Varietal Difference of Physical Characteristics of the Culm Related to Lodging Resistance in Paddy Rice.

Ookawa, Taiichiro; Ishihara, Kuni

doi:10.1626/jcs.61.419

Cited by 118 publications

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“…Although a short rice plant does not guarantee a high degree of lodging resistance (Ookawa and Ishihara, 1992), most of the Afghan native rice cultivars with tall culm were susceptible to lodging after heading stage. Thus, breeding for reduction of the plant height is an important objective in Afghanistan.…”

Section: Results and Discussion 1．agronomical Characterizationmentioning

confidence: 98%

Characterization of Aroma and Agronomic Traits in Afghan Native Rice Cultivars

Sarhadi

Ookawa

Yoshihashi

et al. 2009

Plant Production Science

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: In this study, we collected native aromatic rice cultivars from north, east and northeast of Afghanistan, and check cultivars from Japan, Thailand and India. We characterized some important agronomic characters such as plant height, panicle number per plant, grain number per panicle, 1,000-grain weight, grain length and grain width to find the desirable characters for breeding programs. Many of them were classified into tall culm rice according to IRRI index, but had thin and slender grain, and strong aroma which are favorable characteristics in Afghanistan and surrounding regions. The aromatic character was characterized by three methods, 1.7% KOH sensory test, gas chromatography-mass spectrometry-selected ion monitoring (GC-MS-SIM), and polymerase chain reaction (PCR) analysis. These three methods gave similar results. Six out of 10 Afghan native rice cultivars were aromatic and four non-aromatic. Among the check cultivars, Basmati 370, Jasmine 85, Izayoi, Oitakoutou and Jakouine were aromatic and Nipponbare non-aromatic. Improvement of aromatic and high yielding rice and reduction of plant height are the important objectives for rice breeding in Afghanistan. The results showed that Pashadi Konar from Afghanistan has the intermediate plant height, heavier 1,000-grain weight (32 g), longer grain (11 mm) and favorable aroma. Therefore, this cultivar may be a good source of aromatic rice germplasm in Afghanistan. To clarify the genetic nature of aroma in rice, we crossed non-aromatic cultivar Nipponbare with aromatic cultivar Jasmine 85, and examined the aromatic character in the F 2 generation by 1.7% KOH sensory test and PCR analysis. Non-aromatic and aromatic characters were segregated at a ratio of 3:1, showing that aroma is controlled by a single recessive gene.

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Section: Results and Discussion 1．agronomical Characterizationmentioning

confidence: 98%

Characterization of Aroma and Agronomic Traits in Afghan Native Rice Cultivars

Sarhadi

Ookawa

Yoshihashi

et al. 2009

Plant Production Science

Self Cite

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“…Chugoku 117, a lodging~tolerant high ~ yielding cultivar despite its long culm (Ookawa and Ishihara, 1992), showed 16% higher grain yield than Nipponbare due to the larger sink size but the grain yield was lower than that in Takanari (Table 1). It also showed higher CGR (Fig.…”

Section: Discussionmentioning

confidence: 99%

Effects of Flag Leaves and Panicles on Light Interception and Canopy Photosynthesis in High-Yielding Rice Cultivars

Saitoh

Yonetani

Murota

et al. 2002

Plant Production Science

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“…The lodging of straws in tall varieties, according to Japanese scientists, is due to low tensile strengths of the straw. Shorter straw-height and leaf sheath covering enable rice to tolerate heavier load and avoid lodging (Ookawa and Ishihara, 1993). The US varieties and the Interspecific progenies were similar, and had shorter plant types (table 2).…”

Section: Morphology and Phenological Characteristicsmentioning

confidence: 97%

Genetic Variability In Morphological And Physiological Traits Within And Among Rice Species And Their Interspecific Progenies

Guéi¹,

Abamu²,

Karim³

et al. 2009

Agronomie Africaine

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This study compares genetic variation in morpho-physiological traits within and among five groups of Oryza species. Several morphological and phenological characters were measured in field trials. Results showed that genetic variation exits among and within these groups for the characters measured. More O. glaberrima and traditional O. sativa possess attributes which indicate they are better adapted to suboptimal growing conditions that characterize rice cultivation in West Africa, but are poor yielding. The interspecific progenies possess characters that cover the range of both their parents. Cluster analysis amalgamated some as possessing the adaptive morphological traits of their O.glaberrima parents, and the panicle and yield attributes of improved O. sativa parents. O. sativa of temperate origin, but of tropical japonica genetic background did not show characters for adaptability to the West African upland conditions, but was similar to interspecifics and other adapted genotypes groups that possess panicle and spikelet characteristics. Those ones could be exploited for extending present yield levels.Keywords : Germplasm characterization, Oryza glaberrima, Oryza sativa, genetic variation, West Africa. RESUME VARIABILITE GENETIQUE DES TRAITS MORPHOLOGIQUES ET PHYSIOLOGIQUES CHEZ LES ESPECES DE RIZ ET LEURS DESCENDANCES

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Varietal Difference of Physical Characteristics of the Culm Related to Lodging Resistance in Paddy Rice.

Cited by 118 publications

References 0 publications

Characterization of Aroma and Agronomic Traits in Afghan Native Rice Cultivars

Characterization of Aroma and Agronomic Traits in Afghan Native Rice Cultivars

Effects of Flag Leaves and Panicles on Light Interception and Canopy Photosynthesis in High-Yielding Rice Cultivars

Genetic Variability In Morphological And Physiological Traits Within And Among Rice Species And Their Interspecific Progenies

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