Genotypic difference in root penetration ability by durum wheat (Triticum turgidum L. var. durum) evaluated by a pot with paraffin-Vaseline discs

Kubo, Katashi; Jitsuyama, Yutaka; Iwama, Kazuto; Hasegawa, Toshihiro; Watanabe, Naoharu

doi:10.1023/b:plso.0000037033.23964.54

Cited by 24 publications

(33 citation statements)

References 41 publications

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“…In the second experiment with Honsyu cultivars, 27 cultivars bred in Tohoku, Kanto, Chubu and Chugoku districts, and 11 cultivars bred in Kyusyu district were used (Table 2). In each experiment, two Ethiopian landraces with high PA (ET-31 A-1-113 and ET-47 B-3-115), two CIMMYT cultivars with low PA (Plover 'S' and Bittern 'S') identifi ed in the previous study (Kubo et al, 2004), and Norin 61, the Japanese leading cultivar, were investigated in both experiments as check cultivars.…”

Section: Methodsmentioning

confidence: 99%

“…2). The average hardness of the PV disc during the experiments showed little difference (0.46 MPa and 0.48 MPa in the fi rst and second experiments, respectively), and were within the 0.43-0.50 MPa in our previous experiments, in which PA of durum wheat genotypes was examined (Kubo et al, 2004(Kubo et al, , 2005. Table 1.…”

Section: Experimental Conditionsmentioning

confidence: 99%

“…Because the hardness of the PV disc varies with the temperature, the hardness was estimated by using a regression formula of the relationship between the temperature and the hardness of the PV mixtures, Y = −0.360Log e (X) + 1.533, where, Y (MPa) is the hardness of the PV disc, and X (°C) is the temperature of the PV disc (Kubo et al, 2004). This formula was obtained by measuring the hardness with Yamanaka's hardness tester at fi ve temperature levels (3, 8, 20, 30 and 40°C).…”

Section: Methodsmentioning

confidence: 99%

“…In a previous study (Kubo et al, 2004), we found a large genotypic difference in soil-penetrating ability of root (PA) in durum wheat (Triticum turgidum L. var. durum) using a pot installed with a disc made of a mixture of paraffi n and Vaseline as a substitute for hard soil layer.…”

mentioning

confidence: 99%

“…Also in Hokkaido district, Japan, wheat yields are reduced because of shallow root systems due to hard soil layers, especially in years with low precipitation (Itoh et al, 2001;Sato et al, 2004). For a stable wheat production on hard soil regions, genetic improvement of the ability of roots to penetrate into hard soil layers is important (Zubaidi et al, 1999;Kubo et al, 2004).…”

mentioning

confidence: 99%

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Genotypic Variation of the Ability of Root to Penetrate Hard Soil Layers among Japanese Wheat Cultivars

Kubo

Iwama

Yanagisawa

et al. 2006

Plant Production Science

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Conditionsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Genotypic Variation of the Ability of Root to Penetrate Hard Soil Layers among Japanese Wheat Cultivars

Kubo

Iwama

Yanagisawa

et al. 2006

Plant Production Science

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Drought Resistance and Its Improvement

Blum¹

2010

Plant Breeding for Water-Limited Environments

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The reduced height genes do not affect the root penetration ability in wheat

et al. 2005

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Root penetration (RP) ability into compacted soil is an important breeding target for drought avoidance by durum (Triticum turgidum L. var. durum) and bread wheat (T. aestivum L.) in regions with compacted soils and water deficits. However, it is said generally that yield of the current cultivars introduced the reduced height gene (Rht-B1b or Rht-D1b) are more sensitive to drought stress than that of old landraces. This study investigated the effect of the Rht genes on RP ability using the seedlings of near-isogenic lines (NILs) of Rht genes of 'LD222' durum wheat and 'April Bearded' bread wheat, and 110 recombinant inbred lines (RILs) of durum wheat derived from the cross between the tall landrace (Jennah Khetifa; Rht-B1a Rht-B1a) and semi-dwarf cultivar (Cham1; Rht-B1b Rht-B1b). One seedling of each genotype was grown in a pot (6 cm diameter, 15 cm height) with a disc of 3 mm thickness made from paraffin and Vaseline mixture (PV) in 10 cm depth, as a substitute for a compacted soil layer. The RP index [number of roots penetrating through the PV disc per plant (PVRN)/total number of seminal and crown roots per plant (TRN)] was measured at eight weeks after sowing and used as the indicator of RP ability of seedling. In NILs, the shoot length decreased significantly because of the introduction of either Rht-B1b or Rht-D1b dwarfing genes, but the RP index was similar to those of tall parents. In RILs, although the RP index and shoot length were higher in Jennah Khetifa than in Cham1, the relationship between RP index and shoot length was not significant (r = 0.156). Both results indicate that RP ability of wheat does not link to dwarfness regulated by Rht genes. We suppose therefore that it would be possible to develop a high yielding semi-dwarf cultivar with excellent RP ability.

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Genotypic difference in root penetration ability by durum wheat (Triticum turgidum L. var. durum) evaluated by a pot with paraffin-Vaseline discs

Cited by 24 publications

References 41 publications

Genotypic Variation of the Ability of Root to Penetrate Hard Soil Layers among Japanese Wheat Cultivars

Genotypic Variation of the Ability of Root to Penetrate Hard Soil Layers among Japanese Wheat Cultivars

Drought Resistance and Its Improvement

The reduced height genes do not affect the root penetration ability in wheat

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