SCREENING OF HEAT TOLERANCE WHEAT GERMPLASM UNDER LATE SEEDED CONDITION
Amit Kumar, R.S.Sengar, Raj Singh, Anju Rani, Gyanika Shukla and Vineet Girdharwal
Climate change is not an issue it has become a challenge to deal with Agriculture and climate change are interrelated processes, both of which take place on a global scale. Temperature is increasing constantly and effect on productivity of major agriculture crops. The adverse effects of temperature on plants, higher than optimal temperature is considered as heat stress. In our experiment 10 wheat genotypes (AKW 1071, K9006, K0307, K 7903, RAJ 3765, LOK 1, V1, V2, V3, and K65) were grown at different sown dates during Rabi season 2014. The sowings were done on 20 November, 10th December and 30th December. Heat stress/ late sown had significant effect on all agronomic trait. In both treatment (T1 & T2) Raj 3765, Lok-1, K-7903 showed minimum reduction in all agronomic trait while maximum reduction were observed in V1, V2, AKW-1071, K0307. The chlorophyll content of normal sown is greater than the late sown condition. The maximum reduction in chlorophyll content was recorded in V1 under both T1 and T2 while minimum reduction was recorded in Raj 3765 followed by Lok 1 and K 7903. Three lines Raj-3765, K-7903 and Lok-1 showed maximum grain development and survival under heat stress condition. This study revealed that these genotypes (Raj-3765, K7903 and Lok-1) can be utilized in optimum as well as late sown condition.