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Aluminum toxicity studies in rice (Oryza sativa L.)

Creator:: Martinez-Racines, Cesar P.
Abstract:: A nutrient solution technique developed for wheat was used to determine tolerance of rice cultivars to aluminum (Al) toxicity. Pre-germinated rice seed was placed on top of a screen and allowed to grow on the Al-free solution for 72-96 hours or until the primary root was 2-3 cms long. Seedlings...
Resource Type:: Dissertation
Full Text:: nutrient solution at pH 4 and 25 oC +1. Cultivars such as Colombia 1, CICA 4, IR 5, IR 8 and IR 665-23-3-1

Production of haploid plants in selected winter wheat genotypes through anther culture and intergeneric crosses with maize

Creator:: Mendoza, Maria Graciela
Abstract:: A higher level of efficiency in the production of doubled-haploids must be achieved if this procedure is to be beneficial in plant improvement. Of equal importance is the development of protocols, which are not genotypic specific and result in progeny that represent a random sample of gametes from the parental...
Resource Type:: Dissertation
Full Text:: was more responsive for plantlet Redacted for privacy regeneration on P2 medium. No differences in

The influence of plant densities on gene action estimates and associations in seven winter wheat parents and their F₂ progeny

Creator:: Saini, Surinder Kumar
Abstract:: The F₂ progeny from a diallel cross involving seven winter wheat parents along with the parents were grown at the Hyslop Agronomy Farm near Corvallis, Oregon to determine the influence of three plant densities on gene action estimates for yield and its primary components. The plant densities were designed to...
Resource Type:: Dissertation
Full Text:: spikelet, 4) number of spikelets per spike, 5) tiller number and 6) plant height. A small additive

Duration and rate of the grain filling period and subsequent grain yield in crosses between facultative and winter wheat cultivars (Triticum aestivum L. em Thell)

Creator:: Mou, Beiquan
Abstract:: Concerns about the genetic control and environmental influence of various stages of development including the grain filling period, and the relationship between early maturity and grain yield prompted this study. The experimental material consisted of two facultative and two winter wheat cultivars. A dial!el cross, excluding reciprocals, was also developed...
Resource Type:: Masters Thesis
Full Text:: dominance for early heading, a range from no to complete dominance for early flowering and no dominance for

Estimates of genetic variability resulting from single, top, and double cross populations in durum wheat (Triticum turgidum L. var. durum)

Creator:: Abdennadher, Mourad
Abstract:: The success of a plant breeding program depends upon the availability of useable genetic diversity. Such diversity may be enhanced depending on the type of hybridization strategy employed. Segregating progenies resulting from F2 populations, a double cross, and a top cross were compared for the amount of useable genetic diversity...
Resource Type:: Masters Thesis
Full Text:: . Traits evaluated were (1) plant height, (2) days to maturity, (3) harvest index, (4) kernel weight, (5

Evaluation of four quality factors in a selected winter x spring wheat cross (Triticum aestivum Vill., Host)

Creator:: Schumaker, Karen Sue
Abstract:: The nature of the genetic variation associated with a cross involving winter and spring wheat parents for four quality factors was evaluated. Yamhill, a soft white winter wheat, and Inia 66, a hard red spring wheat, were selected as parents for this study. They represented distinctly different phenotypes for the...
Resource Type:: Masters Thesis
Full Text:: mean value approaching that of the recurrent parent. No transgressive segregation was observed in the

Combining ability and associations of agronomic traits involving three sources of dwarfism in wheat (Triticum aestivum, L. em Thell)

Creator:: Maya de Leon, Jose Luis
Abstract:: Three genetically different dwarf cultivars of spring wheat were evaluated as potential sources of short stature to use in a wheat improvement program. The study involved a five parent diallel cross which included a semidwarf, a standard height and three dwarf cultivars. The genetic sources of dwarfism included a Norma...
Resource Type:: Dissertation
Full Text:: tillers, (4) number of spikelets per spike, (5) head length, (6) days to maturity, (7) grain yield, (8

Possible compensations of the components of grain yeild in wheat (Triticum aestivum L.) as influenced by genotype by environment interactions

Creator:: Bedoshvili, David
Abstract:: Despite many investigations genotype by environment interaction remains one of the least understood factors in plant improvement. Understanding genotypic differences responsible for such interactions could assist in making more informed breeding decisions. The components of yield being less complex than grain yield per se may be useful for selection to...
Resource Type:: Dissertation
Full Text:: Septoria spp. were responsible for interactions for grain yield. However, no consistent patterns of

Potential reciprocal differences for selected traits in six different F₁ wheat populations

Creator:: Stein, Ira Steven
Abstract:: Concerns about the possible reciprocal differences resulting from systematic crossings of winter and spring wheat gene pools prompted this investigation. If traits can be improved by simply reversing the direction of a cross, then identification of the best female parent in a cross would be helpful for breeding programs. Two...
Resource Type:: Masters Thesis
Full Text:: Science in Crop Science presented on January 4, 1984 Title: Potential Reciprocal Differences for

Identification and development of cultural practices for upland rice production systems for savanna soils of Colombia

Creator:: Leal-M, Dario
Abstract:: A great potential for increasing upland rice production exists in the savanna soils of Colombia. These vast areas are currently underutilized. However, they have good soil structure, flat topography, coupled with sufficient and well distributed rainfall, making savanna soils ideal for upland rice cropping system. The major constraints to upland...
Resource Type:: Dissertation
Full Text:: and 1984. Cultivars such as Perola, Tox 1011-4-2, IAC 47, IAC 165, IRAT 101 and Makalioka 34 showed

ScholarsArchive@OSU

Aluminum toxicity studies in rice (Oryza sativa L.)

Production of haploid plants in selected winter wheat genotypes through anther culture and intergeneric crosses with maize

The influence of plant densities on gene action estimates and associations in seven winter wheat parents and their F₂ progeny

Duration and rate of the grain filling period and subsequent grain yield in crosses between facultative and winter wheat cultivars (Triticum aestivum L. em Thell)

Estimates of genetic variability resulting from single, top, and double cross populations in durum wheat (Triticum turgidum L. var. durum)

Evaluation of four quality factors in a selected winter x spring wheat cross (Triticum aestivum Vill., Host)

Combining ability and associations of agronomic traits involving three sources of dwarfism in wheat (Triticum aestivum, L. em Thell)

Possible compensations of the components of grain yeild in wheat (Triticum aestivum L.) as influenced by genotype by environment interactions

Potential reciprocal differences for selected traits in six different F₁ wheat populations

Identification and development of cultural practices for upland rice production systems for savanna soils of Colombia

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