Molecular mapping of adult plant stripe rust resistance in wheat and identification of pyramided QTL genotypes

作者：Bariana H S^*; Bansal U K; Schmidt A; Lehmensiek A; Kaur J; Miah H; Howes N; McIntyre C L

来源：Euphytica, 2010, 176(2): 251-260.

DOI：10.1007/s10681-010-0240-x

• Wheat
• Stripe rust
• Puccinia striiformis f. sp tritici
• Adult plant resistance
• Durable resistance
• Molecular mapping

The Puccinia striiformis f. sp. tritici (Pst) pathotype, 134 E16A+, detected in 2002 in Australia, produced relatively lower and higher adult plant stripe rust responses, respectively, on cultivars Kukri and Janz in comparison to the pre-2002 Pst pathotype 110 E143A+. Molecular mapping of adult plant stripe rust response variation among 180 Kukri/Janz-derived doubled haploid lines over 4 years, two each with Pst pathotypes 110 E143A+ and 134 E16A+, was performed. QYr.sun-7B and QYr.sun-7D were consistently contributed by Kukri and Janz, respectively. QYr.sun-7D corresponded to the genomic location of Yr18 and QYr.sun-7B remains to be formally named. QYr.sun-1B, QYr.sun-5B, and QYr.sun-6B were detected during more than one season irrespective of the Pst pathotypes used, whereas QYr.sun-3B was identified only during the 2003 crop season. QYr.sun-1A contributed by Janz, and QYr.sun-2A from Kukri, were detected only against Pst pathotypes 110 E143A+ and 134 E16A+, respectively. The DH lines showing better resistance than the either parent carried combinations of 4 to 6 QTL. These lines are currently being used as stripe rust resistance donors in wheat breeding programs.

• 出版日期2010-11
• 单位CSIRO