scholarly journals Characteristics Relating Young Panicle Development and Heading of Closely Related Calrose Rice Genotypes.

1991 ◽  
Vol 60 (2) ◽  
pp. 298-305
Author(s):  
Akio MATSUZAKI ◽  
J.Neil RUTGER
Keyword(s):  
Panicle Development ◽  
Young Panicle ◽  
Rice Genotypes

scholarly journals OsSPL9 Regulates Grain Number and Grain Yield in Rice

2021 ◽  
Vol 12 ◽  
Author(s):  
Li Hu ◽  
Weilan Chen ◽  
Wen Yang ◽  
Xiaoling Li ◽  
Cheng Zhang ◽  
...  
Keyword(s):  
Grain Yield ◽  
Haplotype Analysis ◽  
Rice Grain ◽  
Grain Number ◽  
Terminal Flower ◽  
Panicle Development ◽  
Young Panicle ◽  
Squamosa Promoter Binding Protein ◽  
Terminal Flower 1 ◽  
Grain Number Per Panicle

Rice grain yield consists of several key components, including tiller number, grain number per panicle (GNP), and grain weight. Among them, GNP is mainly determined by panicle branches and spikelet formation. In this study, we identified a gene affecting GNP and grain yield, OsSPL9, which encodes SQUAMOSA-PROMOTER BINDING PROTEIN-LIKE (SPL) family proteins. The mutation of OsSPL9 significantly reduced secondary branches and GNP. OsSPL9 was highly expressed in the early developing young panicles, consistent with its function of regulating panicle development. By combining expression analysis and dual-luciferase assays, we further confirmed that OsSPL9 directly activates the expression of RCN1 (rice TERMINAL FLOWER 1/CENTRORADIALIS homolog) in the early developing young panicle to regulate the panicle branches and GNP. Haplotype analysis showed that Hap3 and Hap4 of OsSPL9 might be favorable haplotypes contributing to high GNP in rice. These results provide new insights on high grain number breeding in rice.

Phosphorus fertilization in inbred and hybrid rice

1970 ◽  
Vol 19 (2) ◽  
pp. 181-187
Author(s):  
MR Islam ◽  
PK Saha ◽  
SK Zaman ◽  
MJ Uddin
Keyword(s):  
Grain Yield ◽  
Key Words ◽  
Hybrid Rice ◽  
Phosphorus Fertilization ◽  
Phosphorus Fertilizer ◽  
Yield Difference ◽  
P Balance ◽  
Rice Genotypes ◽  
Boro Rice

Five phosphorus rates (0, 5, 10, 20 and 30 kg P/ha) were tested with four rice genotypes in Boro (BRRI dhan36, BRRI dhan45, EH1 and EH2) and T. Aman (BRRI dhan30, BRRI dhan49, EH1 and EH2) season. Phosphorus rates did not influence grain yield irrespective of varieties in T. Aman season while in Boro season P response was observed among the P rates. Application of P @ 10 kg/ha significantly increased the grain yield. But when P was applied @ 20 and 30 kg P/ha, the grain yield difference was not significant. The optimum and economic rate of P for T. Aman was 20 kg P/ha but in Boro rice the optimum and economic doses of P were 22 and 30 kg/ha, respectively. Hybrid entries (EH1 and EH2) used P more efficiently than inbred varieties. A negative P balance was observed up to 10 kg P/ha. Key words: Response; Phosphorus fertilizer; Inbred; Hybrid rice DOI: http://dx.doi.org/10.3329/dujbs.v19i2.8962 DUJBS 2010; 19(2): 181-187

Molecular Characterization and Genetic Diversity Study in F3 Population of Rice

2013 ◽  
Vol 20 (1-2) ◽  
pp. 1-8
Author(s):  
MM Rahman ◽  
L Rahman ◽  
SN Begum ◽  
F Nur
Keyword(s):  
Genetic Distance ◽  
Gene Diversity ◽  
Random Amplified Polymorphic Dna ◽  
Molecular Genetic ◽  
Molecular Genetic Analysis ◽  
Polymorphic Loci ◽  
Rice Genotypes ◽  
High Level ◽  
Genetic Diversity Study ◽  
Diversity Study

Random Amplified Polymorphic DNA (RAPD) assay was initiated for molecular genetic analysis among 13 F3 rice lines and their parents. Four out of 15 decamer random primers were used to amplify genomic DNA and the primers yielded a total of 41 RAPD markers of which 37 were considered as polymorphic with a mean of 9.25 bands per primer. The percentage of polymorphic loci was 90.24. The highest percentage of polymorphic loci (14.63) and gene diversity (0.0714) was observed in 05-6 F3 line and the lowest polymorphic loci (0.00) and gene diversity (0.00) was found in 05-12 and 05-15 F3 lines. So, relatively high level of genetic variation was found in 05-6 F3 line and it was genetically more diverse compared to others. The average co-efficient of gene differentiation (GST) and gene flow (Nm) values across all the loci were 0.8689 and 0.0755, respectively. The UPGMA dendrogram based on the Nei’s genetic distance differentiated the rice genotypes into two main clusters: PNR-519, 05-19, 05-14, 05-12 and 05-17 grouped in cluster 1. On the other hand, Baradhan, 05-9, 05-13, 05-11, 05-5, 05-6, 05-1, 05-4, 05-15 and 05-25 were grouped in cluster 2. The highest genetic distance (0.586) was found between 05-4 and 05-17 F3 lines and they remain in different cluster.DOI: http://dx.doi.org/10.3329/pa.v20i1-2.16839 Progress. Agric. 20(1 & 2): 1 – 8, 2009

Screening of rice genotypes for resistance to the brown planthopper, Nilaparvata lugens Stål

2012 ◽  
Vol 40 (4) ◽  
pp. 502-508 ◽  
Author(s):  
M. P. Ali ◽  
Salem S. Alghamdi ◽  
M. A. Begum ◽  
A. B. M. Anwar Uddin ◽  
M. Z. Alam ◽  
...  
Keyword(s):  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Rice Genotypes

Effects of PEG induced water stress on growth and physiological responses of rice genotypes at seedling stage

2019 ◽  
Vol 51 (6) ◽  
Author(s):  
A. Shereen ◽  
M.A. Khanzada ◽  
M.A. Wahid Baloch ◽  
Asma Asma ◽  
M.U. Shirazi ◽  
...  
Keyword(s):  
Water Stress ◽  
Physiological Responses ◽  
Seedling Stage ◽  
Rice Genotypes

Physiological Response to 1,2,4-Trichlorobenzene Stress of Different Rice Genotypes in Seedlings

2009 ◽  
Vol 35 (4) ◽  
pp. 733-740 ◽  
Author(s):  
Guo-Liang ZHANG ◽  
Wen-Jun CHEN ◽  
Li-Min QIU ◽  
Guo-Rong SUN ◽  
Qi-Gen DAI ◽  
...  
Keyword(s):  
Physiological Response ◽  
Rice Genotypes

Effects of Growth-period Type and Nitrogen Application Level on the RVA Profile Characteristics for Japonica Rice Genotypes

2013 ◽  
Vol 38 (2) ◽  
pp. 293-300 ◽  
Author(s):  
Min LI ◽  
Hong-Cheng ZHANG ◽  
Guo-Ye LI ◽  
Qun MA ◽  
Xiong YANG ◽  
...  
Keyword(s):  
Growth Period ◽  
Nitrogen Application ◽  
Rice Genotypes ◽  
Profile Characteristics
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