QUANTITATIVELY-INHERITED RESISTANCE TO GLOBODERA-PALLIDA IS DOMINATED BY ONE MAJOR LOCUS IN SOLANUM SPEGAZZINII
QUANTITATIVELY-INHERITED RESISTANCE TO GLOBODERA-PALLIDA IS DOMINATED BY ONE MAJOR LOCUS IN SOLANUM SPEGAZZINII
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DOI：
10.1007/bf01253983
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发表时间：
1994-08-01
影响因子：
5.4
通讯作者：
STIEKEMA, WJ
中科院分区：
文献类型：
--
作者：
KREIKE, CM;DEKONING, JRA;STIEKEMA, WJ
马铃薯近缘野生种茄（Solanum spegazzinii）对苍白球皮线虫（Globodera pallida）Pa2和Pa3致病型具有较高的抗性。马铃薯tuberosum）。在这里，我们报告的定位涉及数量遗传线虫抗性与使用RFLP。一个主效基因Gpa定位在5号染色体上，两个次效基因定位在4号和7号染色体上。spegazzinii。此外，确定了感病亲本对线虫抗性的贡献。在分离群体中，Gpa基因座是导致高抗性水平的唯一原因，而与该抗性基因座紧密连锁的RFLP标记则表现出扭曲的分离，具有抗性连锁等位基因的植株很少。我们的研究结果表明，一个数量性状的遗传组成的预测，仅仅基于表型观察可能会导致错误的结论。
A high level of resistance to Globodera pallida pathotypes Pa2 and Pa3 exists in Solanum spegazzinii, a wild relative of potato (S. tuberosum ssp. tuberosum). Here we report the mapping of loci involved in quantitatively-inherited nematode resistance with the use of RFLPs. One major locus, Gpa, was mapped on chromosome 5 and two minor loci on chromosomes 4 and 7 of S. spegazzinii. Additionally, the contribution of the susceptible parent to nematode resistance was determined. The Gpa locus was solely responsible for the high resistance level found in the segregating population However thp RFLP marker closely linked to this resistance locus showed a distorted segregation, with a shortage of plants having the resistance linked allele. Our results indicate that a prediction of the genetic constitution of a quantitative trait based solely on phenotypic observations can lead to erroneous conclusions.