scholarly journals Influence of origin and size of potato planting material on morphological characteristics of seed tubers

2021 ◽  
Vol 25 (1) ◽  
pp. 20-23
Author(s):  
Dobrivoj Poštić ◽  
Ratibor Štrbanović ◽  
Zoran Broćić ◽  
Tatjana Popović ◽  
Sanja Marković ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Seed Tuber ◽  
Morphological Characteristics ◽  
Lower Number ◽  
Potato Cultivars ◽  
Lower Altitude ◽  
Seed Tubers ◽  
Planting Material ◽  
Material Factor ◽  
Factor G

The aim of this study was to determine the influence of the origin and size of planting material on the morphological characteristics of seed tuber's three potato cultivars. The objects of research were three varieties of potatoes: Aladdin, Newton and Desiree. The analysis of the morphological characteristics tuber showed highly significant (r<0.01) differences under influenced origin planting material (factor O) and size of seed tuber (factor S). Significance influence (r<0.01) genotype (factor G) was detected on the number of sprouts per tuber and sprouts length. Seed tubers originating from a lower altitude (350 m a.s.l.) formed a significantly (r<0.01) greater number of sprout per tuber, 0.59 or 7.33% more in comparison with tubers originating from 1300 m a.s.l. Statistical analysis of the number of sprouts per tuber showed a significantly (r<0.01) lower number of germs in fractions of 40 and 60 g, compared to the larger fraction of 80 g.

EFFECTS OF TEMPERATURE AND SEED TUBER BUD POSITION ON SHOOT EMERGENCE OF THE POTATO CULTIVARS JEMSEG AND CONESTOGA

1987 ◽  
Vol 67 (2) ◽  
pp. 599-603 ◽  
Author(s):  
A. W. McKEOWN
Keyword(s):  
Seed Tuber ◽  
Potato Cultivars ◽  
Seed Tubers ◽  
Solatium Tuberosum ◽  
Delayed Emergence ◽  
Early Maturing ◽  
Basal Portion ◽  
Bud Position ◽  
Effects Of Temperature ◽  
Cut Seed

Shoots of the early-maturing potato (Solatium tuberosum L.) cultivar Jemseg often do not emerge uniformly when cut seed pieces are planted in cold soil. Under controlled temperatures of 10, 15 and 20 °C, shoots from whole tubers and basal portions of Jemseg tubers emerged later than those from apical portions of seed tubers. The delayed emergence of the basal portion was most pronounced at low temperatures and ranged from 5 to 17 d. Emergence from basal vs. apical portions of Conestoga was delayed by 10 d at 10 °C and by 4 d at 15 °C, only when seed tubers with a single dominant apical sprout were used. There was no delay at 20 °C. The variable time to emergence of shoots in the field can be explained by delayed emergence from basal buds on cut seed pieces.Key words: Potato, cultivars, emergence, bud position, temperature, seed tuber

Determination of optimum tuber planting density in the potato varieties Pentland Squire, Cara, Estima, Maris Piper and King Edward

1992 ◽  
Vol 119 (1) ◽  
pp. 35-44 ◽  
Author(s):  
D. C. E. Wurr ◽  
J. R. Fellows ◽  
E. J. Allen
Keyword(s):  
Complex Analysis ◽  
Seed Tuber ◽  
Tuber Size ◽  
Planting Density ◽  
Potato Seed ◽  
Stem Density ◽  
Seed Tubers ◽  
Net Returns ◽  
Analysis Technique ◽  
The Cost

SummaryThirty-two experiments examining the effects of the weight and within-row spacing of potato seed tubers on graded tuber yields of five varieties were conducted on eight sites from 1980 to 1985. A complex analysis technique was used to combine these data and estimate the optimum tuber planting densities for different ratios of seed cost to small (40–60 mm) and large (60–80 mm) ware value. The same technique could be applied to any other combination of seed cost, ware size and ware value.The optimum tuber planting density decreased with increasing seed-tuber weight. Differences in optimum planting density between varieties were much greater with small (35 g) than with large (105 g) seed tubers and decreased as the cost of seed increased relative to the value of ware. As large ware became worth more than small ware the influence of increasing seed cost on the optimum density was reduced. As the value of large ware increased, net returns increased and the effect of seed cost on net returns was reduced. Mean tuber size decreased with increasing stem density at harvest and at the same stem density was lower in varieties producing more daughter tubers/stem. Changes of mean tuber size (μ) and the spread of yield across size grades (σ) with time were well described by parallel curves in different varieties. It is suggested that in future it may not be necessary to determine optimum tuber planting densities by complex experiments involving several seed-tuber weights and spacings. Instead μ and σ could be estimated from simple experiments and tuber spacings determined by comparison with control varieties.

