scholarly journals Effect of nitrogen fertilization and microbial preparations on potato yielding

2014 ◽  
Vol 60 (No. 8) ◽  
pp. 379-386 ◽  
Author(s):  
M. Kołodziejczyk
Keyword(s):  
Nitrogen Fertilization ◽  
Yield Components ◽  
Field Experiments ◽  
Tuber Yield ◽  
Coefficient Of Determination ◽  
Soil Conditions ◽  
Control Analysis ◽  
Tuber Weight ◽  
Marketable Yield ◽  
Average Tuber Weight

The effect of nitrogen fertilization and microbial preparations on yielding and development of potato tuber yield components were assessed in field experiments conducted under soil conditions of Luvic Chernozem. The factors of the experiment were nitrogen fertilization levels: 0, 60, 120 and 180 kg N/ha and the following preparations: BactoFil B10, effective microorganisms and UG<sub>max</sub> soil fertilizer. Nitrogen fertilization caused a significant increase in marketable yield of potato tubers. Yield increments on individual fertilizer treatments ranged from 66% to 140%. An evident effect of this factor was also visible regarding the yield components values. Increase in the number of main stems per 1 m<sup>2</sup> under the influence of growing nitrogen doses occurred from the fertilization level 120 kg N/ha, whereas the number of tubers per 1 stem increased only to the level of 60 kg N/ha. Each nitrogen dose applied within the range to 180 kg N/ha caused a marked increase in an average tuber weight. Conducted investigations demonstrated an unfavourable effect of microbial preparations on the marketable crop yield of tubers and formation of yield components. On the objects where microbial preparations were applied, the marketable yield was lower by 1.5 to 2.3 t/ha than in the control. Analysis of linear regression revealed occurrence of significant dependencies between the total tuber yield and the values of individual yield components. The relationships were the most visible for an average tuber weight formation as evidenced by the value of coefficient of determination&nbsp;(R<sup>2</sup> = 0.983).

scholarly journals Correlation coefficients, path analysis and disease reaction between yield and yield components in Potato (Solanum tuberosum L.) genotypes in Bale, South Eastern Ethiopia

2016 ◽  
Vol 3 (3) ◽  
pp. 293
Author(s):  
Getachew Workalemahu ◽  
Wassu Mohammed
Keyword(s):  
Path Analysis ◽  
Indirect Effects ◽  
Yield Components ◽  
Tuber Yield ◽  
Phenotypic Correlation ◽  
Tuber Weight ◽  
Direct And Indirect Effects ◽  
Marketable Tuber ◽  
Positive Direct ◽  
Average Tuber Weight

Study on the relationships between yield and its components will improve the efficiency of breeding programmes by determining appropriate selection criteria. An investigation was carried out on 24 potato genotypes to find out the association among yield, yield components and their direct and indirect effects on tuber yield of potato. The experiment was laid out in randomized complete block design with three replications at Sinana Agricultural Research Center. The association was analyzed by correlation coefficient, and further subjected to path analysis to estimate direct and indirect effects of each character on tuber yield. Positive and significant genotypic and phenotypic correlation were found between total tuber yield and marketable tuber yield (rg=0.99), leaf area index (rg=0.82), plant height(rg=0.56), stem number per plant(rg=0.56), average tuber weight (rg=0.74)  and biomass yield (rg=0.69). Path analysis of tuber yield and its components shows that marketable tuber yield and average tuber weight had maximum positive direct genotypic and phenotypic effect on total tuber yield indicating their importance in selection for tuber yield improvement.

