Abstract:
The experiment was conducted at Laboratory of Department of Agronomy,
Sher-e-Bangla Agricultural University (SAU), Sher-e-Bangla Nagar, Dhaka-1207 during
March to August 2012 to study the influence of variety and date of harvesting on
post harvest physiology of potato derived from TPS at ambient storage condition.
The experiment consisted of 2 factors: Factor A: Potato variety (4 varieties) as-
V
1
: BARI TPS-1, V
2
: BARI TPS-2, V
3
: HPS-364/67 and V
: Lady Rosetta; Factor
B: Time of harvest (4 times) as- D
1
: 80 DAP, D
2
4
: 90 DAP, D
3
: 100 DAP and D
:
110 DAP. Potato variety and time of harvest had significant effect on all post
harvest physiological parameters and nutritional aspects. Dry matter content,
weight loss and percentage of rotten tubers increased with advancing storage
period irrespective of varieties. Among varieties BARI TPS-1 was superior to
those of others. All post harvest losses except apical sprout length decreased with
increasing the time of harvest. Specific gravity, reducing sugar, total sugar and
starch content increased with advancing storage period, whereas non-reducing
sugar decreased with increasing storage period. Among the varieties HPS 364/67
was the best in respect of nutritional aspects. Due to the interaction effect of
different variety and time of harvest at before storage and 20, 40, 60, 80, 100
DAS, the highest maximum dry matter in flesh (13.99, 17.75, 18.80, 19.93, 21.71
and 22.57%) was observed from V
1
D
4
and the lowest from V
1
D
. The highest
days required for starting of sprouting (51.67) was observed from V
,
while
the minimum from V
4
D
. At harvest and 100 DAS, the highest total sugar
(0.61% and 0.82%) was observed from V
1
4
D
4
, while
the lowest total sugar from
V
3
D
1
. The results revealed that BARI TPS-1 showed better storage quality.
Physiological performance compared to those of other varieties when harvested at
1
1
D
3
and V
1
D
4
4100 days after planting, while HPS 364/67 showed superior nutritional quality
than other varieties when harvested at the same days.
Description:
A Thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka
In partial fulfilment of the requirements
for the degree
of
MASTER OF SCIENCE (MS)
IN
AGRONOMY
SEMESTER: JANUARY-JUNE, 2013
