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Score: 3.00
Title: Comparative analysis of QTLs affecting plant height and maturity across the Poaceae , in reference to an interspecific sorghum population .
Author: Lin YR Schertz KF Paterson AH .
Journal: Genetics Citation: V : 141 ( 1 ) P : 391-411 Year: 1995 Type: ARTICLE
Literature: oryza Field: abstract Doc ID: pub8536986 Accession (PMID): 8536986
Abstract: Correspondence among QTLs affecting height and/or flowering was investigated across the five races of sorghum , an interspecific sorghum F2 population , and 32 previously published sorghum , maize , rice , wheat , and barley populations revealing 185 QTLs or discrete mutants . Among nine QTLs mapped in the interspecific sorghum population ( six affecting height and three affecting flowering ) , at least seven ( 78% ) are associated with "conversion , " backcross-introgression of alleles imparting reduced height or earlier flowering from cultivated sorghums into one or more exotic Sorghum bicolor races . One chromosomal region was "converted" in all S bicolar races--in the interspecific F2 , this region explained 54 . 8% of height variation ( putatively the Dw2 gene ) and 85 . 7% of flowering time variation ( putatively Ma1 ) . Comparative data suggest that Ma1 and Dw2 orthologs influence height and flowering of other Poaceae taxa and support classical dogma that the sorghum phenotypes attributed to Ma1 and Dw2 ( respectively ) are due to different genetic loci . Other sorghum QTLs also showed correspondence with those in other Poaceae , more frequently than would be expected by chance . Possible homoeologous QTLs were found within both the maize and sorghum genomes . Comparative QTL mapping provides a means to unify , and thereby simplify , molecular analysis of complex phenotypes .
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[ Sen. 4, subscore: 2.00 ]: Comparative data suggest that Ma1 and Dw2 orthologs influence height and flowering of other Poaceae taxa and support classical dogma that the sorghum phenotypes attributed to Ma1 and Dw2 ( respectively ) are due to different genetic loci .
[ Sen. 3, subscore: 1.00 ]: One chromosomal region was "converted" in all S bicolar races--in the interspecific F2 , this region explained 54 . 8% of height variation ( putatively the Dw2 gene ) and 85 . 7% of flowering time variation ( putatively Ma1 ) .
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