| 15 matches found in 4 documents. Search time: 0.466 seconds. |
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Score: 7.00 |
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| Title: Control of rice grain-filling and yield by a gene with a potential signature of domestication .
| | Author: Wang E Wang J Zhu X Hao W Wang L Li Q Zhang L He W Lu B Lin H Ma H Zhang G He Z | | Journal: Nat Genet Citation: V : 40 P : 1370-4 Year: 2008 Type: MEDLINE | | Literature: oryza Field: abstract Doc ID: pub18820698 Accession (PMID): 18820698 | | Abstract: Grain-filling , an important trait that contributes greatly to grain weight , is regulated by quantitative trait loci and is associated with crop domestication syndrome .
However , the genes and underlying molecular mechanisms controlling crop grain-filling remain elusive .
Here we report the isolation and functional analysis of the rice GIF1 ( GRAIN INCOMPLETE FILLING 1 ) gene that encodes a cell-wall invertase required for carbon partitioning during early grain-filling .
The cultivated GIF1 gene shows a restricted expression pattern during grain-filling compared to the wild rice allele , probably a result of accumulated mutations in the genes regulatory sequence through domestication .
Fine mapping with introgression lines revealed that the wild rice GIF1 is responsible for grain weight reduction .
Ectopic expression of the cultivated GIF1 gene with the 35S or rice Waxy promoter resulted in smaller grains , whereas overexpression of GIF1 driven by its native promoter increased grain production .
These findings , together with the domestication signature that we identified by comparing nucleotide diversity of the GIF1 loci between cultivated and wild rice , strongly suggest that GIF1 is a potential domestication gene and that such a domestication-selected gene can be used for further crop improvement .
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[ Sen. 6, subscore: 2.00 ]: Ectopic expression of the cultivated GIF1 gene with the 35S or rice Waxy promoter resulted in smaller grains , whereas overexpression of GIF1 driven by its native promoter increased grain production .
[ Sen. 7, subscore: 2.00 ]: These findings , together with the domestication signature that we identified by comparing nucleotide diversity of the GIF1 loci between cultivated and wild rice , strongly suggest that GIF1 is a potential domestication gene and that such a domestication-selected gene can be used for further crop improvement .
[ Sen. 3, subscore: 1.00 ]: Here we report the isolation and functional analysis of the rice GIF1 ( GRAIN INCOMPLETE FILLING 1 ) gene that encodes a cell-wall invertase required for carbon partitioning during early grain-filling .
[ Sen. 4, subscore: 1.00 ]: The cultivated GIF1 gene shows a restricted expression pattern during grain-filling compared to the wild rice allele , probably a result of accumulated mutations in the genes regulatory sequence through domestication .
[ Sen. 5, subscore: 1.00 ]: Fine mapping with introgression lines revealed that the wild rice GIF1 is responsible for grain weight reduction .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 7.00 |
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| Title: Duplication and independent selection of cell-wall invertase genes GIF1 and OsCIN1 during rice evolution and domestication .
| | Author: Wang E Xu X Zhang L Zhang H Lin L Wang Q Li Q Ge S Lu BR Wang W He Z | | Journal: BMC Evol Biol Citation: V : 10 P : 108 Year: 2010 Type: MEDLINE | | Literature: oryza Field: abstract Doc ID: pub20416079 Accession (PMID): 20416079 | | Abstract: BACKGROUND : Various evolutionary models have been proposed to interpret the fate of paralogous duplicates , which provides substrates on which evolution selection could act .
In particular , domestication , as a special selection , has played important role in crop cultivation with divergence of many genes controlling important agronomic traits .
Recent studies have indicated that a pair of duplicate genes was often sub-functionalized from their ancestral functions held by the parental genes .
We previously demonstrated that the rice cell-wall invertase ( CWI ) gene GIF1 that plays an important role in the grain-filling process was most likely subjected to domestication selection in the promoter region .
Here , we report that GIF1 and another CWI gene OsCIN1 constitute a pair of duplicate genes with differentiated expression and function through independent selection .
RESULTS : Through synteny analysis , we show that GIF1 and another cell-wall invertase gene OsCIN1 were paralogues derived from a segmental duplication originated during genome duplication of grasses .
Results based on analyses of population genetics and gene phylogenetic tree of 25 cultivars and 25 wild rice sequences demonstrated that OsCIN1 was also artificially selected during rice domestication with a fixed mutation in the coding region , in contrast to GIF1 that was selected in the promoter region .
GIF1 and OsCIN1 have evolved into different expression patterns and probable different kinetics parameters of enzymatic activity with the latter displaying less enzymatic activity .
Overexpression of GIF1 and OsCIN1 also resulted in different phenotypes , suggesting that OsCIN1 might regulate other unrecognized biological process .
CONCLUSION : How gene duplication and divergence contribute to genetic novelty and morphological adaptation has been an interesting issue to geneticists and biologists .
Our discovery that the duplicated pair of GIF1 and OsCIN1 has experienced sub-functionalization implies that selection could act independently on each duplicate towards different functional specificity , which provides a vivid example for evolution of genetic novelties in a model crop .
Our results also further support the established hypothesis that gene duplication with sub-functionalization could be one solution for genetic adaptive conflict .
| Matching Sentences:
[ Sen. 4, subscore: 1.00 ]: We previously demonstrated that the rice cell-wall invertase ( CWI ) gene GIF1 that plays an important role in the grain-filling process was most likely subjected to domestication selection in the promoter region .
[ Sen. 5, subscore: 1.00 ]: Here , we report that GIF1 and another CWI gene OsCIN1 constitute a pair of duplicate genes with differentiated expression and function through independent selection .
