Effect of mother plant-applied nitrogen and potassium on seed weight and seedling emergence of true potato seed

2000 ◽  
Vol 8 (4) ◽  
Author(s):  
C. R. Kanzikwera ◽  
D. S.O. Osiru ◽  
J. S. Tenywa ◽  
E. Adipala ◽  
A. S. Bhagsari
1987 ◽  
Vol 64 (9) ◽  
pp. 483-491 ◽  
Author(s):  
N. Pallais ◽  
S. Villagarcia ◽  
N. Fong ◽  
J. Tapia ◽  
R. Garcia

1986 ◽  
Vol 64 (2) ◽  
pp. 336-340 ◽  
Author(s):  
M. E. Grasmick ◽  
S. A. Slack

The effect of potato spindle tuber viroid infection on pollen viability, fruit-set, botanical seed set, seed weight, and seed germination in potatoes was determined. Pollen collected from the infected cultivar 'Monona' was less viable than pollen collected from healthy plants. Pollen collected from infected plants reduced seed set significantly but did not reduce fruit development or seed set in all cultivars tested. For some cultivars, infected maternal plants increased the frequency of fruit development and seed weight compared with healthy controls. True potato seed from viroid-infected 'Katahdin' × 'Superior' crosses germinated at a higher rate than did seed from comparable uninfected parents. Progeny from viroid-infected parents that exhibited potato spindle tuber viroidlike symptoms did not always test positive for potato spindle tuber viroid by bioassay or polyacrylamide gel electrophoresis tests. Efficiency of potato spindle tuber viroid detection by bioassay was highest for seedlings 2 weeks after imbibition. Potato spindle tuber viroid was detected in 100% of the progeny tested after true potato seed was stored at 4 °C for 12 years. Tests on selfed true potato seed from the viroid-infected cultivar 'Monona' demonstrated a transmission rate of 100% after subinoculation of initial bioassay plants.


1992 ◽  
Vol 28 (1) ◽  
pp. 31-39 ◽  
Author(s):  
N. Gunadi ◽  
M. J. Potts ◽  
R. Sinung-Basuki ◽  
Greta A. Watson

SummaryThree seasons of on-farm experimentation to develop potato production from botanical or true potato seed (TPS) under cool fertile conditions in West Java, Indonesia, are described. Twenty-three farmers experimented with two production systems: use of transplants, and use of seedling tubers produced in nursery beds. There was little yield difference between the systems, but an apparent progeny × system × season interaction was observed. All progenies were more resistant to late blight than the present cultivars grown from tubers. Appropriate matching of progeny and system gave seed of comparable quality with, but total yields slightly less than, certified imported seed of cv. Granola. Ware quality was slightly better than that of cv. Granola. Production costs were markedly less than for a tuber crop, making TPS ideal for small, resource-poor farmers.


1989 ◽  
Vol 66 (2) ◽  
pp. 109-117 ◽  
Author(s):  
P. Vander Zaag ◽  
B. Susana ◽  
Z. Ganga ◽  
S. Gayao

2016 ◽  
Vol 6 (1) ◽  
pp. 39
Author(s):  
Y. Zubairu ◽  
J. A. Oladiran ◽  
O. A. Osunde ◽  
U. Ismaila

Study was conducted in 2006 and 2007 cropping seasons at the experimental field of Federal University of Technology, Minna (9o 401N and 6o 301E), in the Southern Guinea Savanna of Nigeria to determine the effects of N fertilizer and the fruit positions on fruit and seed yield of okro. The treatment comprised factorial combination of five nitrogen levels (0, 30, 60, 90 and 120 kg/ha) and five fruit positions on a mother-plant (3, 5, 7, 9 and 10) which were replicated three times and laid in a Randomized Complete Block Design (RCBD). The results indicated that significant taller plants were recorded in the plots that received 120 kg N/ha while shorter plants were recorded in plots that received 0 N/ha in both years of the study. The higher N level of 120 kg/ha and lower fruit position of 3 significantly gave higher number of fruit yield while the yield decreased with decrease in N level and increase in fruit position on the mother-plant. Similarly, heavier fruits were recorded in lower fruit positions and higher N levels. The fruits formed at the lower position 3 and 5 produced more seeds with higher seed weight than those formed at the higher positions. The results also showed that significantly higher seed yield was recorded at N level of 120 kg/ha ?.


2016 ◽  
Vol 36 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Alexios A. Alexopoulos ◽  
Ioannis C. Karapanos ◽  
Konstantinos A. Akoumianakis ◽  
Harold C. Passam

2015 ◽  
Vol 29 ◽  
pp. 166-167 ◽  
Author(s):  
T. Karanisa ◽  
K. Akoumianakis ◽  
A. Alexopoulos ◽  
I. Karapanos

2010 ◽  
Vol 5 (1) ◽  
pp. 35 ◽  
Author(s):  
Debashish Sen ◽  
Amitava Rakshit ◽  
Narayan Chandra Sarkar ◽  
Dulal Chandra Ghosh ◽  
Subir Kumar Bardhan Roy
Keyword(s):  

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