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Evaluation of Yield and Yield Contributing Characters of Heat Tolerant Potato (solanum Tuberosum L.) Genotypes in Bangladesh

M. H. Rahman
Agricultural Research Station, Bangladesh Agricultural Research Institute, Pahartali, Chittagong

M. M. Alam Patwary
Agricultural Research Station, Bangladesh Agricultural Research Institute, Pahartali, Chittagong

H. Barua
Agricultural Research Station, Bangladesh Agricultural Research Institute, Pahartali, Chittagong

M. Hossain
Bangladesh Agricultural Research Institute, Gazipur

S. Nahar
Agriculture Extension Officer, MetropolitanAgriculture office, Pachlaish, Chittagong, Bangladesh

Abstract/ Executive Summary:

Eight heat tolerant CIP (International Potato Centre) potato genotypes along with BARI (Bangladesh Agricultural Research Institute) Alu-7 (Diamant) and one local variety (Dohazari Sada) were evaluated at Agricultural Research Station, Pahartali, Chittagong during 2011-12 to identify heat tolerant genotypes from varieties and CIP clones of potato. Diamant and Dohazari Sada and all the heat tolerant CIP genotypes were found to grow well up to 60 DAP (days after planting) against heat having healthy plants and no senescence was noticed. After that 61-100% plants died due to high temperature (29.8^oC) depending on the genotypes. Genotype CIP 139 gave the highest yield (14.18 t/ha) and was comparatively less affected by heat than the other genotypes. The high dry matter (22.43 %) accumulated in the local variety Dohazari Sada.

Keywords: Potato, Heat tolerant,Yield, Germplasm

Location: Agricultural Research Station, Pahartali, Chittagong

Start Date: 00-00-2011

End Date: 00-00-2012

Program Area: Variety and Species

Commodity: Potato

Objectives:

To identify the potato genotypes suitable for cultivation under high temperature to mitigate the effect of climate change in Bangladesh.

Methodology:

Eight heat tolerant CIP genotypes viz., CIP 6, CIP 7, CIP 115, CIP 127, CIP 129, CIP 139, LB 12 and LB 14 along with BARI Alu-7 (Diamant) and one local variety (Dohazari Sada) having heat tolerance potentials were evaluated at the Agricultural Research Station, Pahartali, Chittagong during 2011-2012. The experiment was laid out in a randomized complete block design with three replications. The unit plot size was 3.0 m x 1.8 m. Fertilizers were applied @ 250-150-250-120 kg/ha of urea, TSP, MoP and Gypsum, respectively. Full amount of TSP, MoP and Gypsum and 50% of urea were applied as basal and the remaining amount of urea was side dressed at 35 DAP (days after planting). Tubers were planted on 02 January, 2012 with a spacing of 60 cm X 25 cm. Weeding, irrigation, earthing up and other intercultural operations were done as per recommendation developed by Tuber Crops Research Centre, BARI, Gazipur, Bangladesh. Botanical characters of the potato genotypes under investigation were recorded. Data on temperature, sunshine hour, rainfall and relative humidity during the study period were recorded. All data on yield and yield contributing characters were recorded. Data on sprouting percent, plant vigor, number of compound leaves, plant height (cm), number of stem per plant, foliage coverage percent, senescence, tuber number and weight per plot, tuber number and weight per plant, yield (t/ha) and dry matter were collected. Plant vigor data were also recorded on 1-5 scale where: vigor 1= very poor, 2= poor, 3= good, 4= very good and 5= excellent plant vigor and for senescence; 1= 0-20%; 2= 21-40%, 3= 41-60%, 4= 61-80% and 5= 81-100% dry plant foliage. Tubers were also graded as marketable (>20 g) and non marketable (<20 g) by weight basis. In case of local variety (Dohazari Sada) very small tuber (<5 g) was considered as non marketable tuber. Data were analyzed statistically and the means were separated by Least Significant Difference (LSD) following MSTATC software.

Source of Information: The Agriculturists 12(1): 50-55 (2014) ISSN 2304-7321 (Online), ISSN 1729-5211 (Print), A Scientific Journal of Krishi Foundation

Article Link (Online Journal): http://banglajol.info/index.php/AGRIC/article/view/19580/13541

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In Bangladesh, higher temperature decreases the yield of potato. However, among the genotypes studied, CIP 139 with yield of 14.18 t/ha was found to be promising against temperature up to 29.8^oC. Further investigation is needed with these genotypes for releasing as heat tolerant variety.

Knowledge Management: Journal