scholarly journals Quality and Grain Yield Attributes of Rwandan Rice (Oryza sativa L.) Cultivars Grown in a Biotron Applying Two NPK Levels

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Alphonsine Mukamuhirwa ◽  
Helena Persson Hovmalm ◽  
Rodomiro Ortiz ◽  
Obedi Nyamangyoku ◽  
Eva Johansson
Keyword(s):  
Grain Yield ◽  
Oryza Sativa L ◽  
Quality Attributes ◽  
Mineral Elements ◽  
Nutritional Composition ◽  
High Yield ◽  
Rice Cultivars ◽  
Yield Attributes ◽  
Yield And Quality ◽  
Grain Yield And Quality

High-yielding rice cultivars with good processing quality and rich in nutrition suitable to a changing climate are of particular importance for future rice-based food production. Here, seven Rwandan rice cultivars were grown in a climate chamber of the biotron facility at the Swedish University of Agricultural Sciences, to be evaluated for their grain yield, nutritional composition, and dough mixing properties. Two different levels of inorganic fertilizer were applied weekly from the seedling stage until flowering. Significant differences for grain yield and quality attributes were found between cultivars. Jyambere showed significantly the highest yield while Ingwizabukungu, Nemeyubutaka, and Jyambere were high in mineral elements content. Ndamirabahinzi and Mpembuke had the highest levels of TPC and TAC. Generally, the lower fertilizer dose resulted in a better performance of the cultivars for both yield and quality attributes. Significantly higher content of Fe, Ca, and Ba was found in grains from the moderate fertilizer dose, whereas K, Na, P, S, Zn, Cd, and Pb increased in grains from the higher fertilizer dose. The cultivar Ndamirabahinzi showed less variability of evaluated characters across fertilizer doses. The results from this study may be used for rice breeding of cultivars with high yield and good grain quality.

scholarly journals Generation of High Yielding and Fragrant Rice (Oryza sativa L.) Lines by CRISPR/Cas9 Targeted Mutagenesis of Three Homoeologs of Cytochrome P450 Gene Family and OsBADH2 and Transcriptome and Proteome Profiling of Revealed Changes Triggered by Mutations

Plants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 788 ◽  
Author(s):  
Babar Usman ◽  
Gul Nawaz ◽  
Neng Zhao ◽  
Yaoguang Liu ◽  
Rongbai Li
Keyword(s):  
Grain Size ◽  
Cytochrome P450 ◽  
Grain Yield ◽  
Rna Sequencing ◽  
Oryza Sativa L ◽  
Targeted Mutagenesis ◽  
High Yield ◽  
Yield And Quality ◽  
Target Sites ◽  
Cytochrome P450 Family

The significant increase in grain yield and quality are often antagonistic but a constant demand for breeders and consumers. Some genes related to cytochrome P450 family are known for rice organ growth but their role in controlling grain yield is still unknown. Here, we generated new rice mutants with high yield and improved aroma by simultaneously editing three cytochrome P450 homoeologs (Os03g0603100, Os03g0568400, and GL3.2) and OsBADH2 with the CRISPR/Cas9 system, and RNA-sequencing and proteomic analysis were performed to unveil the subsequent changes. High mutation efficiency was achieved in both target sites of each gene and the mutations were predominantly only deletions, while insertions were rare, and no mutations were detected in the five most likely off-target sites against each sgRNA. Mutants exhibited increased grain size, 2-acetyl-1-pyrroline (2AP) content, and grain cell numbers while there was no change in other agronomic traits. Transgene-DNA-free mutant lines appeared with a frequency of 44.44% and homozygous mutations were stably transmitted, and bi-allelic and heterozygous mutations followed Mendelian inheritance, while the inheritance of chimeric mutations was unpredictable. Deep RNA sequencing and proteomic results revealed the regulation of genes and proteins related to cytochrome P450 family, grain size and development, and cell cycle. The KEGG and hub-gene and protein network analysis showed that the gene and proteins related to ribosomal and photosynthesis pathways were mainly enriched, respectively. Our findings provide a broad and detailed basis to understand the role of CRISPR/Cas9 in rice yield and quality improvement.