scholarly journals Сlinical, immunological and morphological features in different types of autoimmune hepatitis

2020 ◽  
Vol 92 (2) ◽  
pp. 43-47
Author(s):  
Yu. G. Sandler ◽  
K. G. Saliev ◽  
S. N. Backih ◽  
S. G. Khomeriki ◽  
T. Yu. Khaymenova ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Statistical Analysis ◽  
Autoimmune Hepatitis ◽  
Clinical Laboratory ◽  
Clinical Manifestations ◽  
Morphological Characteristics ◽  
Morphological Features ◽  
Assessment System ◽  
Associated Diseases ◽  
Number Of Patients

Due to the absence of the pathognomonic diagnostic criteria and to the diversity of clinical, serological and morphological manifestations, the diagnostic of the autoimmune hepatitis (AIH) remains to be a difficult task, which might lead to the delay of the timely beginning of the immunosuppressive therapy (IST), which in turn affects the disease outcomes. Aim.To studying the clinical, biochemical, immunological and morphological markers in patients with seronegative (SN) and seropositive (SP) AIH and the qualities of their response to the IST. Materials and methods.This retrospective cohort study included 82 AIH patients over the course of the years 20142019. All patients were selected in accordance with the criteria of the simplified assessment system of the IAIHG. Clinical, laboratorial and morphological characteristics of the AIH were analyzed. Therapy response was evaluated by the level of the ALT and IgG in 612 months after the start of the IST. The study material underwent statistical analysis using methods of parametrical and nonparametrical analysis. Statistical analysis was performed in the Statistica 13.3 (developed by StatSoft Inc., USA). Results.67/82 (81.70%) of the patients studied were women, median age of 54 years old [38; 70]. Patients with the diagnosis of the possible AIH according to the IAIHG made 85.4% (70 people). Almost everyone 96% (79/82) had morphological features of the interface-hepatitis with the lymphocytic/plasmocytic infiltration; emperipolesis was discovered in 63% of patients (49/82), hepatocellular rosette in 23% (19/82). Patients with SN AIH comprised 36.5% (30/82), with SP 63.4% (52/82). Comparative analysis demonstrated that the clinical profile in patients with SN and SP AIH is the same, while the incidence of immuno-associated diseases is significantly higher in the group of seronegative AIH. The morphological profile in the two AIH groups is identical in both typical and atypical manifestations. The number of responders to IST was 63% (19/30) SN AIH vs 67% SP AIH (35/52), did not differ significantly (p=0.529).However, that the number of patients with liver cirrhosis in the SN AIH group was twice as big as the ones with SP: 37% vs 17% (p=0.089). Conclusions.A comparative analysis of clinical, laboratory, morphological and clinical manifestations in the SN and SP AIH groups did not detected statistically significant significant differences, which may indicate that SN and SP AIH are the faces of one disease. It is possible that AB cannot be identified within the known spectrum of antibodies, or antibodies have slow expression, or are suppressed by the immune system. In any case, suspicions of AIH, in the absence of antibodies, it is recommended that liver biopsy be performed for the timely diagnosis of AIH and IST. Сirrhosis was more often diagnosed in the group SN AIH, which may be due to a later diagnosis, and therefore to untimely IST. The found frequent association of SN AIH with other immune-associated diseases requires a carefully study of this problem. The variety of clinical manifestations of AIH requires further study, the identification of clinical phenotypes with certain feature. This can help in the future to timely identify potentially problematic patients and predict a response to IST.

scholarly journals Урожайность различных сортов картофеля и их повреждение вредителями в условиях Удмуртской Республики

2020 ◽  
Author(s):  
O.V. Esenkulova ◽  
О.V. Korobeinikova ◽  
M.P. Maslova
Keyword(s):  
Insect Pests ◽  
Potato Cultivars ◽  
Organic Fertilizers ◽  
Agrotis Segetum ◽  
Potato Tubers ◽  
White Grub ◽  
Severe Damage ◽  
Planting Material ◽  
Udmurt Republic

