180,041 research outputs found
Time series modelling and forecasting of Sarawak black pepper price
No full textPepper is an important agriculture commodity especially for the state of Sarawak. It is important to forecast its price, as this could help the policy makers in coming up with production and marketing plan to improve the Sarawak’s economy as well as the farmers’welfare. In this paper, we take up time series modelling and forecasting of the Sarawak black pepper price. Our empirical results show that Autoregressive Moving Average (ARMA) time series models fit the price series well and they have correctly predicted the future trend of the price series within the sample period of study. Amongst a group of 25 fitted models, ARMA (1, 0) model is selected based on post-sample forecast criteria.Time series; pepper (Piper nigrum L.); Autoregressive Moving Average model; forecasting; forecast accuracy
TRADITION, QUALITY AND BIOTECHNOLOGY IN HUNGARIAN SPICE PEPPER (Capsicum annuum L.) BREEDING
No full textSpice pepper production has a history of almost 300 years in the southern part of
Hungary. In this study the results of two biotechnological improvements are summarized.
Anther and isolated microspore culture techniques were improved to release haploid and
doubled haploid (DH) lines for spice pepper breeding. Both the anther and isolated
microspore culture methods were successfully used in spice pepper haploid production.
Microspore culture- derived structures were analysed to identify their different parts.
Green plantlets were regenerated from embryos derived from both anther and microspore
cultures. Their doubled haploid analogues were integrated into Hungarian spice pepper
hybrid seed breeding programmes. One hybrid, Sláger, was released as a new genotype for
spice pepper production in 2008 and two hybrid candidates (Délibáb and Bolero) are now
being tested in official trials
EFFECTS OF AGRONOMIC VARIABLES AND HINERITANCE ON AROMATIC COMPONENTS IN BASIL AND CHILI PEPPER
No full textThis PhD Thesis focuses on how aroma profile in crops is affected by agronomic and genetic variables. In the first chapter we considered the effects of salt stress on main morphological and physiological traits of two cultivars of sweet basil (Genovese and Napoletano) Specifically, we focused on compositional changes in aroma profile and their possible significance in adaptation and tolerance to the oxidative stress.
In the second chapter, we considered the aroma profile of two chilli pepper species, Habanero (Capsicum chinenese) and Jalapeño (Capsicum Annuum), at different stages of maturity. Moreover, preliminary results of genetic mapping process were introduced.
Part of this research has been conducted at University of California-Davis (USA)
Letter, 1839 Jan. 7, Logansport, to Col. A.C. Pepper, Washington, D.C.
No full textHandwritten letter (copy)
From: George Winter, Logansport, Jan. 7, 1839
To: Col. A.C. Pepper (Indian agent), Washington, D.C.
AL (unsigned), 3 p. (one sheet, folded)
Relating to his just completed painting of Indian Council: arrangements to ship it to Pepper (via General Tipton); artistic techniques used; individuals depicted (Nas-waw-kay, Wee-wiss-see, I-o-wa, Pash-po, M"jo-quis, 0-go-moss, Knee-bush, Kee-wawjnay, Kar-kar-ky, Col. Daniel); his recent illness, price of painting($100); request to show it to "the Department.
Seed Quality, and Fatty Acid and Sugar Contents of Pepper Seeds (Capsicum annuum L.) in Relation to Seed Development and Drying Temperatures
No full textThis study was carried out in order to determine the effects of drying temperature (25, 35, and 45 degrees C) and the developmental stage (55, 65, 75, and 85 days after anthesis (DAA)) on germination, vigor, and the sugar (sucrose, glucose, fructose) and fatty acid contents of pepper seeds (Capsicum annuum L.) over 2 consecutive years. In seeds harvested at 75 DAA and after, seed viability and vigor were not influenced by drying at temperatures up to 45 degrees C. Linoleic acid (18:2) was the main fatty acid in pepper seeds, comprising 75-80% of total fatty acids. It was followed by oleic (18: 1) and palmitic (16:0) as roughly 10%-12% and stearic (18:0) as 3%. The results indicated that drying seeds at different temperatures does not change fatty acid composition. Approximately 30% of the pepper seeds are constituted of sucrose, and this did not change with maturity level between 55 and 85 DAA. nor did it change at different drying temperatures. However, the levels of fructose and glucose gradually decreased as the developmental stage advanced and both were lower than 4% of total sugar at the final harvest. Seeds dried at 45 degrees C had lower amounts of sugar compared to those dried at 25 and 35 degrees C. Seed quality and fatty acid and sucrose composition do not change as long as the seeds are harvested within 75 DAA
Letter, 1838 Apr. 10, Logansport, to Col. A.C. Pepper
No full textHandwritten letter (copy) From: George Winter, Logansport, April 10, 1838 To: Col. A.C. Pepper, Indian agent, Logansport ALS, 2 p. (one sheet, folded) Suggesting that he be commissioned by "the Department" to paint portraits of important local Indians. Accompanying letter was portrait of Nas-waw-kay and sketch of Council of July 21, 1837. Suggests that a full painting of the Council be commissioned; he has studies of the scene
Observing population changes of thrips (Thysanoptera) species damaging forced pepper and their natural enemies
No full textBy the strengthening of environmental protection and food safety efforts in Hungary, integrated and especially biological pest
control methods should increasingly put forward, for which a solid knowledge on the life course and efficiency of natural enemies applied
against certain pests is necessary. Pepper has distinguished significance in domestic vegetable forcing, and the profitability of production is
determined primarily by the efficiency of the control of thrips pests. This is why we attached great importance to study what results may be
expected by introducing arthropod predators (Amblyseius cucumeris, Orius laevigatus) to control thrips species under domestic conditions on
rock wool in a long vegetation period pepper culture. We also liked to find out what kind of role the cultivars play in the change of
phytophagous and zoophagous populations. The A. cucumeris predatory mite introduced in late January proved to be effective in controlling
thrips pests until mid-April. Despite repeated introductions, the predatory bug O. laevigatus (Heteroptera: Anthocoridae) did not proliferate.
