简介：Aspontaneousmutation,tentativelynamedd63,wasderivedfromthetwin-seedlingprogeniesofricecrossedbydiploidSARIIIandMinghui63.Comparedwithwild-typeplants,thed63mutantshowedmultipleabnormalphenotypes,suchasdwarfism,moretillers,smallerflagleafandreducedseed-settingrateand1000-grainweight.Inthisstudy,twoF2populationsweredevelopedbycrossingbetweend63andNipponbare,d63and93-11.Geneticanalysisindicatedthatd63wascontrolledbyasinglerecessivegene,whichwaslocatedontheshortarmofchromosome8,withinthegeneticdistanceof0.40cMfromRM22195.Hence,D63mightbeanewgeneastherearenodwarfgenesreportedontheshortarmofchromosome8.
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