Half Diallel Analysis of Field Resistance of Winter Wheat to Typhula ishikariensis Biotype A in Artificially Infested Plots.

Iriki, Norio; Kuwabara, Tatsuo

doi:10.1270/jsbbs1951.43.495

Cited by 18 publications

(16 citation statements)

References 9 publications

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“…Ibis showed the highest values. This ranking was in agreement with previously published reports on varietal resistance to speckled snow mold (Iriki and Kuwabara 1992) and soil-borne pink snow mold (Amano 1987, Nakajima andAbe 1990).…”

Section: Disease Severities Among Four Winter Wheat Cultivars During supporting

confidence: 92%

“…The most practical method of controlling snow molds is growing resistant cultivars. Evaluation of genetic resources and screening breeding lines for snow mold resistance is routinely carried out in breeding programs, and testing methods in artificially infested plots or under controlled conditions have been developed (Amano 1987, Iriki and Kuwabara 1992, Kunii 1987, Nakajima and Abe 1990. Inoculum consisting of sclerotia or cultured mycelium are frequently applied to wheat plots to simulate natural infection.…”

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confidence: 99%

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Reaction of Winter Wheat Cultivars to Artificially Inoculated Seed-borne Pink Snow Mold.

2002

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Section: Disease Severities Among Four Winter Wheat Cultivars During supporting

confidence: 92%

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confidence: 99%

Reaction of Winter Wheat Cultivars to Artificially Inoculated Seed-borne Pink Snow Mold.

2002

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“…Total dry matter accumulation, as measured in this study, reflected both the simple sugar and fructan components; however, the majority of dry matter accumulation observed in the 6 wk pre-hardening growth and 6 wk hardened treatments under controlled environment conditions is attributable to fructan accumulation (Gaudet et al 2000). Snow mold resistance in wheat among crosses involving the snow mold resistant cultivar PI 173438 appears to be conditioned by the additive effect of two or three loci that are relatively highly heritable (Amano 1982;Iriki and Kuwabara 1993) suggesting that several genes may be operative among the different introduced wheat lines and their relatives.…”

Section: Discussionmentioning

confidence: 67%

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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“…Developmental resistance occurs in both resistant and susceptible cultivars and is affected by the duration of prehardening and hardening conditions (Bruehl 1982, Tronsmo 1982, Gaudet and Chen 1987, Nakajima and Abe 1996. Genotypic resistance has been observed in a small proportion of the world winter wheat collection and involves the additive action of 2±3 loci (Bruehl 1982, Gaudet and Kozub 1991, Iriki and Kuwabara 1993. Recent studies have implicated PR-proteins in expression of snow mould resistance (Ergon et al 1998, Gaudet et al 2000.…”

Section: Introductionmentioning

confidence: 99%

Cold induced expression of plant defensin and lipid transfer protein transcripts in winter wheat

Gaudet

Laroche

Frick

et al. 2003

Physiologia Plantarum

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In winter wheat, low temperature hardening induces a non‐specific resistance to snow moulds and other fungi. In a suppressive subtractive hybridization cDNA library between winter wheat unhardened and hardened at 2°C, 17% of 186 sequenced cDNA clones were homologous to the small plant defence related proteins, γ‐thionin, γ‐purothionin or non‐specific lipid transfer proteins (LTPs), based on their nucleotide sequences or deduced from amino acid sequences. Several partial‐ and full‐length cDNA clones homologous to two defensin proteins (γ‐thionin, subfamily B‐2, γ‐purothionin, subfamily I), and non‐specific LTPs were isolated. Regulation of defensin transcripts was clearly different from that of the LTPs under controlled environments in the field. The γ‐thionin and γ‐purothionin transcripts were not expressed in unhardened plants grown at 20°C, strongly upregulated after 1–3 days hardening at 2°C, remained upregulated for 28 days hardening, and disappeared following 1 day of exposure to dehardening conditions at 20°C. The LTPs transcripts were constitutively expressed in plants growing at 20°C, gradually increased to maximum levels following 14–28 days at hardening, and remained upregulated following 1 and 7 days dehardening. In the field, the γ‐thionin and γ‐purothionin transcripts rapidly increased to maximum levels by mid‐November and decreased gradually during the winter until mid‐March LTP transcripts were highly expressed in the early autumn, further increased during December–January, then decreased during late winter and early spring. Differences in the pattern and level of expression of these transcripts were evident among cultivars; γ‐thionin expression was associated with freezing resistance among the genotypes tested under both controlled environment and field conditions.

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Half Diallel Analysis of Field Resistance of Winter Wheat to Typhula ishikariensis Biotype A in Artificially Infested Plots.

Cited by 18 publications

References 9 publications

Reaction of Winter Wheat Cultivars to Artificially Inoculated Seed-borne Pink Snow Mold.

Reaction of Winter Wheat Cultivars to Artificially Inoculated Seed-borne Pink Snow Mold.

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

Cold induced expression of plant defensin and lipid transfer protein transcripts in winter wheat

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