Genetic mapping and pyramiding of two new pear scab resistance QTLs
Genetic mapping and pyramiding of two new pear scab resistance QTLs
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DOI：
10.1007/s11032-015-0391-5
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发表时间：
2015-10
影响因子：
3.1
通讯作者：
L. Perchepied;D. Leforestier;E. Ravon;P. Guérif;C. Denancé;M. Tellier;S. Terakami;T. Yamamoto;M. Chevalier;Y. Lespinasse;C. Durel
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文献类型：
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作者：
L. Perchepied;D. Leforestier;E. Ravon;P. Guérif;C. Denancé;M. Tellier;S. Terakami;T. Yamamoto;M. Chevalier;Y. Lespinasse;C. Durel
黑星病是梨树主要真菌病害之一，造成的经济损失最大。识别和聚合赤霉病抗性因子应该有助于培育新的抗性梨品种。我们已经鉴定并绘制了两个新的梨抗真菌病原体 Venturia pirina 的抗性位点。第一个基因座既作为主基因又作为 QTL 定位，位于杂交 P3480 的连锁群 (LG) 01，源自欧洲梨品种“Wilder”。它与亚洲梨品种“Kinchaku”中发现的针对 Venturia nashicola 的 Vnk 抗性基因共定位。第二个基因座被定位为 QTL，位于种间品种“Euras”的 LG04 上。在小型“Euras”×P3480 后代中，使用 SSR 标记选择了在两个基因座上均携带抗性等位基因的 7 株幼苗。
Scab is one of the major fungal diseases infecting pear trees, causing the greatest economic losses. Identifying and pyramiding scab resistance factors should help in breeding new resistant pear cultivars. We have identified and mapped two new pear resistance loci against the fungal pathogenVenturia pirina. The first locus, mapped both as a major gene and as a QTL, is located on linkage group (LG) 01 of the hybrid P3480, deriving from the European pear cultivar ‘Wilder.’ It colocalizes with theVnkresistance gene found in the Asian pear cultivar ‘Kinchaku’ againstVenturia nashicola. A second locus, mapped as a QTL, is located on LG04 of the interspecific cultivar ‘Euras.’ In a small ‘Euras’ × P3480 progeny, seven seedlings carrying the resistant alleles at both loci have been selected using SSR markers.