International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 8, Issue:4, April, 2019

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : /
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(4): 105-127

Evaluation of Soybean Germplasm Lines for Agro-Morphological Traits and Terminal Drought Tolerance
V. Sreenivasa1*, S.K. Lal2, A. Talukdar2, P. Kiran Babu3, H.K. Mahadeva Swamy1, Darsing R. Rathod2, Raju R. Yadav2, Shatakashi Poonia2, K.V. Bhat3 and C. Viswanathan4
1Division of crop Improvement, ICAR-Sugarcane Breeding institute, Coimbatore, India
2Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi, India
3Division of Plant Genetic Resources, ICAR-National Bureau of Plant Genetic Resources,  New Delhi, India
4Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi, India
*Corresponding author

The occurrence of drought stress at seed filling stage is known to cause severe yield reduction in soybean especially where the crop is grown in rainfed conditions. Screening of large germplasm lines under natural drought conditions is extremely difficult to execute due to unusual rains. In the present study, about 328 germplasm lines are screened for terminal drought tolerance by spraying 0.2% of potassium iodide (KI) at R5 stage and the tolerant lines were again retested under similar conditions in the subsequent year. The lines were classified as tolerant, moderately tolerant and susceptible based on the relative reduction in seed yield and 100-seed weight of treated over control conditions. The Shannon diversity index (SDI) indicated that genotypes were highly diverse for seed colour (Hêž‹= 1.20) and hilum colour (Hêž‹= 0.93). The PCA biplot analysis revealed that lines were more compactly and closely placed under controlled conditions as against treated. Four genotypes (TGX1835-3E, VSL-69, EC-105780 and PK-1243) were identified as relatively drought tolerant lines as they showed less reduction for number of pods per plant, seed yield and hundred seed weight under KI induced drought conditions. These lines were again validated next year and were found to be potential source for the development of drought tolerant varieties for the sustainable soybean production.

Keywords: Terminal, Germplasm accessions, Potassium Iodide (KI), Soybean, drought tolerance

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How to cite this article:

Sreenivasa, V., S.K. Lal, A. Talukdar, P. Kiran Babu, H.K. Mahadeva Swamy, Darsing R. Rathod, Raju R. Yadav, Shatakashi Poonia, K.V. Bhat and Viswanathan, C. 2019. Evaluation of Soybean Germplasm Lines for Agro-Morphological Traits and Terminal Drought Tolerance.Int.J.Curr.Microbiol.App.Sci. 8(4): 105-127. doi:
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