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利用携有白叶枯病抗性基因 Xa-5,Xa-7的抗源 DV_(85)衍生而来、但经济性状明显改善的 TD-1、TD-2为抗病供体亲本,与对白叶枯病感染的杂交稻优良恢复系明恢63杂交,在对目标性状——抗白叶枯病持性的强烈选择压下,与轮回亲本回交2次。然后自交,以便于其它有利基因重组,通过按产量与抗性进行鉴定与选择,目前所选育的抗18、抗21、抗25用白叶枯病强菌株浙173接种为高抗(HR),且抗病性状在与感病不育系配组的杂种 F_1中呈完全显性表达。这此抗系与珍汕97A 杂交的 F_1杂种农艺性状都近似于汕优63——珍汕97A/明恢63,在江、皖、豫、鄂等白叶枯病病区的杂交稻生产上有应用前景。再继续回交1～2次,可望获得进行白叶枯病抗性研究的近等基因系遗材料。
TD-1 and TD-2, derived from DV_ (85) with resistance to Xanthomonas oryzae Xe-5 and Xa-7, were significantly improved in economic traits, Bacterial blight-infected hybrid rice, Minghui 63, was backcrossed twice with backcrossed parents under the intense selection of the trait of target trait-resistant blight. And then self-pollinated to facilitate recombination of other favorable genes. The current selection of anti-18, anti-21, anti-25 bacterial blight isolates Zhejiang 173 was highly resistant (HR ), And the disease resistance trait was completely dominant expressed in F_1 hybrids with susceptible sterile lines. The F_1 hybrid agronomic characters of this line and Zhenshan 97A were similar to those of Shanyou 63-Zhenshan 97A / Minghui 63. In the hybrid rice production of bacterial blight in Jiangsu, Anhui, Henan and Hubei provinces, Have application prospects. And then continue to back-handed 1 or 2 times, is expected to obtain bacterial susceptibility to bacterial blight near-isogenic genetic material.