Development of Japonica Rice Lines with Blast Resistance Genes by Molecular Marker -Assisted Selection
Yang Yongyi
Zhang Hua
Xuan Ning
Chen Gao
Liu Xu
Yao Fangyin
Abstract：Using Hua 130B as donor of rice blast resistance genes and Shengdao 15 as recipient,ten lines including four lines with Pi1 gene,three lines with Pi2 gene and three double gene -pyramided lines were developed by back -cross breeding with molecular marker -assisted selection,and these lines showed desirable agronomic traits in the field.The natural evaluation results of rice blast resistance in field showed that the disease resistance grade of single gene lines and double gene -pyramided lines were 3 and 1 respec-tively,showing high resistance.The resistance grade of Shengdao 15 was 7,so it was highly susceptible.This research indicated that breeding of Pi1 and Pi2 using molecular marker -assisted selection could significantly improve the resistance to rice blast,and it also showed that the resistance of double gene -pyramided lines was significantly better than that of single gene lines.
Keywords：RiceRice blastMolecular marker -assisted selectionResistance identification
Publication Date：2016-10-31
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 18-20,25 )