Studies on character association in potatoes

1978 ◽  
Vol 90 (1) ◽  
pp. 215-219 ◽  
Author(s):  
P. C. Gaur ◽  
H. Kishore ◽  
P. K. Gupta
Keyword(s):  
Yield Components ◽  
Dry Matter ◽  
Tuber Yield ◽  
Positive Association ◽  
Tuber Quality ◽  
Tuber Weight ◽  
Significant Positive Association ◽  
Tuber Dry Matter ◽  
Selection For ◽  
Average Tuber Weight

SUMMARYThe phenotypic, genotypic and environmental correlation coefficients were calculated for 13 morphological and tuber quality characters, 17 of 78 possible combinations were found to be significant. Tuber yield was positively associated with average tuber weight and with total tuber dry matter per plant. Average tuber weight was negatively associated with number of tubers per plant and with most of the quality characters. The indices for selection for tuber yield were computed using the yield components and yield only. It was observed that the selections based on tuber yield itself are likely to be superior to those based on yield components. However, an index involving the yield components and the yield was found to be most efficient.Among the tuber quality characters, percentage tuber dry matter showed significant positive association with the percentage alcohol-insoluble solids (AIS) and with the percentage of starch in fresh tubers, and a negative association with the percentage of protein in tuber dry matter. The associations between percentage of starch in fresh tubers and the percentage of starch in tuber dry matter, between percentage of starch in AIS and the percentage of starch in tuber dry matter and between percentage of protein in fresh tubers and the percentage of protein in tuber dry matter were also found to be significant and positive.To increase tuber yield it is necessary to break the negative linkage between its two components. High total tuber dry matter per plant can be brought about by selecting for high tuber yield. For the improvement of tuber quality together with tuber yield, the selection for yield based on a large number of tubers is likely to be useful.

Effects of breaking seed tubers on yield components of the tuber crop Plectranthus edulis

2012 ◽  
Vol 151 (3) ◽  
pp. 368-380 ◽  
Author(s):  
MULUGETA TAYE ◽  
W. J. M. LOMMEN ◽  
P. C. STRUIK
Keyword(s):  
Yield Components ◽  
Field Experiments ◽  
Tuber Yield ◽  
Seed Tuber ◽  
Tuber Weight ◽  
Seed Tubers ◽  
Physiological Information ◽  
Tuber Crop ◽  
The Mean ◽  
Experimental Treatments

SUMMARYPlectranthus edulis is an ancient tuber crop, cultivated in Ethiopia, which produces stem tubers on stolons below the ground; however, agronomic and physiological information on this crop is scarce. Three field experiments were carried out at each of two locations (Awassa and Wondogenet, Ethiopia). Expt 1 dealt with the effects of breaking a seed tuber into different numbers of seed pieces before planting, Expt 2 assessed the effect of the weight of the seed tuber piece and Expt 3 investigated the effect of planting different numbers of seed pieces per planting hole. Cultivar Lofuwa was planted in Awassa, whereas cvar Chankua was planted in Wondogenet. Breaking seed tubers in Expt 1 resulted in more main stems/hill, more tubers and smaller individual tubers. In Wondogenet, the tuber yield also increased. Breaking did not affect the number of stolons/m2. Expt 2 indicated that when only one seed piece was planted per planting hole, smaller seed pieces gave fewer stems, fewer stolons and fewer tubers/m2, smaller tubers and lower tuber yields. Expt 3 showed that planting more seed pieces/planting hole gave more stems, more stolons and more tubers/m2, thus increasing tuber fresh yield/m2, whereas the mean tuber weight was not consistently affected. Across all experiments, the tuber yield increased when the number of main stems increased up to three main stems/m2. Higher tuber yields resulting from experimental treatments were either achieved by an effect on number of tubers alone or by combined effects on number of tubers and mean tuber weight, but not by an effect on mean tuber weight alone. The number of small tubers was high in all experiments. Breaking a seed tuber into two or three pieces before planting them in one planting hole consistently resulted in increased numbers of main stems and tuber yield.

scholarly journals Genotypic selection of advanced potato clones by REML/BLUP

2018 ◽  
Vol 36 (2) ◽  
pp. 265-270
Author(s):  
Giovani O Silva ◽  
Arione S Pereira ◽  
Fernanda Q Azevedo ◽  
Agnaldo DF Carvalho
Keyword(s):  
Yield Components ◽  
Tuber Yield ◽  
Block Design ◽  
Yield Traits ◽  
Tuber Weight ◽  
Randomized Complete Block Design ◽  
Commercial Cultivars ◽  
Average Tuber Weight ◽  
New Cultivars ◽  
Selection Of

