| 000 | 02692nam a22003137a 4500 | ||
|---|---|---|---|
| 001 | G95058 | ||
| 003 | MX-TxCIM | ||
| 005 | 20240919020958.0 | ||
| 008 | 121211s ||||f| 0 p|p||0|| | | ||
| 040 | _aMX-TxCIM | ||
| 090 | _aCIS-6339 | ||
| 100 | 1 |
_aNjau, P.N. _uBGRI Technical Workshop, Oral Presentations Poster Abstracts Participants and Program; Minnesota (USA); 13-16 Jun 2011 _92089 |
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| 245 | 0 | 0 | _aIdentification of QTLs associated with adult plant resistance to stem rust race Ug99 in the 'Avocet' x 'Pavon76' recombinant inbred line population |
| 260 | _c2011 | ||
| 300 | _ap. 189 | ||
| 500 | _aAbstract only | ||
| 520 | _aStem rust, caused by Puccinia graminis f. sp. Tritici (Pgt), has historically caused severe losses to wheat production worldwide, but was effectively controlled by resistance for almost 30 years. However, stem rust re-emerged in 1998 in eastern Africa in the form of race Ug99. Furthermore, it has u ndergone changes to produce separate variants with added virulence to resistance genes Sr24 and Sr36. The lineage is once again threatening the global wheat crop. The objective of our study was to identify genomic regions contributing to APR to stem rust in ?Pavon 76?. A recombinant inbred line (RIL) population of 298 lines was previously developed at CIMMYT from a cross between ?Avocet S? and ?Pavon 76. The RILs segregated for APR to Ug99 when evaluated in Kenya for three years. Single year and combined year analyses by inclusive composite interval mapping using 450 DArT markers identified six quantitative trait loci (QTLs) contributing to resistance . avon 76? contributed three QTLs, Sr2-linked QSr.cim-3B-1, Lr46/Yr29/Pm39- linked QSr.cim-1B and QSr.cim-3D (possibly an ortholog of Sr2), which explained 32%, 24% and 20% of the phenotypic variance, respectively. The remaining three QTLs, QSr.cim-3B-2, QSr.cim-4B and QSr.cim-5A, were contributed by ?Avocet? and explained 24%, 8% and 6% of the phenotypic variance, respectively. Our results indicate that it is possible to accumulate several minor genes (each with a small-to-intermediate effect) to produce a variety that exhibits negligible disease levels even under high stem rust pressure. | ||
| 536 | _aGlobal Wheat Program | ||
| 546 | _aEnglish | ||
| 593 | _aLucia Segura | ||
| 594 | _aINT2843|INT0610 | ||
| 700 | 1 |
_aKeller, B., _ecoaut. _91680 |
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| 700 | 1 | _aMcIntosh, R. | |
| 700 | 1 |
_aHuerta-Espino, J. _gGlobal Wheat Program _8CHUE01 _9397 |
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| 700 | 1 |
_aSingh, R.P. _gGlobal Wheat Program _8INT0610 _9825 |
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| 700 | 1 |
_9867 _aBhavani, S. _gGlobal Wheat Program _8INT2843 |
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| 856 | 4 |
_yAccess only for CIMMYT Staff _uhttp://libcatalog.cimmyt.org/download/cis/G95058.pdf |
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| 942 |
_cPRO _2ddc |
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| 999 |
_c8108 _d8108 |
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