Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 208 for “"photoperiod"”.
-
Photoperiod, Brain Plasticity, and Behavior
… the suite of season-specific adaptations. Photoperiodism is the ability of plants and animals to measure environmental day length (photoperiod) to ascertain the time of year and engage in seasonally appropriate adaptations; the annual cycle of changing photoperiod provides the environmental …
-
The effect of photoperiod on juvenile turbot (Scophthalmus maximus)
Vöxtur, fóðurnýting, atferli og súrefnisnotkun sandhverfuseiða, sem alin voru við mismunandi ljóslotu, var borinn saman í tilraun sem stóð yfir í 11 mánuði. Fiskarnir voru aldir við þrenns konar ljóslotur: Stöðugt ljós (LD24:0), langa dagsbirtu (LD16:8) og ljóslotur þar sem fiskarnir voru fyrst …
-
Studies of Soybean Maturity Genes (Glycine Max, Photoperiod, Flowering)
Studies were conducted to investigate the genetics of reproductive development and latitudinal adaptation in soybeans {Glycine max (L.) Merr.}. Maturity gene isolines that were developed in the backgrounds of the cultivars Clark and Harosoy were used to examine the effects of maturity gene pairs …
-
Understanding the mechanisms of the photoperiod flowering pathway in soybean
UNDERSTANDING THE MECHANISMS OF THE PHOTOPERIOD FLOWERING PATHWAY IN SOYBEAN BY WILLIAM BRIAN PRICE THESIS Submitted in partial fulfillment of the requirements for the degree of Master of Science in Crop Sciences in the Graduate College of the University of Illinois at Urbana-Champaign, 2012 …
-
Photoperiod sensitivity in tropical maize accessions, early inbreds, and their crosses
… x tester interaction for genes controlling photoperiod. The six populations were: (1) Caingang (BOV 78) from Brazil; (2) Negro de Tierra Caliente (GUA 146) (NDTC-146) from Guatemala; (3) Lenha (RGS XX) from Brazil; (4) Negrito from Colombia; (5) Costeno (VEN 453) from Venezuela; and (6) …
-
Effects of photoperiod on weight maintenance in adult neutered male cats
… activity-related weight management strategies. Photoperiod is known to cause physiological changes in seasonal mammals, including changes in body weight (BW) and reproductive status. Thus, our objective was to determine the effect of increased photoperiod (longer days) on voluntary physical …
-
Responses Of Cryptobranchus Alleganiensis Alleganiensis To Different Oxygen Concentrations, Temperatures And Photoperiod
… 75 percent, 100 percent) and day and night photoperiods. Minutes moving, minutes rocking, periods of rocking, periods of moving, periods of quiescence, and number of rocks were recorded for each fifteen-minute period of each two-hour experiment. Results indicate that rocking and moving both …
-
Height control of Eschscholtzia californica using ancymidol, cycocel, and limited inductive photoperiod
Limited inductive photoperiod (LIP) significantly reduced stem length but had no effect on the peduncle length, leaf number, plant diameter, days from seed to first flower or days from start of long days (LD) to first flower in Eschscholtzia californica. However with fewer LD cycles, negative …
-
Effects of size, age and photoperiod on hypoosmoregulation in brook trout, Salvelinus fontinalis
… fontinalis) raised from eggs under two photoperiod and two feeding regimes were tested for physiological changes preparatory for transition from freshwater to seawater. Size, age, growth rate, photoperiod, and diel rhythms were examined for possible influences on plasma osmolarity, …
-
Ethanol from photoperiod-sensitive sorghum: a study on biomass structure and process optimization
… fuel with economic and environmental advantages. Photoperiod-sensitive (PS) sorghum, because of its high biomass yield (2.6 kg dry mass/m2), about 18% of soluble sugar in dry mass, and drought tolerance, is a promising biomass for ethanol production. The overall goals of this study are to develop …
-
Diapause Termination in the Tobacco Hornworm: Deep Diapause, Diapause Maturity, Photoperiod and Wounding
Made available in DSpace on 2014-12-09T20:27:28Z (GMT). No. of bitstreams: 1 7001020.pdf: 5485210 bytes, checksum: cd7a217c3a54c14e612e567a4b437b93 (MD5) Previous issue date: 1969
-
Biomass yield potential and nitrogen use efficiency of the photoperiod-sensitive energy sorghum
… and the environment. Four hybrids with different photoperiod-sensitivity (TX08001, TX17500, TX17600, TX17800) were studied for yield potential and N response under four N rates (0, 56, 112, 168 kg N ha-1) using aqueous urea ammonium nitrate (UAN: 32-0-0) in two locations (Urbana, IL and College …
-
Floral initiation in <i>Rudbeckia hirta</i>: limited inductive photoperiod, polyamines and cytokinins
… occurred. When subjected to limited inductive photoperiods, R. hirta responded with a delay in flowering if the plants were returned to short days (SD) before bract initiation. Increased exposure to long days (LD) increased stem height and enhanced floral development. A limited induction period …
-
The Effects of Artificial Photoperiod on Age at Puberty in Fall-born Ewe Lambs
… examined the effects of an artificial photoperiod on puberty in fall-born ewe lambs. Replicate I was initiated in December 2011 with prepubertal Dorset ewe lambs (n = 44). Replicate II was initiated beginning in December 2012 and included prepubertal Dorset, Suffolk x Dorset and Texel x …
-
Dissecting Earliness per se and Photoperiod heading date effects in bread wheat (Triticum aestivum)
Vernalization, photoperiod and the poorly defined earliness per se (Eps) genes regulate flowering in plants. This thesis used elite hexaploid wheat varieties and focused on an Eps QTL on 1DL, and photoperiod QTLs on 1BL and 5AL short day QTL using doubled haploid (DH) populations. Four independent …
-
Photoperiod and nutritional influences on reproduction, growth and pelage changes in the pine vole
… than those fed only chow. Adults on a 14L:10D photoperiod had higher values for reproductive characteristics than those on a declining photoperiod. In a third experiment juveniles fed a horse chow diet supplemented with apples had higher body weights and more body fat, initiated and completed …
-
Response rainbow trout (Salmon gairdneri) blood gas transport system to temperature, oxygen availability and photoperiod
… oxygen availability «35%, >70% saturation) and photoperiod (16L:8D, 8L:16D) and evaluated by 3-factor analysis of variance. Hemog l obin and hematocrit , indicators of oxygenc arrying capacity increased significantly at the higher temperature, following exposure to hypoxia and in relation to …
-
Temperature and photoperiod effects on growth and development of day-neutral, junebearing and everbearing strawberries
… (DN) strawberries (Fragaria X ananassa Duch.) to photoperiod and temperature under controlled environment conditions were studied and compared to those of Junebearers (JB) and everbearers (EB). At a constant 21°C, DN cultivars flowered under 9 hour days (SD), night interrupted SD (NI) and 16 hour …
Page 1 of 11