Screening winter wheat for resistance to cottony snow mold under controlled conditions

Gaudet, D. A.; Kozub, G. C.

doi:10.4141/cjps91-138

Cited by 35 publications

(54 citation statements)

References 11 publications

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“…1), and 13 winter wheat cultivars/lines and one fall rye cultivar were employed in the field study (Table 1). Relative snow mold ratings for lines were previously determined under controlled environment conditions (Gaudet and Kozub 1991;Gaudet, unpublished data) and are presented in Table 1. Snow mold resistance values represent average percent survival in the field over several winters and controlled environment studies inoculated with the cottony snow mold pathogen (LTB, syn.…”

Section: Genetic Materialsmentioning

confidence: 99%

“…Snow mold resistance values represent average percent survival in the field over several winters and controlled environment studies inoculated with the cottony snow mold pathogen (LTB, syn. Coprinus psychromorbidus) according to Gaudet and Kozub (1991) and Gaudet (unpublished data). The doubled haploid lines 268-4a-3 and 272-2a-2 were derived from the F 1 of a Norstar/PI 181268 cross, 3-8a-3 was derived from the F 1 of a CI 14106/ Norstar cross, and 63-4a-1 was derived from a Norstar/ CI 14106//Norstar cross.…”

Section: Genetic Materialsmentioning

confidence: 99%

“…Under controlled environment conditions, older hardened winter wheat plants express higher resistance to snow molds than do younger plants. Even susceptible cultivars can develop substantial resistance to snow mold if growing conditions permit the development of many tillers and large crowns (Gaudet and Chen 1987;Gaudet and Kozub 1991;Nakajima and Abe 1996). In the Pacific Northwestern United States, the maximum expression of snow mold resistance is observed with early seeding, which permits the development of large plants with numerous tillers (Bruehl 1967(Bruehl , 1982.…”

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Effect of plant age on water content in crowns of fall rye and winter wheat cultivars differing in snow mold resistance

Gaudet¹,

Laroche²,

Puchalski³

2001

Can. J. Plant Sci.

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. 2001. Effect of plant age on water content in crowns of fall rye and winter wheat cultivars differing in snow mold resistance. Can. J. Plant Sci. 81: 541-550. Resistance to snow molds in winter wheat increases with plant age, and older plants express higher levels of resistance than young plants. Experiments were conducted to study the effect of plant age on percent crown water content (%CWC) and dry weights in fall rye and winter wheat cultivars grown under controlled environments and in the field at Lethbridge, AB. Under controlled environments, the oldest (6 wk of pre-hardening growth at 20°C) treatments accumulated the greatest dry weights following exposure of plants to 1 to 6 wk hardening conditions at 2°C, compared with younger (1 to 4 wk pre-hardening growth) treatments. Exposure of plants to hardening temperatures had the greatest effect on %CWC values, which decreased, gradually, from 82-89% (4.95-8.67 g H 2 O g -1 DW) in unhardened treatments to 67-72% (2.05-2.65 g H 2 O g -1 DW) in plants receiving the 6 wk pre-hardening and 6 wk hardening growth. However, the oldest treatments (4 to 6 wk pre-hardening growth) always exhibited the lowest %CWC values among all hardening treatments. The %CWC in the oldest (6 wk) unhardened plants was also lower ( × = 80.8% or 4.24 g H 2 O g -1 DW) than in the youngest (1 wk) unhardened plants ( × = 91.2% or 11.31 g H 2 O g -1 DW ), demonstrating that water loss occurs in older plants in the absence of low hardening temperatures. In a field study at Lethbridge during the autumn, winter, and early spring of 1997-1998 and 1998-1999, different seeding dates were employed to obtain plants differing in age and developmental state. The %CWC in earlyseeded treatments was lower during the autumn, and remained lower in early spring, compared with later seeded cultivars. The %CWC in crowns was negatively associated with the snow mold resistance rating of a fall rye and five winter wheat cultivars under controlled environment conditions, and among a fall rye and 13 winter wheat cultivars in the field; the highest correlation values in the field were observed from mid-November to mid-March during 1997-1998 (r = -0.84), and 1998-1999 (r = -0.76). These results indicate that the type of snow mold resistance that increases with plant age is related to the accumulation of crown dry matter and the ability of wheat and rye plants to lose crown water in response to both extended growth at warm temperatures and hardening at low, above freezing temperatures. 541-550. Chez le blé d'hiver, la résistance à la moisissure des neiges s'accroît avec l'âge, si bien que les plants plus âgés y résistent mieux que les jeunes. Les auteurs ont étudié les effets de l'âge de la plante sur la concentration d'eau dans la couronne (% CEC) et sur le poids sec des cultivars de seigle d'automne et de blé d'hiver cultivés en milieu contrôlé et au champ à Lethbridge (Alberta). En milieu contrôlé, les traitements les plus longs (6 semaines de culture à 20°C) débouchent sur le poids sec le plus élevé après acc...

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Section: Genetic Materialsmentioning

confidence: 99%

Section: Genetic Materialsmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Effect of plant age on water content in crowns of fall rye and winter wheat cultivars differing in snow mold resistance

Gaudet¹,

Laroche²,

Puchalski³

2001

Can. J. Plant Sci.

