Genetic Analysis of Heading Date of Japonica Rice Cultivars in Southwest China

Rice Science ◽  
2011 ◽  
Vol 18 (4) ◽  
pp. 287-296
Author(s):  
Zhen-ling ZHOU ◽  
Xiang-jin WEI ◽  
Ling JIANG ◽  
Kai LIU ◽  
Da-yong XU ◽  
...  
Keyword(s):  
Genetic Analysis ◽  
Southwest China ◽  
Heading Date ◽  
Japonica Rice ◽  
Rice Cultivars

scholarly journals Genomic Regions Involved in Differences in Eating and Cooking Quality Other than Wx and Alk Genes between indica and japonica Rice Cultivars

Rice ◽  
2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Kiyosumi Hori ◽  
Keitaro Suzuki ◽  
Haruka Ishikawa ◽  
Yasunori Nonoue ◽  
Kazufumi Nagata ◽  
...  
Keyword(s):  
Agronomic Traits ◽  
Heading Date ◽  
Rice Cultivar ◽  
Eating Quality ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Substitution Lines ◽  
Chromosome Segment Substitution Lines ◽  
Chromosome Segments

Abstract Background In temperate rice cultivation regions, japonica rice cultivars are grown preferentially because consumers deem them to have good eating quality, whereas indica rice cultivars have high grain yields and strong heat tolerance but are considered to have poor eating quality. To mitigate the effects of global warming on rice production, it is important to develop novel rice cultivars with both desirable eating quality and resilience to high temperatures. Eating quality and agronomic traits were evaluated in a reciprocal set of chromosome segment substitution lines derived from crosses between a japonica rice cultivar ‘Koshihikari’ and an indica rice cultivar ‘Takanari’. Results We detected 112 QTLs for amylose and protein contents, whiteness, stickiness, hardness and eating quality of cooked rice grains. Almost of ‘Koshihikari’ chromosome segments consistently improved eating quality. Among detected QTLs, six QTLs on chromosomes 1–5 and 11 were detected that increased whiteness and stickiness of cooked grains or decreased their hardness for 3 years. The QTLs on chromosomes 2–4 were not associated with differences in amylose or protein contents. QTLs on chromosomes 1–5 did not coincide with QTLs for agronomic traits such as heading date, culm length, panicle length, spikelet fertility and grain yield. Genetic effects of the detected QTLs were confirmed in substitution lines carrying chromosome segments from five other indica cultivars in the ‘Koshihikari’ genetic background. Conclusion The detected QTLs were associated with differences in eating quality between indica and japonica rice cultivars. These QTLs appear to be widely distributed among indica cultivars and to be novel genetic factors for eating quality traits because their chromosome regions differed from those of the GBSSI (Wx) and SSIIa (Alk) genes. The detected QTLs would be very useful for improvement of eating quality of indica rice cultivars in breeding programs.

scholarly journals Characterization of QTLs and Candidate Genes for Days to Heading in Rice Recombinant Inbred Lines

Genes ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 957 ◽  
Author(s):  
Youngjun Mo ◽  
Jong-Min Jeong ◽  
Su-Kyung Ha ◽  
Jinhee Kim ◽  
Changmin Lee ◽  
...  
Keyword(s):  
Recombinant Inbred ◽  
Recombinant Inbred Lines ◽  
Heading Date ◽  
Additive Effect ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Breeding Programs ◽  
Days To Heading ◽  
Target Environment

Understanding the gene mechanisms controlling days to heading (DH) is important in rice breeding for adaption in the target environment. Using a recombinant inbred line population derived from the cross between two japonica rice cultivars, Koshihikari and Baegilmi, we identified three consistent quantitative trait loci (QTLs) for DH for two years, qDH3, qDH6, and qDH7 on chromosomes 3, 6, and 7, respectively. While Baegilmi contributed the allele for early heading at qDH6 and qDH7 with the additive effect of five days each, Koshihikari contributed the allele for early heading at qDH3 with the additive effect of three days. Notably, pyramiding two or more alleles for early heading at these QTLs accelerated heading effectively. Sequencing of Hd16, Hd1, and Ghd7, the previously known heading date genes underlying qDH3, qDH6, and qDH7, respectively, revealed that Baegilmi and Koshihikari carry different alleles at the three genes. Molecular markers were developed to screen the allelic compositions of the three genes among 295 Korean commercial rice cultivars. The results showed that few cultivars carry alleles for early heading at the three genes, highlighting that DH can be further accelerated and fine-tuned in breeding programs by combining the desirable alleles of Hd16, Hd1, and Ghd7.