Among the three pepper cultivars (Hó, Keceli, Titán) grown at Ráckeve, thrips species proliferated in the highest number on cultivar ‘Hó’,
while the population of predatory mites was lowest on the cultivar ‘Titán’, compared to the other two cultivars
Transcription of letter, 1838 Jan. 7, Logansport, Ind., to Col. A.C. Pepper
No full textNote, begins "Geo Winter to Col A C Pepper copy of letter Dated Logansport Ind Jany 7 1838..." (in Cable Ball's handwriting, probably c. 1918-1920) AN, 2 p. (1 sheet, written in pencil)
Transcription or summary of above-mentioned letter, dealing with painting of Council of Kee-waw-nay. Pepper's and Sands' portraits are considered good likenesses. To the left, Nas-wau-kay stands (dress described), with We-wiss-see, Iowaw, Pash-po, and M-jo-quis seated behind in a line. Near the latter stands I-go-moss (the blind chief). Knee-bush's head reclines against a tree; Kar-kar-ky sits with a stick near the feet of Col. Dunn. List of those present, on behalf of both the government and the Indians, at the Council of Kee-waw-nay, July 21, 1837. Cable Ball appends a note regarding the replacement of the red blanket over the conference table with a white blanket, at Barron's suggestion
Genetic variability of anther donor versus spontaneous doubled haploid descendents and colchicine induced doubled haploid sweet pepper (Capsicum annuum L.) lines
No full textHaploid (n) and doubled haploid (DH) plants were developed in anther culture of sweet pepper
(Capsicum annuum L.). Regenerants were analyzed by flow cytometry for haploid (n = 12)
and spontaneous doubled haploid (2n = 24) genomes. Haploid plants were forwarded to
colchicine-treatment for induced doubled haploid (2n·) plant production. Molecular
polymorphism of anther donor plants (2n), the haploid regenerants (n), the spontaneous (2n) and
induced (2n·)-DH plants were analysed by RAPD-, SSR- and ISSR-PCR. The analysis of
anther-donor plants compared to DH-descendents showed an unexpectedly wide range of
molecular polymorphism. Our results suggest that genetic changes occurring during meiotic
recombination is higher than those of occurring during colchicine-induced genomic duplication
Androgenesis induction in microspore culture of sweet pepper (Capsicum annuum L.)
No full textIsolated microspore culture experiments were
carried out in sweet pepper (Capsicum annuum L.) F1
hybrid genotypes. In the first experiment, four culture media
(W14, B5, MS and NLN) were compared to test their
effectiveness in inducing the formation of microsporederived
structures in two genotypes. The experiments
revealed the superiority of B5 medium. In the second
experiment, the effects of different ratios of 2,4-dichlorophenoxyacetic
acid (2,4-D) (0, 0.1, 0.2 and 0.5 mg l-1) and
kinetin (0, 0.2 and 0.5 mg l-1) were also investigated in B5
medium with two genotypes. The effect of growth regulators
were investigated on the production of microsporederived
calli and embryo-like structures (ELSs), the ratio of
the two and plant regeneration (number of regenerated
plantlets) in microspore culture. The histological experiments
revealed the differences between the microsporederived
ELSs and calli. The most promising results were
obtained on the investigated parameters in the presence of
0.1 mg l-1 2,4-D and 0.2 mg l-1 kinetin producing the
highest number of plantlets in both genotypes tested. In the
response of 11 genotypes, the androgenesis induction was
successful in each sweet pepper genotypes tested using the
best basic medium and growth regulators combination.
In case of 11 genotypes, the number of ELSs ranged from
20 to 100/Petri dish (an average of 48.1 ELS/Petri dish),
while the number of green plantlets varied from 0 to 8
plantlets/Petri dish (an average of 1.5 plantlets/Petri dish)
depending on the genotype. The spontaneous rediploidization
rate obtained was 25% in isolated microspore
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