Inheritance of Yellow Rust Resistance in an Elite Wheat Germplasm Xingzi 9104
Inheritance of Yellow Rust Resistance in an Elite Wheat Germplasm Xingzi 9104
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发表时间：
2006
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通讯作者：
L. Hong;Liu Tai
中科院分区：
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作者：
L. Hong;Liu Tai
小麦条锈菌（Pucciniastriiformis）引起的小麦条锈病（Yellow RustWest.is）在我国大部分小麦产区具有重要的经济意义。自1950年以来，小麦条锈病每年都有大流行，在全国或部分地区均有发生。从小麦遗传材料中寻找抗病基因，提高小麦的遗传多样性，小麦优良种质兴资9104对条锈病的抗性遗传研究结果表明，星自9104苗期至少存在一对控制条锈菌CY17抗性的显性独立基因，条锈菌对条锈菌CY32的抗性在成株期由一对显性基因控制，苗期抗条锈病基因YrSk该品系可用于我国小麦品种改良，有效防治小麦条锈病。
Yellow rust of wheat caused by Puccinia striiformis West.is economically important in most wheat growing areas in China.Epidemics of wheat yellow rust have occurred annually since 1950,all over the country or in some areas.Breeding and using of wheat resistance cultivars are the cheapest,most reliable and environmentally safest way to control the disease.A great deal of effort has been spent on enhancing the genetic diversity by seeking resistance genes from wheat genetic materials and subsequently transferring them into cultivated wheat.Inheritance of resistance of Xingzi 9104,an elite wheat germplasm,against wheat yellow rust(Puccinia striiformis West.) was analyzed by combining the hybridization with postulation of genes for yellow rust resistance of wheat.The results indicated that there were at least one pair of dominant independent genes to Puccinia striiformis at the seedling stage of Xingzi 9104 which control the resistance to CY17 of P.striiformis,one pair of dominant genes to Puccinia striiformis at the adult plant stage which control the resistance to CY32 of P.striiformis.The gene YrSk for yellow rust resistance at the seedling stage was also postulated in Xingzi 9104.The wheat line can be used in wheat improvement program for controlling wheat yellow rust effectively in China.