ABSTRACT Potato genotypes were evaluated in their performance, according to the genotype values for tuber yield traits. The experiments were carried out in Canoinhas and Pelotas, Brazil, in spring 2014. Eleven advanced clones and two commercial cultivars (Agata and Asterix) (check cultivars) were evaluated. A randomized complete block design with four replicates was used. Plots were harvested 110 days after planting, and evaluated for tuber yield components. The data were submitted to joint deviance analyzes using the REML/BLUP method. Clones F102-22-07 and F32-02-06 stood out positively for tuber yield. F102-22-07 showed high marketable tuber yield and average tuber weight, while clone F32-02-06 exhibited high marketable and total tuber yield. The superiority of these advanced clones in relation to the check cultivars, suggests their potential to be evaluated in other environments, aiming their release as new cultivars.

Yield and Yield Components of Six Sweet Potato (Ipomoea batatas) Cultivars I. Contribution of Yield Components to Tuber Yield

1975 ◽  
Vol 11 (1) ◽  
pp. 39-48 ◽  
Author(s):  
S. B. Lowe ◽  
L. A. Wilson
Keyword(s):  
Sweet Potato ◽  
Yield Components ◽  
Ipomoea Batatas ◽  
Tuber Yield ◽  
Total Yield ◽  
Tuber Number ◽  
Tuber Weight ◽  
Marketable Yield ◽  
Yield And Yield Components ◽  
Positive Correlations

SUMMARYTotal yield and yield components (tuber numbers and mean tuber weights) of six local sweet potato cultivars were compared in wet and dry season crops. There were significant negative correlations between tuber number and mean tuber weight in five of the six cultivars, and positive correlations between these yield components and total yield, suggesting that cultivars may be grouped into ‘tuber number-tuber weight’ and ‘tuber weight’ types, as well as a ‘random type’ in which yield is related to neither component. Marketable yield tended to be directly related to both components, and cultivars with lower tuber numbers usually produced a higher percentage of marketable yields. The significance of these findings for sweet potato yield improvement is discussed.

scholarly journals Assessment of metribuzin effects on potatoes using a method of very rapid fluorescence induction

2011 ◽  
Vol 48 (No. 3) ◽  
pp. 107-117
Author(s):  
J. Dvořák ◽  
I. Remešová
Keyword(s):  
Aboveground Biomass ◽  
Field Experiments ◽  
Tuber Yield ◽  
Fluorescence Induction ◽  
Growth Chamber ◽  
Tuber Weight ◽  
Ambient Conditions ◽  
Rapid Induction ◽  
Pot Experiments ◽  
Stable Conditions

Effects of increasing doses of the herbicidal preparation Sencor 70 WP (metribuzin a.i.) on selected potato varieties were studied in a&nbsp;field and pot experiments using very rapid fluorescence induction (vrFI). Tuber yield, and in pot experiments a&nbsp;tuber number and characteristics of the aboveground biomass were assessed. The curve of rapid induction goes through the O-J-I-P phases. The parameters Fo, Fv/Fp and rFj were measured. Based on changes in the vrFI parameters in comparison with controls, varieties were ranked according to sensitivity to metribuzin in field experiments. Keřkovsk&eacute; rohl&iacute;čky and Ukama were the most sensitive varieties and Impala the least sensitive variety. In pot experiments in the growth chamber, significant decrease in tuber weight vs controls was found in sensitive varieties Keřkovsk&eacute; rohl&iacute;čky (in 1998, 0.75 kg.ha<sup>&ndash;1</sup> Sencor 70 WP decreased tuber weight by 28% and 1.5 kg.ha<sup>&ndash;1</sup> by 89%) and Ukama (in 1997, at 1.5 kg.ha<sup>&ndash;1</sup> by 35%). Under stable conditions in the growth chamber, there were lower differences in the rFj parameter in these varieties in comparison with controls than in resistant ones. Based on this finding it can be assumed that the sensitivity of varieties can be determined according to rFj changes under stable ambient conditions.