В рамках развития органического сельского хозяйства актуально выявление сортов с высокой устойчивостью к вредным организмам. В условиях Удмуртской Республики на дерново-среднеподзолистой среднесуглинистой слабосмытой почве в 2017-2018 годах проводились исследования, целью которых была оценка новых и перспективных сортов картофеля различных по срокам созревания. Одной из задач было выявление повреждений клубней вредителями. Изучали сорта картофеля разных сроков созревания: раннеспелые Нандина, Ред Соня, Колетте, Беллароза, Винета, Джоконда, Раноми среднеспелые Джелли, Вираж, Гала, Рябинушка, Каптива, Алуэт позднеспелые Ред Фентази, Церата КВС, Танго. Полевой однофакторный опыт закладывался согласно методике полевого опыта. Клубневой анализ проводили в соответствии с ГОСТ 33996-2016 Картофель семенной. Технические условия и методы определения качества. Коэффициент адаптивности изучаемых сортов картофеля рассчитан по методу Л.А. Животкова. За два года исследований более урожайными были раннеспелые сорта: Нандина, Ред Соня, Беллароза, Раноми среднеспелые: Джелли, Каптива, Алуэт позднеспелые: Ред Фентази и Церата КВС. Повреждение клубней картофеля личинками щелкуна (проволочником) было очень высоким и составило в 2017 году в среднем по сортам 47, в 2018 году 61. В оба года исследований клубни были повреждены личинками озимой совки (в среднем 3-4 ), личинками майского хруща (1-2 ). В 2018 году наблюдалось повреждение полевками (в среднем по сортам 3 ). Раннеспелые сорта являются более адаптивными к условиям Удмуртской Республики (коэффициент адаптивности 1,22 и 1,31). Однако качество посадочного материала не соответствует ГОСТ по проценту повреждений вредителями. Поэтому необходима тщательная сортировка и доведение клубней до регламентируемых показателей. Для снижения поврежденности в полевых условиях картофель требуется размещать после бобовых и крестоцветных культур, проводить известкование почв и вносить перепревшие органические удобрения.As part of the development of organic agriculture, the identification of varieties with high resistance to pests is relevant. In the conditions of the Udmurt Republic, studies were carried out in 2017-2018 on the derno-medium-soil average carbon-free weak soil, the purpose of which was to assess new and permissive potato cultivars of different maturation times. One challenge was to identify damage to tubers by insect pests and the possibility of using them as planting material. Potato cultivars of different maturation dates were studied: early Nandina, Red Sonya, Kolette, Bellaroza, Vineta, Dzhokonda, Ranomi medium Dzhelli, Virazh, Gala, Ryabinushka, Kaptiva, Aluet late Red Fentazi, Tserata KVS, Tango. Field one-factor experiment was laid according to the method of experimental work. Tuberous analysis was carried out in accordance with GOST 33996-2016 Seed Potatoes. Technical conditions and methods of quality determination . The coefficient of adaptivity of the studied potato cultivars is calculated according to the method of L.A. Zhemkov. More crop-producing were early cultivars: Nandina, Red Sonya, Bellaroza, Ranomi average: Dzhelli, Kaptiva, Aluet late: Red Fentazi and Tserata CF. During the years of research, there was damage to potato tubers by wireworm in 2017 on average 47, and in 2018 61. The only cultivar, Ranomi, was not damaged by the wireworm in 2017. A small number of tubers was damaged by larvae of turnip moth (Agrotis segetum) (3-4) and larvae of white grub (1-2). During two years of research in the Udmurt Republic early cultivars were more adaptive, the coefficient of adaptability was 1,31 and 1,22. However, the quality of the planting material by the percentage of damaged tubers by pests does not comply with state standard. For growing in the region, early cultivars Nandin, Red Sonya, Kolette, Bellarosa, Vineta, Dzhokonda, Ranomi are more suitable from middle cultivars Dzhelli, Kaptiva and Aluet turned out to be more stable from late ripening Red Fentazi. Due to severe damage by insect pests, especially wireworms, careful sorting and bringing tubers to regulated parameters, liming of soils, and introduction of rotted organic fertilizers are necessary, as well as to place potatoes in crop rotation after legumes and cruciferous crops.

