INHERITANCE OF BLAST RESISTANCE IN NEAR-ISOGENIC LINES OF RICE
INHERITANCE OF BLAST RESISTANCE IN NEAR-ISOGENIC LINES OF RICE
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DOI：
10.1094/phyto-82-746
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发表时间：
1992-07-01
期刊：
影响因子：
3.2
通讯作者：
BONMAN, JM
中科院分区：
文献类型：
--
作者：
MACKILL, DJ;BONMAN, JM
对稻瘟病的抗性是大多数水稻育种计划的重要目标。 由于病原菌的变异性和缺乏具有单一抗性基因的水稻基因型，抗性遗传研究变得复杂。 利用4个供体品种与轮回亲本CO 39回交，获得了抗稻瘟病单基因近等基因系。 在回交过程中，用5个病原分离物对群体进行筛选。 22个近等基因系被分为六组，他们的反应，以不同的一组爆炸分离。 近等基因系C101 LAC、C101 A51和C104 PKT的稻瘟病抗性分别由独立的显性基因控制，命名为Pi-1（t）、Pi-2（t）和Pi-3（t）。 C101 PKT和C105 TTP-4的稻瘟病抗性分别由位于Pi-4a（t）和Pi-4 b（t）的显性等位基因赋予。
Resistance to blast disease is an important objective of most rice breeding programs. Genetic studies of resistance have been complicated by variability of the pathogen and lack of rice genotypes with single resistance genes. Near-isogenic lines (NILs) with single blast resistance genes were developed by backcrossing four donor cultivars to the recurrent parent CO39. Five pathogen isolates were used to screen the populations during backcrossing. The 22 NILs were classified into six groups by their reaction to a diverse set of blast isolates. Blast resistance was conferred by independent dominant genes in the NILs C101LAC, C101A51, and C104PKT, designated Pi-1(t), Pi-2(t), and Pi-3(t), respectively. Blast resistance in C101PKT and C105TTP-4 was conferred by dominant alleles at an additional locus, designated Pi-4a(t) and Pi-4b(t), respectively.