RVA辅助稻米食用品质改良研究

Inricequalityimprovement programs,starchpastingviscosityservesasanimportantindexinesti matingtheeatingqualityofrice .Ithasbeenconsid eredtobeaveryimportantparameterinqualityeval uationofstarch basedfood .IntheUnitedStates ,itisestablishedthattheintermediateamylosecontentisagoodindicatorofanintermediateamylographvis cosityprofilewhenevaluatingcrossesofSouthernU nitedStateslonggrainriceswithlowamylographviscosityprofilehighamylosecontentlonggrainricecultivars.InAustralian ,ricebreedershaveused…

A Study on the Improvement of Eating Quality of Early Indica Rice with the Assistance of RVA

The high percent of starch in the milled rice have great effects on the eating quality of the cooked rice. Breeding rice with improved eating quality has long been the major objective in rice breeding programs. Starch pasting viscosity tested by Rapid Visco Analyser (RVA) serves as an important index in estimating the eating quality of rice. However, its utility in a rice breeding program has received few attention and has not been fully demonstrated. In the present study, the F2:3 and F3:4 seeds deriving from the Zhefu 49×Zhefu 728 were consecutively measured the RVA profiles of brown rice flour based on single-plant. The clustering analysis with different kinds of parameters of RVA suggested that once a line with desired RVA profile was selected in F2:3, the probability to select this kind of RVA profile from its F3:4 progenies was as high as 51.8%. The present result was in agreement with genetic result that RVA profile parameters had a high heritability. Therefore, breeding better eating quality of rice can be accelerated with the assistance of RVA instrument.