| 8 matches found in 6 documents. Search time: 0.477 seconds. |
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Score: 3.00 |
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| Title: OsSPL14 promotes panicle branching and higher grain productivity in rice .
| | Author: Miura K Ikeda M Matsubara A Song XJ Ito M Asano K Matsuoka M Kitano H Ashikari M | | Journal: Nat Genet Citation: V : 42 P : 545-9 Year: 2010 Type: MEDLINE | | Literature: oryza Field: abstract Doc ID: pub20495564 Accession (PMID): 20495564 | | Abstract: Identification of alleles that improve crop production and lead to higher-yielding varieties are needed for food security .
Here we show that the quantitative trait locus WFP ( WEALTHY FARMERS PANICLE ) encodes OsSPL14 ( SQUAMOSA PROMOTER BINDING PROTEIN-LIKE 14 , also known as IPA1 ) .
Higher expression of OsSPL14 in the reproductive stage promotes panicle branching and higher grain yield in rice .
OsSPL14 controls shoot branching in the vegetative stage and is affected by microRNA excision .
We also demonstrate the feasibility of using the OsSLP14 ( WFP ) allele to increase rice crop yield .
Introduction of the high-yielding OsSPL14 ( WFP ) allele into the standard rice variety Nipponbare resulted in increased rice production .
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[ Sen. 2, subscore: 1.00 ]: Here we show that the quantitative trait locus WFP ( WEALTHY FARMERS PANICLE ) encodes OsSPL14 ( SQUAMOSA PROMOTER BINDING PROTEIN-LIKE 14 , also known as IPA1 ) .
[ Sen. 5, subscore: 1.00 ]: We also demonstrate the feasibility of using the OsSLP14 ( WFP ) allele to increase rice crop yield .
[ Sen. 6, subscore: 1.00 ]: Introduction of the high-yielding OsSPL14 ( WFP ) allele into the standard rice variety Nipponbare resulted in increased rice production .
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Score: 2.00 |
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| Title: Fine mapping of f5-Du , a gene conferring wide-compatibility for pollen fertility in inter-subspecific hybrids of rice ( Oryza sativa L ) .
| | Author: Wang GW He YQ Xu CG Zhang Q | | Journal: Theor . Appl . Genet . Citation: V : 112 ( 2 ) P : 382-7 Year: 2006 Type: ARTICLE | | Literature: oryza Field: abstract Doc ID: pub16317572 Accession (PMID): 16317572 | | Abstract: Wide-compatibility varieties ( WCVs ) , comprising a special class of rice germplasm , are able to produce fertile hybrids when crossed with both indica and japonica varieties .
Dular , a landrace variety from India , has both a wide spectrum and high level of wide-compatibility when crossed with a range of indica and japonica varieties .
In previous studies , an allele at the f5 locus from Dular ( f5-Du ) was identified as a neutral allele conferring wide-compatibility with a large effect on both pollen and spikelet fertility .
Using a population of 1993 hybrid plants derived from a cross between ZS ( f5-Du/f5-ZS ) ( F1 of near isogenic line of Zhenshan 97 containing f5-Du ) and Balilla ( a japonica tester ) , f5-Du was genetically mapped to an interval of about 1 . 6 cM , with 0 . 8 cM from both SSR markers WFPM3 and WFPR1 .
Combined with bioinformatic analysis , a contig map was constructed for the f5 region , consisting of five bacterial artificial chromosome ( BAC ) or P1 artificial chromosome ( PAC ) clones and spanning approximately 437 kb in length .
By assaying the recombinant events in the region with markers developed using the sequence information , the f5 locus was further narrowed down to a 70 kb fragment containing nine predicted genes .
The result will be very useful for cloning this gene and marker-assisted transferring of the neutral allele in rice breeding programs . | Matching Sentences:
[ Sen. 4, subscore: 2.00 ]: Using a population of 1993 hybrid plants derived from a cross between ZS ( f5-Du/f5-ZS ) ( F1 of near isogenic line of Zhenshan 97 containing f5-Du ) and Balilla ( a japonica tester ) , f5-Du was genetically mapped to an interval of about 1 . 6 cM , with 0 . 8 cM from both SSR markers WFPM3 and WFPR1 .
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Score: 1.00 |
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| Title: Nitrate pollution in groundwater and strategies to reduce pollution .
| | Author: Shrestha RK Ladha JK .
| | Journal: Water Sci . Technol . Citation: V : 45 ( 9 ) P : 29-35 Year: Type: ARTICLE | | Literature: oryza Field: abstract Doc ID: pub12079116 Accession (PMID): 12079116 | | Abstract: The input-intensive rainfed tropical ecosystem , where wet season ( WS ) rice ( Oriza sativa L ) -dry season ( DS ) diversified high-value upland crops like vegetables predominate , has resulted in a problem of a large leakage of N into the environment , thereby polluting the water .
Excessive use of N fertilizer in high-value crops grown in DS is economically motivated .
Out of twenty water sources evaluated in a watershed with a total area of 265 ha located in Magnuang , Ilocos Norte , Philippines , twelve had near or above the World Health Organizations ( WHO ) NO3-N limit for drinking water of 10 ppm .
Soil mineral N ( upper 100 cm ) observed in seven rice-sweet pepper ( Capsicum annuum L ) farmers fields ranged from 111 to 694 kg ha ( -1 ) which decreased by 10 to 68% in plots with dry-to-wet ( DTW ) crops like indigo , indigo+mungo and corn .
In fallow plots where mineral N was either maintained or increased , it showed movement to lower soil profiles demonstrating NO3 leaching without a crop .
On average , maize ( Zea mays L ) captured 176 kg N ha ( -1 ) and indigo ( Indigofera tinctoria L ) 194 kg N ha ( -1 ) .
