Breeding of near-isogenic lines for resistance to bacterial blight, xanthomonas oryzae pv. oryzae, in rice

Twelve near-isogenic lines were selected from BC₃F₄ of three rice crosses between three different resistance-donor parents, Kogyoku(Xa-1), Rantai Emas(Xa-1, Xa-2) and Wase Aikoku 3 (Xa-3) and recurrent parent, Milyang 23, which is susceptible to bacterial blight. Several characters, such as diseases resistance, physiological traits, agronomic and grain characters were compared between Milyang 23 and selected breeding lines. Finally, HR11395-19-1(Xa-1), HR11396-3-3(Xa-1, Xa-2) and HR11397-28-1(Xa-3) lines were determined as near-isogenic lines(NILs) of Milyang 23 genetic background with different resistant gene to bacterial blight.