EVALUATION OF ADVANCED POTATO (SOLANUM TUBEROSUM L.) GENOTYPES FOR SALINITY TOLERANCE BASED ON YIELD AND AGRONOMIC TRAITS

Vikas Mangal; S K Sanwal; Ashwani Kumar; Devendra Kumar; Babita Chaudhary; SK Luthra; VK Gupta; Salej Sood; Vinod Kumar; Brajesh Singh

doi:10.56093/potatoj.v51i2.163873

Authors

Vikas Mangal ICAR-CPRI, Shimla https://orcid.org/0000-0001-9418-2340
S K Sanwal Division of Crop Improvement, ICAR-CSSRI, Karnal
Ashwani Kumar Division of Crop Improvement, ICAR-CSSRI, Karnal
Devendra Kumar ICAR-Central Potato Research Institute, Regional Station, Modipuram, Meerut
Babita Chaudhary ICAR-Central Potato Research Institute, Regional Station, Modipuram, Meerut
SK Luthra ICAR-Central Potato Research Institute, Regional Station, Modipuram, Meerut
VK Gupta ICAR-Central Potato Research Institute, Regional Station, Modipuram, Meerut
Salej Sood ICAR-Central Potato Research Institute (CPRI), Shimla
Vinod Kumar ICAR-Central Potato Research Institute (CPRI), Shimla
Brajesh Singh ICAR-Central Potato Research Institute (CPRI), Shimla

https://doi.org/10.56093/potatoj.v51i2.163873

Keywords:

Salinity, Marketable yield, stress susceptibility index, yield reduction

Abstract

Salinity stress is a major constraint on potato (Solanum tuberosum L.) production, particularly in salinity-prone
regions such as the Indo-Gangetic plains. This study evaluated 58 potato genotypes, including 54 advanced breeding lines
and 4 released varieties, under control (ECe < 1 dS/m) and saline (ECe ~ 6.8-7.05 dS/m) environments. Genotypes were
assessed for key agronomic traits, including marketable tuber yield (MTY), non-marketable tuber yield (NMTY), total
tuber yield (TTY), marketable and non-marketable tuber no. and dry matter content (DM%). Salinity stress significantly
reduced MTY and TTY, with yield reductions ranging from 1.86% to 65.74% and an average reduction of 31.70%. Genotypes
such as WS/19-911 (yield reduction – 1.86%), WS/17-321 (2.39%) and WS/18-407 (3.16%) demonstrated superior tolerance,
exhibiting minimal yield reductions, while others, including WS/17-717 (65.74%), WS/19-701 (63.64%) and WS/17-813 (60.43%),
showed high susceptibility. Among released varieties, Kufri Bahar exhibited the lowest yield reduction (7.32%) in the
current investigation. The Stress susceptibility index (SSI) varied across genotypes, with tolerant lines maintaining stable
yields under stress. These findings highlight the potential of salinity-tolerant genotypes for breeding programs aimed at
improving potato productivity in saline environments. This research underscores the importance of selecting genotypes
that combine high marketable yields with resilience to salinity stress for sustainable cultivation.

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