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“…For controlled-environment inoculation studies, 20 mL of LTB inoculum was spread on the soil surface of 15-cm pots containing orchardgrass plants. Pots were then covered with moistened absorbent cotton to maintain high humidity and loosely enclosed in a 10-L polyethylene bag (Gaudet and Kozub 1991). Control plots or pots were inoculated with a sterile oat-rye mixture.…”

Section: Inoculum and Inoculationmentioning

confidence: 99%

“…Resistance to snow molds is also related to the developmental stage of the plant (i.e., plant age) during hardening in winter cereals and grasses. Under controlled-environment conditions, older hardened plants of winter wheat and grass species express higher resistance to snow molds (Årsvoll 1977;Bruehl 1982;Gaudet and Chen 1987;Gaudet and Kozub 1991;Nakajima and Abe 1996) than do younger plants. Even susceptible cultivars can develop substantial resistance to snow mold if growing conditions permit the development of many tillers and large crowns.…”

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Effect of plant age and cottony snow mold on winter survival of forage grasses

Hwang¹,

Gaudet²,

Turnbull³

et al. 2002

Can. J. Plant Sci.

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. Effect of plant age and cottony snow mold on winter survival of forage grasses. Can. J. Plant Sci. 82: 701-708. The low temperature basidiomycete (LTB, syn. Copribus psychromorbidus Traquair), the causal agent of cottony snow mold, is a major constraint to forage grass survival and productivity in the parkland region of the Canadian prairies under prolonged snow cover (e.g., 160 d). Studies were conducted to establish the level of the snow mold resistance in seven grass species commonly grown in western Canada and to identify the seeding dates that permit grass plants to develop maximum levels of resistance to snow mold. Following attack by the LTB fungus, considerable variation in winter survival and forage yield was observed among the grass species. Smooth brome and meadow brome were most resistant, followed by timothy and creeping red fescue. Tall fescue and orchardgrass were the most susceptible. Controlled-environment and field studies demonstrated that orchardgrass seeded in late spring resulted in greater winter survival and dry matter yield than when seeded in July or August, both in snow mold inoculated and noninoculated treatments. Additional mortality and dry matter yield loss were linked to snow mold injury. These results demonstrated that snow mold injury could reduce winter survival and yield in first-year forage grasses, especially in orchardgrass, and early seeding could reduce the impact of winter stresses.Key words: Grass, orchardgrass, timothy, smooth bromegrass, meadow bromegrass, creeping red fescue Hwang, S. F., Gaudet, D. A., Turnbull, G. D., Chang, K. F., Howard, R. J. et Najda, H. 2002. Incidence de l'âge de la plante et de la moisissure cotonneuse des neiges sur la survie des graminées fourragères à l'hiver. Can. J. Plant Sci. 82: 701-708. Le basidiomycète psychrophile (BP, syn. Coprinus psychromorbidus Traquair), responsable de la moisissure cotonneuse des neiges, nuit considérablement à la survie des graminées fourragères en hiver et à leur productivité dans la région des forêts-parcs des Prairies canadiennes quand la couche de neige perdure (à savoir, 160 jours). Les auteurs ont essayé d'établir la résistance de sept graminées couramment cultivées dans l'ouest du Canada à la moisissure des neiges et les dates de semis qui leur donneraient les meilleures chances de résister à ce parasite. Une fois attaquées par le BP, la survie à l'hiver et le rendement fourrager des graminées varient considérablement. Le brome inerme et le brome des prés sont les plus résistants, suivis de la phléole et de la fétuque rouge traçante. La fétuque élevée et le dactyle pelotonné s'avèrent les plus sensibles à la maladie. Les études en milieu contrôlé et les essais au champ indiquent que lorsqu'on le sème à la fin du printemps, le dactyle résiste mieux à l'hiver et donne un meilleur rendement en matière sèche que si on le sème en juillet ou en août, avec ou sans inoculation de BP. Le taux de mortalité plus élevé et les plus fortes baisses de rendement en matière sèche sont associés aux attaques de la moi...

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Registration of the PI 173438/WA 8137 wheat doubled haploid mapping population

Phipps

Balow

Burke

et al. 2022

J of Plant Registrations

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A doubled haploid mapping population was developed from a cross between the hard red winter wheat (Triticum aestivum L. subsp. aestivum) landrace PI 173438 and WA 8137, a soft white winter wheat breeding line developed by the Washington State University winter wheat breeding program in Pullman, WA. The PI 173438/WA 8137 (Reg. no. MP‐16, NSL 543858 MAP) population consists of 437 individuals, with 358 of these individuals used to identify quantitative trait loci associated with snow mold (Typhula spp.) tolerance in PI 173438. Genotypic information was gathered on these individuals using genotype‐by‐sequencing and processed using a pipeline developed by the USDA Eastern Regional Small Grains Genotyping Laboratory. Twenty‐three linkage groups covering the whole genome with groups for the long and short arms of chromosomes 3D and 7D were constructed using 4,029 single nucleotide polymorphisms from the sequenced individuals. Quantitative trait loci associated with snow mold tolerance and snow mold recovery attributed to PI 173438 were successfully identified in this population. PI 173438 has also been used to identify other traits associated with snow mold tolerance, such as freezing tolerance and carbohydrate reserves, and has been important in research investigating dwarf and common bunt. This population may continue to expand current knowledge in these areas, and, given the landrace status of PI 173438, the population may be useful in identifying other novel traits of interest.

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Screening winter wheat for resistance to cottony snow mold under controlled conditions

Abstract: For personal use only.

Cited by 35 publications

References 11 publications

Effect of plant age on water content in crowns of fall rye and winter wheat cultivars differing in snow mold resistance

Effect of plant age on water content in crowns of fall rye and winter wheat cultivars differing in snow mold resistance

Effect of plant age and cottony snow mold on winter survival of forage grasses

Registration of the PI 173438/WA 8137 wheat doubled haploid mapping population

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