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Genotype by Environment Interaction and Yield Stability of Potato Cultivars under Tropical Conditions

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Title Genotype by Environment Interaction and Yield Stability of Potato Cultivars under Tropical Conditions
Not Available
 
Creator Raja, S.
Verma, M. R.
Sathpathy, P. C.
Yadav, L. M.
Kumar, R.
Ullah, Z.
Khaiwal, R.
Dubey, R. K.
Kumar, S.
Singh, D.
Deshmukh, M. R.
Verma D.
Govindakrishnan P. M.
 
Subject G×E interaction
Indian potato cultivars
Marketable yield
 
Description Not Available
Potato (Solanum tuberosum ssp. tuberosum) cultivars grown under tropical conditions
exhibit comparatively poor yields compared to the temperate conditions, hence, there is need
for stable cultivars with greater yields. The interactions of four cultivars with ten
environments for 2 years under All India Coordinated Research Project (Potato) across the
country for 2 harvesting stage (75 and 90 DAP) revealed that the cultivars were significantly
different among themselves for Total Yield (TY) and Marketable Yield (MY) harvested at 75
and 90 DAP at seven and eight environments, respectively. The pooled analysis showed a
significant difference for cultivar and environmental main effects for all traits, indicating the
existence of cultivars genetic variability justified from the heterogeneity of environments. The
significant effect of G×E interaction for TY and MY at 90 DAP, and a non significance for the
same traits at 75 DAP clearly indicated that the prevailing environments during early crop
stage were uniform as compared to its later harvesting stage. Partitioning of G×E interaction
into linear and non linear components were highly significant for all traits, strongly suggesting
the real differences in cultivars for regression over environmental means and the response of
cultivars to environment was controlled genetically. The cultivar K. Pukhraj was proven as
early bulking and stable cultivar for TY and MY at 75 DAP and predictable in nature, as
against K. Khyati which was stable cultivar for TY and MY at 90 DAP across growing
environments. Hence, K. Khyati, which recorded the highest TY (27.45 t ha-1) and MY (25.24 t
ha-1) for harvesting at 75 DAP, and TY (31.28 t ha-1) and MY (28.19 t ha-1) at 90 DAP, can be
recommended for tropical conditions.
Not Available
 
Date 2019-07-24T05:58:27Z
2019-07-24T05:58:27Z
2018-09-01
 
Type Journal
 
Identifier Raja, S., Verma, M. R., Sathpathy, P. C., Yadav, L. M., Kumar, R., Ullah, Z., Khaiwal, R., Dubey, R. K., Kumar, S. Singh, D., Deshmukh, M. R. Verma D. and Govindakrishnan P. M. .(2018). Genotype by Environment Interaction and Yield Stability of Potato Cultivars under Tropical Conditions. Journal of Agricultural Science and Technology, 20: 583-595
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http://krishi.icar.gov.in/jspui/handle/123456789/21684
 
Language English
 
Relation Not Available;
 
Publisher Not Available