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Response of popular rice varieties to late sown high temperature conditions in field

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Title Response of popular rice varieties to late sown high temperature conditions in field
Not Available
 
Creator Vishnu Prasanth T. Vishnu Kiran D. Subrahmanyam, M. Suchandranath Babu K. N. Swamy, S. R. Voleti, Tripura Venkata VGN V. Ravindra Babu N. Sarla ,Satendra K. Mangrauthia
 
Subject Heat stress, Popular rice varieties, Heat susceptibility index,Leaf temperature ,Net photosynthetic rate
 
Description Not Available
Abstract Increasing episodes of high temperature (HT) is becoming a serious threat to rice production throughout the
world. Studies on the response of popular rice varieties to HT stress in natural field conditions are very limited.
Hence, we tested six popular rice varieties for their response to HT stress imposed by late sowing under field
conditions. Effect of heat stress was evaluated based on the following traits: flag leaf chlorophyll content (SPAD), flag leaf temperature, net photosynthetic rate (PN), stomatal conductance (gs), spikelet fertility and yield per plant
(YPP). High temperature stress decreased overall spikelet fertility by 16% and yield per plant by 29%. Based on the
heat susceptibility index (HSI) of all the traits, Nagina22 and a restorer line KMR3 were identified as highly tolerant
and a high yielding mega variety BPT5204 and a drought tolerant cultivar Vandana were identified as highly susceptible to heat stress. Further, HSI values for SPAD, PN and YPP showed significant correlation indicating that
these traits are highly useful in screening genotypes for HT stress in late sown conditions.
Not Available
 
Date 2018-12-13T06:27:00Z
2018-12-13T06:27:00Z
2017-06-28
 
Type Journal
 
Identifier Not Available
ISSN 0019-5502
http://krishi.icar.gov.in/jspui/handle/123456789/15892
 
Language English
 
Relation Not Available;
 
Publisher Springer