scholarly journals The effect of herbicide applications on the content of ascorbic acid and glycoalkaloids in potato tubers

2011 ◽  
Vol 49 (No. 5) ◽  
pp. 237-240 ◽  
Author(s):  
K. Zarzecka ◽  
M. Gugała
Keyword(s):  
Ascorbic Acid ◽  
Statistical Analysis ◽  
Field Experiments ◽  
Potato Cultivars ◽  
Potato Tubers ◽  
Experimental Station

Field experiments were conducted at Zawady Experimental Station (UniversityofPodlasie) in 1999&ndash;2001 to test the effect of herbicides (Sencor 70 WG, Basagran 600 SL) and their mixtures (Sencor 70 WG with Fusilade Super, Basagran 600 SL with Focus Ultra) on the content of ascorbic acid and glycoalkaloids in tubers of three potato cultivars. The application of herbicides to potato fields caused an increase in the content of ascorbic acid in comparison with the control. The statistical analysis showed a&nbsp;significant effect of potato cultivars on ascorbic acid and glycoalkaloid concentrations.

scholarly journals The influence of minisett size and time of planting on the yield of seed yam (Dioscorea Rotundata)

2020 ◽  
Vol 56 (3) ◽  
pp. 469-481
Author(s):  
Beatrice Aighewi ◽  
Norbert Maroya ◽  
Djana Mignouna ◽  
Daniel Aihebhoria ◽  
Morufat Balogun ◽  
...  
Keyword(s):  
Food Security ◽  
West Africa ◽  
Production Systems ◽  
Seed Tuber ◽  
Block Design ◽  
Dioscorea Rotundata ◽  
Trade Off ◽  
Planting Material ◽  
Tuber Crop ◽  
Equivalent Area

AbstractIn traditional yam (Dioscorea spp.) production systems in West Africa, finding sole seed yam producers is rare and up to 30% of harvested tubers from the ware tuber crop is reserved to plant an equivalent area of the harvested crop during the next season. Many farmers typically must make a trade-off between food and seed in the use of available tubers. A study was carried out using a factorial experiment in a randomised complete block design to investigate the influence of planting different minisett sizes at different planting periods on the yield of seed yam with the aim of improving the availability of this expensive input and saving more ware tubers for food or sale. Results showed that by doubling or tripling the minisett size from 30 to 60 or 90  g, yields of seed yam increased by 61.1 and 103.3%, respectively. The 90 g minisetts had the highest values for all traits studied but had the least sett multiplication ratio. The early planted crop yielded 137% more than the late-planted crop. Significant interactions between minisett size, planting period and season were found. In 2016, although the highest yield of seed tubers was from early planted 90  g minisetts (35.6 t ha−1), the yield of early planted 30 g minisetts (23.8 t ha−1) was similar to those of 60 g planted mid-season (28.7 t ha−1) and 90 g planted late (20.0 t ha−1). To produce a high proportion of seed size tubers with less planting material, early planting of 30  g minisetts is recommended. Such practice will enhance seed tuber availability and food security by saving 1–2 t ha−1 of tubers that would have been used as seed instead of food.

scholarly journals Effects of Physical, Mechanical and Hormonal Treatments of Seed-Tubers on Bud Dormancy and Plant Productivity

Agronomy ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 33
Author(s):  
Paola A. Deligios ◽  
Emma Rapposelli ◽  
Massimiliano G. Mameli ◽  
Limbo Baghino ◽  
Gian Mario Mallica ◽  
...  
Keyword(s):  
Seed Tuber ◽  
First Year ◽  
Thermal Treatments ◽  
Productive Performance ◽  
Dormancy Breaking ◽  
Tuber Dormancy ◽  
Seed Tubers ◽  
Dormancy Period ◽  
Second Year ◽  
Haulm Killing