Investigations on Nigerian root and tuber crops. Influence of nitrogen fertilization on the yield and chemical composition of two cassava cultivars (Manihot esculenta)

1976 ◽  
Vol 86 (2) ◽  
pp. 401-406 ◽  
Author(s):  
G. O. Obigbesan ◽  
A. A. A. Fayemi
Keyword(s):  
Nitrogen Fertilization ◽  
Manihot Esculenta ◽  
Yield Components ◽  
Field Experiments ◽  
N Fertilization ◽  
Yield Performance ◽  
Local Cultivar ◽  
Improved Cultivars ◽  
Starch Yield ◽  
Tuber Crops

SummaryThe results of field experiments on the influence of nitrogen fertilization on the yield components, starch and prussic acid content of two of the cassava cultivars recommended for cultivation in Nigeria are presented. The two cultivars 53101 (local) and 60506 (improved) were harvested at 9, 12 and 15 months. In general, the improved cultivars appeared to respond better to N fertilization, but high rates of N (150 kg N/ha) tended to reduce the yield performance of the two cultivars. The local cultivar produced maximum yields of 31·5, 37·5 and 55·7 fresh tuber t/ha with 60 kg N/ha at 9, 12 and 15 months, respectively, while the improved cultivar gave maximum yields of 31·5 and 48·4 t/ha with 120 kg N/ha at 9 and 12 months, respectively, and 64·1 t/ha with 90 kg N/ha at 15 months. By allowing the crop to grow up to 15 months, the starch yield was more than doubled and about three times the yield obtained at 9 months. The 53101 strain seemed to produce maximum starch yields with 60 kg N/ha while the 60506 type tended to give maximum starch yields with 90 kg N/ha. Influence of N treatments was significant up to 12 months of age but not at 15 months.The HCN content of both cultivars diminished considerably with the age of the plant, dropping at 15 months to about half the level at 9 months. While the HCN concentration of the local cultivar tended to increase with higher N-fertilization, that of the improved cultivar diminished, particularly at 12 months after planting. At 15 months however, the HCN content of both cultivars rose with increasing N. fertilization.

scholarly journals Yield, frying quality, plant vigor, and maturity of potato clones

2019 ◽  
Vol 37 (1) ◽  
pp. 95-100 ◽  
Author(s):  
Giovani Olegario da Silva ◽  
Arione da S Pereira ◽  
Agnaldo DF Carvalho ◽  
Fernanda Q Azevedo
Keyword(s):  
Tuber Yield ◽  
Block Design ◽  
Environment Interaction ◽  
Tuber Weight ◽  
Higher Plant ◽  
Plant Vigor ◽  
Type Iv ◽  
Randomized Complete Block Design ◽  
Late Maturity ◽  
Average Tuber Weight

ABSTRACT The objective of this research was to evaluate advanced potato clones for tuber yield, frying quality, plant vigor, and maturity, grown from minituber seeds, and to assess correlations between these traits. Eight advanced potato clones of Embrapa Potato Breeding Program (F11-09-03, F05-11-03, F54-11-06, F141-11-01, C2718-12-09, C2718-24-09, C2743-09-09, and CL308) and three commercial cultivars (Agata, Asterix and BRSIPR Bel) were evaluated. Experiments were carried out in autumn 2017, in Canoinhas-SC and Pelotas-RS. A randomized complete block design with four replicates was used. We used tuber seeds type IV (minibubers). We evaluated plant vigor, maturity, yield and number of marketable tubers, yield and number of total tubers, average tuber weight, specific gravity, and frying color. Individual and joint variance analyses revealed significant differences (p <0.05) among genotypes for all traits at both locations. The GxE (genotype x environment) interaction was significant for all traits. For the two locations together, clones F05-11-03, C2718-12-09, C2718-24-09 and the control cultivar BRSIPR Bel showed higher marketable tuber yields. The first two clones also showed tubers with high average tuber weight. Clone F54-11-06 showed the later maturity at both locations. Regarding the frying quality characteristics, only clone F141-11-01 showed a pattern comparable to that of the control cultivar Asterix. Also, clones with higher plant vigor had higher tuber yield, but late maturity. Frying quality traits were not correlated between them and among other traits.

