An analysis on the content of γ-aminobutyric acid in the backcross hybrids of Indica and Japonica rice core collections in Yunnan

The generations F6,BC2F4,BC3F3,BC4F2 were prepared by the crosses,which were producted by Diantun 502 and 143 Indica rice core collections,the other samples were producted by Hexi 35 and 241 Japonica rice core collections.The study were proceed in Yunnan to determine and analyze GABA content of brown rice by spectrophotometry.The results show that,the content which Japonica rice backcross generations GABA is higher than Indica rice backcross generations,and the colored rice is higher than the colorless.GABA content are different in different backcross generations,for Indica,BC2F4(9.50)BC3F3(7.73)recurrent parent(3.72)BC4F2(3.3),for Japonica,recurrent parent(12.28)BC2F4(8.77)BC3F3(6.11)BC4F2(5.37).Overall,it is more accessible to get the GABA material from the early generations during in rice breeding.