The aim of this study was to develop a technique easy to apply in order to induce seed-tuber dormancy breakage. Over a two-year study, more than seven dormancy-breaking treatments were tested through evaluating different temperature effects alone or combined with gibberellins application, cutting in half of seed-tubers, and early haulm killing. Three varieties per year were considered: Spunta and Monalisa (medium and long dormancy) in both years, Europa during the first year and Arinda during the second year (both characterized by a short dormancy period). We found firstly that Europa and Arinda promptly responded to thermal treatments, and secondly to the same thermal treatments in combination with the application of gibberellins. Although not easily applicable, especially when a large volume of seed-tubers has to be handled (seed-tuber producers), the cutting in half of the seed-tubers also had a satisfactory result. Notwithstanding that treatments did not perfectly overlap between the two experiments, results were qualitatively similar. Therefore, these findings allow us to conclude that treatment with post-harvest storage at 20 °C, followed by a treatment with gibberellic acid at 38 days from harvesting, is the most efficient in releasing dormancy, in ensuring a good vegetative growth and productive performance at field-level irrespective of the variety.

Effect of altering the physiological age of potato seed-tubers in the fall on subsequent production in a short-season environment

1992 ◽  
Vol 72 (1) ◽  
pp. 275-287 ◽  
Author(s):  
N. Richard Knowles ◽  
Gabor I. Botar
Keyword(s):  
Plant Growth ◽  
Harvest Index ◽  
Seed Tuber ◽  
Growing Season ◽  
Russet Burbank ◽  
Physiological Age ◽  
Quadratic Model ◽  
Tuber Quality ◽  
Potato Seed ◽  
Seed Tubers

The efficacy of utilizing "controlled seed-tuber aging" as a technique to enhance yield and improve tuber quality in areas with relatively short growing seasons was investigated in a 3-yr study. Prior to planting in the field, five physiological ages of Russet Burbank, Carlton, Norchip and Superior seed-tubers were produced by varying the heat-unit accumulation over a 200-d storage interval. Total yield increases of up to 90% and substantial improvements in tuber grade were achieved by planting aged (600–900 degree-day (dd)) seed-tubers. Plant growth from aged Russet Burbank seed-tubers was modelled to identify the mechanisms by which yield and quality were altered. Growth analysis demonstrated that the age-induced yield increases were due to faster emergence, faster leaf-area establishment, and tuberization earlier in the growing season compared with that from younger seed-tubers. The annual life cycle was thus accelerated, allowing plants from older seed-tubers to utilize the short (120-d) growing season more efficiently than those from younger seed-tubers. This was reflected in a higher harvest index: plants from 739 dd seed-tubers partitioned 63% of their total fresh weight into tubers compared with 48% for those from 66 dd seed-tubers (based on the quadratic model describing the relationship between seed-tuber age and and harvest index at 121 d after planting). The technique appears to be very promising for enhancing yield and/or promoting ’earliness’ of potatoes in regions with short growing seasons.Key words: Solanum tuberosum, seed-tuber age, plant growth, yield

scholarly journals Morphological characteristics of local populations of European vendace Coregonus albula (L.) in some lakes of Latvia during 50 years

2009 ◽  
Vol 63 (6) ◽  
pp. 271-278 ◽  
Author(s):  
Jeļena Oreha ◽  
Nataļja Škute
Keyword(s):  
Cluster Analysis ◽  
Statistical Analysis ◽  
Morphological Characteristics ◽  
Specific Form ◽  
Living Conditions ◽  
Local Conditions ◽  
Coregonus Albula ◽  
Local Populations ◽  
History Of

Morphological characteristics of local populations of European vendace Coregonus albula (L.) in some lakes of Latvia during 50 years The vendace (Coregonus albula (L.)) is a widespread fish in the waters of the Holarctic and has been much studied in regard to history of spread and evolution. Statistical analysis of morphometric and meristic changes in Coregonus albula in some Latvian lakes for the last 50 years was conducted. Cluster analysis of meristic parameters showed that the vendace populations of lakes Stirnu - Alūksnes have become closer in meristic properties while the vendace populations of lakes Drīdzis - Sventes have become more dissimilar. The diversity and variation of morphological characteristics of vendace in the studied lakes are within the range of variations of the European vendace (Coregonus albula), although due to its flexibility it makes a lake-specific form depending on the local conditions of each reservoir. The discovered differences in the vendace populations from Lakes Nirzas, Rāznas, Stirnu, Alūksnes, Drīdzis, and Sventes seem to have resulted solely from/due to the adaptation of vendace to living conditions, which has changed during the previous 50 years.

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