Effects of Growth Duration on Grain Yield and Quality in Rice (Oryza sativa L.)

2012 ◽  
Vol 38 (3) ◽  
pp. 528 ◽  
Author(s):  
You-Zhong LANG ◽  
Yong-Xiu DOU ◽  
Mei-E WANG ◽  
Zu-Jian ZHANG ◽  
Qing-Sen ZHU
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Growth Duration ◽  
Yield And Quality ◽  
Grain Yield And Quality

scholarly journals Comparison of grain yield and quality of different types of japonica rice cultivars in the northern Jiangsu plain, China

2021 ◽  
Vol 20 (8) ◽  
pp. 2065-2076
Author(s):  
Jin-long BIAN ◽  
Gao-lei REN ◽  
Fang-fu XU ◽  
Hong-cheng ZHANG ◽  
Hai-yan WEI
Keyword(s):  
Grain Yield ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Yield And Quality ◽  
Different Types ◽  
Grain Yield And Quality

scholarly journals Studies on Genetic Variability of Grain Yield and Quality in F2 and F3 Generations of Aromatic Rice (Oryza sativa L.)

2020 ◽  
pp. 86-91
Author(s):  
L. Krishna ◽  
Y. Chandra Mohan ◽  
C. H. Surender Raju ◽  
D. Bhadru
Keyword(s):  
Grain Yield ◽  
Oryza Sativa L ◽  
Selection Response ◽  
Yield And Quality ◽  
Head Rice ◽  
High Heritability ◽  
High Selection ◽  
Grain Yield And Quality ◽  
F2 Generation ◽  
1000 Grain Weight

The present investigation was carried out for yield and quality related traits in the F2 and F3 populations of twenty eight rice cross combinations developed from five aromatic (Pusa 1121, Improved Pusa Basmati, Basmati 370, Sumathi and RNR 2354) and three non-aromatic (BPT 5204, Akshyadhan and NLR 145) parents. In F2 generation, among the yield characters, the highest values of phenotypic co-efficient of variation (PCV) and genotypic co-efficient of variation (GCV) were recorded for the number of filled grains/panicle followed by grain yield per plant while the lowest values were recorded for days to 50% flowering. However, for the grain quality characters the highest PCV and GCV values were recorded for head rice recovery and lowest for kernel breadth. In F3 population, higher magnitudes of PCV and GCV were recorded for the number of filled grains/panicle and panicle weight, indicating greater scope of obtaining high selection response for these traits. High heritability in narrow sense along with medium to high genetic advance was noticed for the traits like days to 50% flowering, 1000 grain weight and the kernel traits.

Responses of spring sown maize (Zea mays L.) genotypes to Aspergillus flavus inoculation: grain yield and quality attributes

2021 ◽  
Vol 53 (4) ◽  
Author(s):  
Sadia Zafar ◽  
Naeem Iqbal ◽  
Muhammad Zulqurnain Haidar ◽  
Muhammad Rafique ◽  
Muhammad Ali
Keyword(s):  
Zea Mays ◽  
Grain Yield ◽  
Aspergillus Flavus ◽  
Zea Mays L ◽  
Quality Attributes ◽  
Yield And Quality ◽  
Grain Yield And Quality

Effect of intermittent drought on grain yield and quality of rice ( Oryza sativa L.) grown in Rwanda

2019 ◽  
Vol 206 (2) ◽  
pp. 252-262
Author(s):  
Alphonsine Mukamuhirwa ◽  
Helena Persson Hovmalm ◽  
Rodomiro Ortiz ◽  
Obedi Nyamangyoku ◽  
Maria Luisa Prieto–Linde ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Yield And Quality ◽  
Grain Yield And Quality
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