The effect of seed tuber weight on characters in the first and the second clonal generation of potato populations

Euphytica ◽  
1986 ◽  
Vol 35 (2) ◽  
pp. 465-482 ◽  
Author(s):  
B. Maris
Keyword(s):  
Seed Tuber ◽  
Tuber Weight ◽  
Clonal Generation ◽  
Seed Tuber Weight

FACTORS INFLUENCING THE AGRONOMIC PERFORMANCE OF THE ADAPTED YAM MINISETT TECHNIQUE IN NIGERIA – PLANTING DATE AND GENDER OF THE FARMER

2016 ◽  
Vol 54 (1) ◽  
pp. 1-15 ◽  
Author(s):  
STEPHEN MORSE ◽  
NORA McNAMARA
Keyword(s):  
Seed Tuber ◽  
Planting Date ◽  
Agronomic Performance ◽  
Tuber Weight ◽  
Male And Female ◽  
Varietal Differences ◽  
Factors Influencing ◽  
And Gender ◽  
First Time ◽  
Seed Tuber Weight

SUMMARYThis paper describes the results of 3 year's data from farmers using the Adaptive Yam Minisett Technique (AYMT) to produce seed yams in Nigeria. A total of 30 sites were established each year between 2013 and 2015 in the Idah area (Kogi State) of Nigeria and 58 plots in the Amoke area (Benue State) in 2015. Each site had yam setts (80 to 100 g) untreated and treated with a pesticide ‘dip’ prior to planting and farmers (male and female) were free to select the variety and manage the sites as they wished. In line with previous research, the results suggest that treatment does increase the weight of tubers produced by a sett but not necessarily the number of tubers. Varietal differences were also observed. For the first time, the results suggest that the time of planting does have a significant impact on seed tuber weight, with later planting leading to small tubers. Also, the gender of the farmer had an impact on some of the agronomic variables, with male owners of the site generally producing more and larger tubers per sett planted and sprouted than female owners. Various mechanisms for the latter are discussed in the paper.

The determination and economic analysis of relationships between plant population and yield of main crop potatoes

1968 ◽  
Vol 70 (2) ◽  
pp. 123-129 ◽  
Author(s):  
P. R. Sharpe ◽  
J. B. Dent
Keyword(s):  
Seed Tuber ◽  
Square Root ◽  
Tuber Weight ◽  
Stem Number ◽  
Plant Populations ◽  
Functional Relationships ◽  
Root Functions ◽  
Main Crop ◽  
The Relationship ◽  
Seed Tuber Weight

SUMMARYTwo experiments designed to provide data for the estimation of functional relationships, which may be used to determine economically optimum plant populations and planting patterns in Desire'e potatoes, are described. Functional relationships between the number of main stems per acre and yield per acre were estimated from the results of experiment (i). Experiment (ii) investigated the relationship between stem number per tuber and seed tuber weight. ‘Square root’ functions estimated for seed yield and ware yield from the results of Exp. (i) were used to calculate a total Financial Returns curve. This returns curve, together with the Cobb-Douglas function estimated from the results of Exp. (ii), was used to calculate the stem numbers per acre, which would give maximum returns per acre and economically optimum returns in different cost/price situations.

An approach to determining optimum tuber planting densities in early potato varieties

1993 ◽  
Vol 120 (1) ◽  
pp. 63-70 ◽  
Author(s):  
D. C. E. Wurr ◽  
J. R. Fellows ◽  
E. J. Allen
Keyword(s):  
Seed Tuber ◽  
The Other ◽  
Row Spacing ◽  
Tuber Weight ◽  
Early Potato ◽  
Potato Varieties ◽  
Optimum Density ◽  
Early Production ◽  
Seed Tuber Weight

SUMMARYThirteen experiments conducted near Tenby, Dyfed, between 1973 and 1980, examined the effects of seed-tuber weight and within-row spacing on tuber yields of seven potato varieties grown for early production. These data have been used in an attempt to develop an approach to the determination of optimum tuber planting densities in early crops which will provide agronomists with logically applicable principles. Tuber planting densities, which maximized the net crop return (ware value minus seed cost), were estimated for eight ratios of seed cost to ware value ranging from 0·25 to 8·0. Optimum tuber planting densities decreased with the use of higher ratios of seed cost: ware value and heavier seed, except for ratios of 0·25 and 0·50 applied to yields of tubers > 25 mm harvested in June. In general, later harvesting together with the use of larger riddle sizes give a lower optimum density with ratios < 2·2·0. Optimum densities for Red Craigs Royal, Ulster Sceptre and Vanessa were higher than for the other varieties.The results provide an illustration of how to approach the problem of selecting tuber planting densities in order to maximize net crop returns in early potato varieties.

