Heterosis and Combining Ability of Amylose Content and Amylographic Breakdown Viscosity in Milled Rice (Oryza sativa L.)

Abstract

Heterosis and combining ability for two quality paramenters, amylose content and amylographic breakdown viscosity, of rice grain were studied in 30 cross combinations involving six entries of rice (Oryza sativa L.). Data indicated that heteroses over their midparent (MP) or higher-parent (HP) were observed. 以六親本所雜交的30個水稻組合，探討米粒直鏈澱粉含量與澱粉崩解黏度的雜種優勢與組合力。數據顯示，與中間親本及高親本等比較的兩類雜種優勢均存在，兩個被評估米質性狀的兩類雜種優勢的程度因組合而有不同。