The association between potato tuber yield and the components of yield in irrigated and dryland environments in the prairies

1991 ◽  
Vol 71 (1) ◽  
pp. 279-287 ◽  
Author(s):  
D. R. Lynch ◽  
G. C. Kozub
Keyword(s):  
Potato Breeding ◽  
Tuber Yield ◽  
Correlation Coefficients ◽  
Yield Component ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Marketable Yield ◽  
Yield Structure ◽  
Selection For ◽  
Average Tuber Weight

A study of the yield structure of nine potato genotypes was carried out over a 3-yr period in irrigated and dryland environments in the Prairies. This was undertaken to develop an understanding of yield component interactions, which could be useful in the selection for yield in early clonal generations of the Prairie Potato Breeding Project. Path coefficient analysis was used to partition correlation coefficients among yield and yield components into direct and indirect effects. Marketable yield of tubers in the irrigated and dryland environments differed markedly as did interactions between components in determining yield. Mainstem and tuber number were associated positively with yield under irrigated but not under dryland conditions. Tuber yield was strongly associated with average tuber weight under both irrigated and dryland conditions. The study indicates that consideration of yield component interactions in early generation selection "activities" could assist in the identification of high-yielding genotypes. Key words: Path coefficient analysis, Solanum tuberosum, selection, early clonal generations

scholarly journals Parental Value for Tuber Yield in Potato Under High Temperature Environments in Climate Change Conditions

2019 ◽  
Vol 4 (1) ◽  
pp. 630-640
Author(s):  
Gastelo Manuel ◽  
Luis Diaz ◽  
Katherine Quispe ◽  
Merideth Bonierbale
Keyword(s):  
Climate Change ◽  
Late Blight ◽  
High Temperatures ◽  
Tuber Yield ◽  
Total Yield ◽  
Climate Change Scenarios ◽  
Tuber Weight ◽  
Early Maturity ◽  
Breeding Programs ◽  
Average Tuber Weight

AbstractPotato crop is expanding to areas with temperatures higher than those required. Climate change is increasing temperatures in traditional areas of potato production, thereby affecting tuber yield. The International Potato Center has developed a population adapted to these new conditions, being more tolerant to high temperatures, resistant to late blight, virus PVX and/or PVY and early maturity. In breeding programs it is very important to know the parental value of the progenitors. The parental value of 34 selected potato clones was determined through general combining ability for marketable, total yield and average tuber weight under high temperatures. Using the line by tester mating design, the potato clones were crossed as lines and varieties Katahdin, Huagalina and clones CIP398098.204 and CIP302533.31 as testers. The field experiments were carried out in three locations in Peru: San Ramon, La Molina and Majes, where average temperatures at night were between 15.25 to 21.65°C, and during the day fluctuated between 21.47 to 27.20°C. We used a randomized complete block design, with three replications. At harvest the number and weight of marketable and non-marketable tubers were taken. Then the average tuber weight, marketable and total yield per hectare was calculated. 18 potato clones were identified with high parental value for marketable yield, seventeen for total tuber yield and 11 for average tuber weight; nine of them combine high parental value for the three characteristics studied. These clones with late blight resistance, heat tolerant, adapted to medium altitudes, growing period of 90 days and high parental value can be used as parents in breeding programs, to obtain new varieties under the new climate change scenarios with high temperatures. 12 crosses that presented high SCA are the most promising for the development of superior clones.

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