[ Sen. 6, subscore: 1.00 ]: RESULTS : Through synteny analysis , we show that GIF1 and another cell-wall invertase gene OsCIN1 were paralogues derived from a segmental duplication originated during genome duplication of grasses .
[ Sen. 7, subscore: 1.00 ]: Results based on analyses of population genetics and gene phylogenetic tree of 25 cultivars and 25 wild rice sequences demonstrated that OsCIN1 was also artificially selected during rice domestication with a fixed mutation in the coding region , in contrast to GIF1 that was selected in the promoter region .
[ Sen. 8, subscore: 1.00 ]: GIF1 and OsCIN1 have evolved into different expression patterns and probable different kinetics parameters of enzymatic activity with the latter displaying less enzymatic activity .
[ Sen. 9, subscore: 1.00 ]: Overexpression of GIF1 and OsCIN1 also resulted in different phenotypes , suggesting that OsCIN1 might regulate other unrecognized biological process .
[ Sen. 11, subscore: 1.00 ]: Our discovery that the duplicated pair of GIF1 and OsCIN1 has experienced sub-functionalization implies that selection could act independently on each duplicate towards different functional specificity , which provides a vivid example for evolution of genetic novelties in a model crop .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 2.00 |
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| Title: Seed size is determined by the combinations of the genes controlling different seed characteristics in rice .
| | Author: Yan S Zou G Li S Wang H Liu H Zhai G Guo P Song H Yan C Tao Y | | Journal: Theor Appl Genet Citation: V : 123 P : 1173-81 Year: 2011 Type: In-Process | | Literature: oryza Field: abstract Doc ID: pub21805338 Accession (PMID): 21805338 | | Abstract: Rice seed size is an important agronomic trait in determining the yield potential , and four seed size related genes ( GS3 , GW2 , qSW5/GW5 and GIF1 ) have been cloned in rice so far .
However , the relationship among these four genes is still unclear , which will impede the process of gene pyramiding breeding program to some extent .
To shade light on the relationship of above four genes , gene expression analysis was performed with GS3-RNAi , GW2-RNAi lines and CSSL of qSW5 at the transcriptional level .
The results clearly showed that qSW5 and GW2 positively regulate the expression of GS3 .
Meanwhile , qSW5 can be down-regulated by repression of GW2 transcription .
Additionally , GIF1 expression was found to be positively regulated by qSW5 but negatively by GW2 and GS3 .
Moreover , the allelic effects of qSW5 and GS3 were detailedly characterized based on a natural population consisting of 180 rice cultivars .
It was indicated that mutual interactions exist between the two genes , in which , qSW5 affecting seed length is masked by GS3 alleles , and GS3 affecting seed width is masked by qSW5 alleles .
These findings provide more insights into the molecular mechanisms underlying seed size development in rice and are likely to be useful for improving rice grain yield .
| Matching Sentences:
[ Sen. 1, subscore: 1.00 ]: Rice seed size is an important agronomic trait in determining the yield potential , and four seed size related genes ( GS3 , GW2 , qSW5/GW5 and GIF1 ) have been cloned in rice so far .
[ Sen. 6, subscore: 1.00 ]: Additionally , GIF1 expression was found to be positively regulated by qSW5 but negatively by GW2 and GS3 .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 1.00 |
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| Title: Duplication and independent selection of cell-wall invertase genes GIF1 and OsCIN1 during rice evolution and domestication .
| | Author: Wang E Xu X Zhang L Zhang H Lin L Wang Q Li Q Ge S Lu BR Wang W He Z | | Journal: BMC Evol Biol Citation: V : 10 P : 108 Year: 2010 Type: MEDLINE | | Literature: oryza Field: title Doc ID: pub20416079 Accession (PMID): 20416079 | | Abstract: BACKGROUND : Various evolutionary models have been proposed to interpret the fate of paralogous duplicates , which provides substrates on which evolution selection could act .
In particular , domestication , as a special selection , has played important role in crop cultivation with divergence of many genes controlling important agronomic traits .
Recent studies have indicated that a pair of duplicate genes was often sub-functionalized from their ancestral functions held by the parental genes .
We previously demonstrated that the rice cell-wall invertase ( CWI ) gene GIF1 that plays an important role in the grain-filling process was most likely subjected to domestication selection in the promoter region .
Here , we report that GIF1 and another CWI gene OsCIN1 constitute a pair of duplicate genes with differentiated expression and function through independent selection .
RESULTS : Through synteny analysis , we show that GIF1 and another cell-wall invertase gene OsCIN1 were paralogues derived from a segmental duplication originated during genome duplication of grasses .
Results based on analyses of population genetics and gene phylogenetic tree of 25 cultivars and 25 wild rice sequences demonstrated that OsCIN1 was also artificially selected during rice domestication with a fixed mutation in the coding region , in contrast to GIF1 that was selected in the promoter region .
GIF1 and OsCIN1 have evolved into different expression patterns and probable different kinetics parameters of enzymatic activity with the latter displaying less enzymatic activity .
Overexpression of GIF1 and OsCIN1 also resulted in different phenotypes , suggesting that OsCIN1 might regulate other unrecognized biological process .
CONCLUSION : How gene duplication and divergence contribute to genetic novelty and morphological adaptation has been an interesting issue to geneticists and biologists .
Our discovery that the duplicated pair of GIF1 and OsCIN1 has experienced sub-functionalization implies that selection could act independently on each duplicate towards different functional specificity , which provides a vivid example for evolution of genetic novelties in a model crop .
Our results also further support the established hypothesis that gene duplication with sub-functionalization could be one solution for genetic adaptive conflict .
| Matching Sentences:
[ Sen. 1, subscore: 1.00 ]: Duplication and independent selection of cell-wall invertase genes GIF1 and OsCIN1 during rice evolution and domestication .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