Genetic analyses of heading date of Japonica rice cultivars from Northeast China

2008 ◽  
Vol 107 (2) ◽  
pp. 147-154 ◽  
Author(s):  
Xiangjin Wei ◽  
Ling Jiang ◽  
Junfeng Xu ◽  
Wenwei Zhang ◽  
Guangwen Lu ◽  
...  
Keyword(s):  
Northeast China ◽  
Heading Date ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Genetic Analyses

scholarly journals Survey of Overwintering Trait in Chinese Rice Cultivars (Oryza Sativa L)

2021 ◽  
Author(s):  
Yongshu Liang ◽  
Junyi Gong ◽  
Yuxin Yan ◽  
Baobi Wang ◽  
Wenao Gong ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Cold Resistance ◽  
Oryza Sativa L ◽  
Heading Date ◽  
Rice Cultivar ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Cold Winter ◽  
Field Environment ◽  
New Strategies

Abstract Overwintering (OW) rice can survive through the natural cold-winter field environment, exhibit a strong root system activity, sprout from rice tillering node in the following spring, and apparently reveal the cold resistance of rice during the whole growth stage. The successful utilization of cold-resistant rice is the most economical strategy for the cold-resistant rice cultivar breeding. This work aims to identify the OW rice for the future development of cold-resistant cultivars. Altogether 1034 Chinese rice cultivars were evaluated for their responses to low temperatures under the natural field cold-winter environment. The heading date (HD, d) and plant height (PH, cm) of 1034 rice cultivars ranged from 65 to 140 d in 2019, 65 to 150 d in 2020, ranged from 60 to 140 cm in 2019, 60 to 150 cm in 2020, and displayed slight difference between 2019 and 2020. Among them, altogether 262 (25.34%) Japonica rice cultivars could withstand cold to 4°C in December 2019 and distributed in 13 provinces of China, survive through the natural cold-winter field environment, and sprout from rice tillering node in March 2020. Only 24 (2.32%) japonica rice cultivars with resistance to 0°C in January 2021 distributed in seven provinces of China could also sprout from rice tillering node in March 2021. The present cold-resistant rice cultivars will provide beneficial breeding germplasm for future cold-resistant rice breeding and new strategies in elucidating the molecular mechanism of the cold resistance of rice.

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

Evaluation of leaf physiological and biochemical traits during senescence of the wheat core collection in the southwest of China

2008 ◽  
Vol 88 (2) ◽  
pp. 331-337 ◽  
Author(s):  
Kai Shu ◽  
Pei G Luo ◽  
Huai Y Zhang ◽  
Ben J Yan ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Core Collection ◽  
Biochemical Analysis ◽  
Southwest China ◽  
Heading Date ◽  
Leaf Traits ◽  
Triticum Aestivum L ◽  
Malondialdehyde Content ◽  
Good Potential ◽  
Chinese Wheat ◽  
Physiological And Biochemical

Agronomical, physiological, and biochemical analysis of the Chinese wheat (Triticum aestivum L.) core collection revealed abundant variation in the indices examined, both within and between ecotype regions. The genotypes from the Yellow-Huai Rivers (YH) region, the Middle and lower reaches of the Yangtze River (MY) region and the Southwest China (SWC) region showed good adaptation as measured by heading date, malondialdehyde content (MDA), and superoxide dismutase (SOD) and catalase (CAT) activities and would have good potential for wheat improvement in SWC. Key words: Adaptability, core collection, diversity, leaf traits, southwest China, wheat

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.

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