RFLP analysis of introgressed chromosomal segments in three near-isogenic lines of rice for bacterial blight resistance genes, Xa-1, Xa-3 and Xa-4.

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  • 白葉枯病抵抗性遺伝子Xa-1,Xa-3,Xa-4に関するイネ準同質遺伝子系統の導入染色体断片長のRELP分析〔英文〕
  • シロハガレビョウ テイコウセイ イデンシ Xa-1 Xa-3 Xa-4 ニ カ

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Abstract

Introgressed chromosome segments in three near-isogenic lines (NILs) of rice for bacterial blight resistance genes Xa-1, Xa-3 and Xa-4 with the genetic backgrounds of an IR24 variety were measured by using restriction fragment length polymorphic (RFLP) markers and linkage map. The size of the introgressed segment flanking Xa-1 of a NIL was estimated to be 3.3-11.7 cM of map units. Both NILs for Xa-3 and Xa-4 contained the donor segments at an identical end of linkage group corresponding to chromosome 11. We demonstrated in this study that these NILs were good materials to identify DNA markers tightly linked to these resistance genes and the RFLP markers tagging the resistance genes were useful in genetics and breeding on the disease resistance.<br>

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