In both fallow and planted plots , mineral N declined to low levels at 100% water-filled pore spaces ( WFPS ) before rice transplanting .
A strategy for including indigo plus maize as a N-catch crop is proposed to decrease NO3 leaching and maximize N use efficiency in a rice-sweet pepper cropping system . | Matching Sentences:
[ Sen. 7, subscore: 1.00 ]: In both fallow and planted plots , mineral N declined to low levels at 100% water-filled pore spaces ( WFPS ) before rice transplanting .
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Score: 1.00 |
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| Title: [ N2O emission from rice-rapeseed rotation system in Chengdu Plain of Sichun Basin ] | | Author: Yu YJ Zhu B Wang XG Xiang HY Zheng XH | | Journal: Ying Yong Sheng Tai Xue Bao Citation: V : 19 P : 1277-82 Year: 2008 Type: MEDLINE | | Literature: oryza Field: abstract Doc ID: pub18808020 Accession (PMID): 18808020 | | Abstract: By using static chamber/gas chromatograph techniques , the N2O emission from rice-rapeseed rotation system in Chengdu Plain of Sichuan Basin was measured from June 2005 to June 2006 , with its characteristics and affecting factors investigated .
The results showed that the total emission of N2O in a rotation cycle was ( 8 . 3 +/- 2 . 8 ) kg x hm ( -2 ) x a ( -1 ) , and the emission in rice season , rapeseed season and fallow season accounted for 30% , 65% , and 5% of the total , respectively .
In rice season , the mean N2O flux was higher during alternative drainage and irrigation than during continuous flooding and drainage , and was roughly the same during continuous flooding and drainage .
N application was the main driving factor for the appearance of N2O emission peak , and the lower moisture content in surface soil layer in rapeseed season and fallow season was the main cause inducing soil N2O absorption .
Soil moisture , soil temperature , N application , and crop involvement affected the N2O emission to various extents , and soil moisture was the key factor affecting the N2O emission .
To avoid the high frequency of dry and wet alternation in rice season or to regulate soil moisture content to a level of 50%-70% WFPS ( percentage of water-filled pore space ) in rapeseed season and fallow season could effectively decrease the N2O emission from the rice-rapeseed rotation system .
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[ Sen. 6, subscore: 1.00 ]: To avoid the high frequency of dry and wet alternation in rice season or to regulate soil moisture content to a level of 50%-70% WFPS ( percentage of water-filled pore space ) in rapeseed season and fallow season could effectively decrease the N2O emission from the rice-rapeseed rotation system .
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Score: 1.00 |
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| Title: [ Observation for CH4 and N2O emissions under different rates of nitrogen and phosphate fertilization in double rice fields ] .
| | Author: Shi SW Li YE Wan YF Qin XB Gao QZ | | Journal: Huan Jing Ke Xue Citation: V : 32 P : 1899-907 Year: 2011 Type: In-Process | | Literature: oryza Field: abstract Doc ID: pub21922807 Accession (PMID): 21922807 | | Abstract: Two non-CO2 greenhouse gas emissions ( methane and nitrous oxide ) and related environmental factors were measured within rice growing season under five treatments including non-fertilization ( CK ) , balanced fertilization ( BF ) , decreased nitrogen and phosphate 1 ( DNP1 ) , decreased nitrogen and phosphate 2 ( DNP2 ) and increased nitrogen and phosphate 1 ( INP ) in double rice fields of red clay soil in 2009 , using the method of static chamber-gas chromatograph techniques .
The results showed that the average CH4 emission fluxes for treatments of BF , DNP1 , DNP2 and INP were 4 . 57 , 5 . 42 , 4 . 70 and 4 . 65 mg x ( m2 x h ) ( -1 ) during early rice growing period , which increased by 39% , 49% , 41% and 40% compared with non-fertilizer treatment , respectively .
The average CH4 emission fluxes in late rice growing season was higher than preseasons .
Compared to CK , CH4 emission increased by 11% , 1% , 26% and - 4% in treatments of BF , DNP1 , DNP2 and INP within late rice growing season .
Applying nitrogen and phosphate enhanced CH4 emission in turning green period for early and late rice .
No significant difference was observed between the CH4 emissions of five treatments during early and late rice growing season ( p > 0 . 05 ) .
N2O emission was very little during mid-seasonal drainage period .
In contrast , N2O emission peaks were observed in period of alternation of wetting and drying after mid-seasonal drainage in this experiment .
N2O emission was , on average , equivalent to 0 . 18% of the nitrogen applied in double rice growing season .
Statistically , air temperature , soil Eh and soil moisture ( water-filled pore space , WFPS ) at 0-10cm depth significantly affected the fluctuations of the seasonal CH4 flux , but no significant correlationship has been found between N2O flux and related environmental factors .
CH4 was the dominated greenhouse gas in double rice fields which contributed approximately 90% for the integrated global warming potential of CH4 and N2O released during the rice growing season .
Therefore , the mitigation options should focus on how to reduce CH4 emission in local area .
The result indicates that BF is a recommended fertilization method for early rice production , and a optimum fertilization for late season can increase rates of nitrogen and phosphate fertilizers on the basis of BF treatment slightly by considering total global warming potential and grain yield .
The rates of BF treatment were 150-90-90 kg x hm ( -2 ) N-P2O5-K2O for early rice , and 180-90-135 kg x hm ( -2 ) N-P2O5-K2O for late rice , respectively .
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[ Sen. 10, subscore: 1.00 ]: Statistically , air temperature , soil Eh and soil moisture ( water-filled pore space , WFPS ) at 0-10cm depth significantly affected the fluctuations of the seasonal CH4 flux , but no significant correlationship has been found between N2O flux and related environmental factors .
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