal spikelets in dense panicle. These candidate genes thus could be important for improving grain filling in compact-panicle rice cultivars through biotechnological interventions.

scholarly journals Integrated Analysis of Metabolome and Volatile Profiles of Germinated Brown Rice from the Japonica and Indica Subspecies

Foods ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2448
Author(s):  
Chenguang Zhou ◽  
Yaojie Zhou ◽  
Yuqian Hu ◽  
Bin Li ◽  
Roujia Zhang ◽  
...  
Keyword(s):  
Raw Materials ◽  
Indica Rice ◽  
Brown Rice ◽  
Essential Amino Acids ◽  
Integrated Analysis ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Germinated Brown Rice ◽  
Metabolomics Data ◽  
Volatile Profiles

Abstract: In the present study, germinated brown rice (GBR) from three Japonica and three Indica rice cultivars were subjected to metabolomics analysis and volatile profiling. The statistical assessment and pathway analysis of the metabolomics data demonstrated that in spite of significant metabolic changes in response to the germination treatment, the Japonica rice cultivars consistently expressed higher levels of several health-promoting compounds, such as essential amino acids and γ-aminobutyric acid (GABA), than the Indica cultivars. No clear discriminations of the volatile profiles were observed in light of the subspecies, and the concentrations of the volatile organic compounds (VOCs), including alkenes, aldehydes, furans, ketones, and alcohols, all exhibited significant reductions ranging from 26.8% to 64.1% after the germination. The results suggest that the Japonica cultivars might be desirable as the raw materials for generating and selecting GBR food products for health-conscious consumers.

scholarly journals Evaluation of Rice Responses to the Blast Fungus Magnaporthe oryzae at Different Growth Stages

Plant Disease ◽  
2019 ◽  
Vol 103 (1) ◽  
pp. 132-136 ◽  
Author(s):  
Xinglong Chen ◽  
Yulin Jia ◽  
Bo Ming Wu
Keyword(s):  
Disease Severity ◽  
Magnaporthe Oryzae ◽  
Rice Blast ◽  
Growth Stage ◽  
Disease Index ◽  
Blast Disease ◽  
Growth Stages ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Different Growth Stages

Rice blast, caused by the fungus Magnaporthe oryzae, is the most damaging disease for rice worldwide. However, the reactions of rice to M. oryzae at different growth stages are largely unknown. In the present study, two temperate japonica rice cultivars, M-202 and Nipponbare, were inoculated synchronously at different vegetative growth stages, V1 to V10. Plants of M-202 at each stage from V1 to reproductive stage R8 were inoculated with M. oryzae race (isolate) IB-49 (ZN61) under controlled conditions. Disease reactions were recorded 7 days postinoculation by measuring the percentage of diseased area of all leaves, excluding the youngest leaf. The results showed that the plants were significantly susceptible at the V1 to V4 stages with a disease severity of 26.7 to 46.8% and disease index of 18.62 to 37.76 for M-202. At the V1 to V2 stages, the plants were significantly susceptible with a disease a severity of 28.6 to 39.3% and disease index of 23.65 to 29.82 for Nipponbare. Similar results were observed when plants of M-202 were inoculated at each growth stage with a disease severity of 29.7 to 60.6% and disease index of 21.93 to 59.25 from V1 to V4. Susceptibility decreased after the V5 stage (severity 4.6% and index 2.17) and became completely resistant at the V9 to V10 stages and after the reproductive stages, suggesting that plants have enhanced disease resistance at later growth stages. These findings are useful for managing rice blast disease in commercial rice production worldwide.

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