Determination of optimum tuber planting density for production of tubers in processing ware grades in the potato variety Record

1990 ◽  
Vol 114 (1) ◽  
pp. 11-18 ◽  
Author(s):  
D. C. E. Wurr ◽  
J. R. Fellows ◽  
R. A. Sutherland ◽  
E. J. Allen
Keyword(s):  
Seed Tuber ◽  
Planting Density ◽  
Potato Tubers ◽  
New Approach ◽  
Seed Tubers ◽  
Series Of Experiments ◽  
Number Of Stems ◽  
The Uk ◽  
Seed Tuber Weight

SUMMARYA series of experiments examining the influences of size and spacing of planted potato tubers (‘seed’ tubers) on tuber yields was conducted at four sites in the UK in 1982–84. A new approach to data analysis was used to estimate the optimum tuber planting density for different ware grades. The optimum density, which maximized returns, decreased with increasing seed tuber weight and ratio of seed-tuber cost to ware value and with lower than average total tuber yields. Changing the required ware grade from 40–65 mm to 40–80 mm had a minimal effect on the optimum tuber planting density.Optimum tuber planting densities were lower than in published recommendations but this disparity appeared to be accounted for by differences in the number of stems produced by each planted tuber. There was some evidence that, with lower seed-tuber weights, the optimum planting density differed with site and that at optimum economic densities small and medium seed tubers outyielded large seed tubers.

scholarly journals Effects of Seed Tuber Size and Planting Density on the Tuber Number and the Individual Tuber Weight of Plants Grown from Potato Microtubers in Fields

2011 ◽  
Vol 80 (3) ◽  
pp. 292-301
Author(s):  
Shogo Tsuda ◽  
Motoyuki Mori ◽  
Akira Kobayashi ◽  
Akiko Takada ◽  
Norikazu Takada ◽  
...  
Keyword(s):  
Seed Tuber ◽  
Tuber Size ◽  
Planting Density ◽  
Tuber Number ◽  
Tuber Weight ◽  
The Individual ◽  
Individual Tuber

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.

Effect of seed tuber size on first clonal generation yield of potatoes

1966 ◽  
Vol 43 (11) ◽  
pp. 418-423 ◽  
Author(s):  
R. Mullin ◽  
A. W. Blomquist ◽  
F. I. Lauer
Keyword(s):  
Seed Tuber ◽  
Tuber Size ◽  
Clonal Generation

scholarly journals PENINGKATAN PERTUMBUHAN DAN HASIL BAWANG MERAH (Allium ascalonicum, L) DENGAN APLIKASI PERBEDAAN KONSENTRASI BIO SLURRY DAN PEMOTONGAN UMBI BIBIT

2021 ◽  
Vol 10 (1) ◽  
pp. 40-49
Author(s):  
Pramono Hadi Hadi
Keyword(s):  
Sea Level ◽  
Plant Height ◽  
Seed Tuber ◽  
Block Design ◽  
Growth And Yield ◽  
Tuber Weight ◽  
Plant Weight ◽  
Factorial Method ◽  
Seed Tubers ◽  
Randomized Block Design

ABSTRACT            This study aims to determine the effect of bio slurry and cutting of seed tubers on the growth and yield of shallot plants in the Dukuh Kepoh Food and Horticultural Garden, Tohudan Village, Colomadu District, Karanganyar Regency with a height of ± 105 m above sea level, from April until June 2020.          This study used a factorial method with a complete randomized block design (RAKL), consisting of two treatment factors, while the two treatment factors with 12 treatment combinations, each treatment was repeated (3) times. The first treatment, the concentration of bio slurry (S) which consists of 4 levels, namely (S1: Bio slurry 0 ml / l, S2: Bio slurry 50 ml / l, S3: Bio slurry 100 ml / l, S4: Bio slurry 150 ml / l). The second treatment was cutting the seed tubers (P), which consisted of three levels (P1: Cutting 1/4 part of seed tubers, P2: Cutting 1/3 parts of seed tubers, P3: Cutting 1/2 parts of seed tubers).         The results showed that the treatment with bio slurry (S) had no significant effect on all observed parameters. Treatment by cutting seed tubers (P) had a very significant effect on plant height, weight of fresh tubers per plant, weight of fresh tubers per plot and had a significant effect on the number of fresh tubers per plant, but had no significant effect on the number of tubers per plot and weight of fresh stems. The combination between the treatment of bio slurry and cutting of seed tubers (SxP) did not significantly affect all observed parameters, The highest yield of fresh tubers per plot was obtained in treatment (S2P2) with a yield of 800.00 g, while the lowest tuber weight per plot was obtained in treatment ( S1P3) with a yield of 433.33 g.   Keywords: shallot, bio-slurry, seed tuber cutting    

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