Resistance to soil-borne diseases of wheat: Contributions from the wheatgrasses <i>Thinopyrum intermedium</i> and <i>Th. ponticum</i>

Li, Hongjie; Conner, Robert L.; Murray, Timothy

doi:10.4141/cjps07002

Cited by 22 publications

(21 citation statements)

References 82 publications

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“…Breeding lines and historic varieties were chosen for inclusion in the present study based on performance data from the 2005 harvest of organic, conventional, and historic wheat trials of WSU WW. Six lines were chosen from each category based on high relative grain yields and resistance to predominant diseases, including stripe rust (Puccinia striiformis; Chen 2005), Cephalosporium stripe (Cephalosporium gramineum; Cai et al 1998;Cox et al 2002;Li et al 2008), and eyespot (also called strawbreaker footrot; Tapesia yallundae; Cadle et al 1997;Cox et al 2002;Li et al 2005Li et al , 2008. Historic varieties were chosen from screening trials for overall performance, disease resistances, and weed tolerance, conducted by WSU WW of varieties grown in the Pacific Northwest prior to 1940, before the use of synthetic fertilizers in breeding programs and on farms became common in the 1950s.…”

Section: Germplasmmentioning

confidence: 99%

Evaluation of winter wheat breeding lines for traits related to nitrogen use under organic management

et al. 2011

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There is growing interest in breeding crop cultivars specifically for organic agriculture, based on recognized differences in environmental conditions and management in organic systems compared to conventional systems, and especially due to environmental heterogeneity among and within individual organic systems. There is a need to develop effective strategies for improving crop performance in organic systems through plant breeding. This study evaluated 12 diverse winter wheat breeding lines chosen from conventional and organic breeding nurseries, six historic varieties, and an experimental perennial wheat population under organic management in the Inland Pacific Northwest region of the USA. A randomized complete block design with three replications in two locations over 2 years was used. Based on an analysis of variance, significant genetic differences and crossover interactions across years were found for grain yield, grain percent nitrogen, grain total nitrogen, and aboveground biomass. There were no main effects of locations or location-by-genotype effects for these traits. Based on comparisons among these breeding lines, it appears that there is a possibility of selecting for performance across a limited ecological zone as top-yielding lines were the same in both locations. However, individual entries may have 66 Org. Agr. (2011) 1:65-80 variable performance across years within a single location so selection for stability of performance over years is also necessary. Using an analysis of direct measures of grain yield and grain %N in each location-year combination and overall, we identified breeding lines with relatively high yield, acceptable grain protein, and stable performance over all four location-year combinations. The use of indirect measures or index selection to simultaneously select for grain yield and protein did not appear to be more effective than direct selection based on yield and grain %N measured under organic management.

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Section: Germplasmmentioning

confidence: 99%

Evaluation of winter wheat breeding lines for traits related to nitrogen use under organic management

et al. 2011

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“…In the context of wheat genotype evaluation, assays based on this technique were developed by Meyer et al. (2006, 2008) and by Gedye and Murray [unpublished work cited by Li et al. (2008)].…”

Section: Methods For the Assessment Of Eyespot Resistancementioning

confidence: 99%

“…2005). These resistance sources require further chromosomal engineering to remove deleterious factors introduced with the alien chromatin (Li et al. 2008).…”

Section: Sources Of Eyespot Resistance and Resistance Genes Found In mentioning

confidence: 99%

Advances and Prospects in Wheat Eyespot Research: Contributions from Genetics and Molecular Tools

Wei

Muranty

Zhang

2011

Journal of Phytopathology

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Eyespot disease caused by the soil-borne facultative fungi Oculimacula yallundae and O. acuformis is the major component of the stem-base disease complex of wheat in temperate regions of the world with a cool and wet climate. In this review, we focus on results of genetic studies concerning both partners of the host-pathogen interaction. This comprises analyses of genetic diversity of the pathogen and identification of particular genes within it, evaluation and screening methods for host resistance, resistance sources and genetics of these resistances, breeding of resistant cultivars in wheat, and application of genetic markers in tagging and tracking of eyespot resistance genes. We also attempt to foresee some of the key issues and developments that may occur in future. The identification of markers tightly linked to eyespot resistance genes is the important research focus opening the door to marker-assisted selection of resistant varieties.

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“…The wild relatives, Th. intermedium (2 n = 6 x = 42, JJ s S), has a wealth of genetic variation for the improvement of resistance to fungal and viral diseases in wheat (Li et al 2008; Li and Wang 2009). To date, several wheat– Th.…”

mentioning

confidence: 99%

Characterization of a partial wheat-Thinopyrum intermedium amphiploid and its reaction to fungal diseases of wheat

et al. 2010

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Partial amphiploids between wheat (Triticum aestivum L.) and Thinopyrum species play an important role in the transfer and use of traits from alien species. A wheat-Thinopyrum intermedium partial amphiploid, TAI8335, and its alien parent were characterized by a combination of genomic in situ hybridization (GISH) and cytological observations. Evidence from GISH indicated that the donor parent Th. intermedium possessed seven pairs of S, seven J(s) and 21 J chromosomes. Mitotic observation showed that the majority of TAI8335 plants had 56 chromosomes, but a few had 54 to 55, in some cases with two to three additional telochromosomes. The chromosomes in most pollen mother cells of plants with 2n = 56 formed 28 bivalents, averaging 27.12 in 223 cells, suggesting a basic cytological stability. Sequential GISH patterns using genomic Pseudoroegneria spicata and genomic Th. intermedium DNA as probes revealed that TAI8335 had fourteen chromosomes derived from Th. intermedium and its alien genome consisted of one pair of S-, three pairs of J(s) - and one pair of J-genome chromosomes as well as two translocated chromosome pairs, one being a Robertsonian translocation and another an intercalary translocation, both of which involved J and S genome. Two of the telochromosomes in the aneuploid plants originated from the J genome and one from wheat. Disease screening demonstrated this line was highly resistant to leaf rust, stem rust, stripe rust and powdery mildew. This study showed that the partial amphiploid TAI8335 appears to serve as a novel source for the transfer of resistance genes for multiple fungal pathogens to wheat.

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Resistance to soil-borne diseases of wheat: Contributions from the wheatgrasses Thinopyrum intermedium and Th. ponticum

Cited by 22 publications

References 82 publications

Evaluation of winter wheat breeding lines for traits related to nitrogen use under organic management

Evaluation of winter wheat breeding lines for traits related to nitrogen use under organic management

Advances and Prospects in Wheat Eyespot Research: Contributions from Genetics and Molecular Tools

Characterization of a partial wheat-Thinopyrum intermedium amphiploid and its reaction to fungal diseases of wheat

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