Author(s):

Roshan Parihar, Ajay Prakash Agrawal, Maumita Burman and Madhuri Grace Minz

Abstract: Wheat (Triticum aestivum L.) is an important cereal crop of cool climates, and plays a key role in the food and nutritional security of India. The objective of this study was to analyse the inter-relationship of various quantitive characters and their contribution on seed yield under terminal heat stress. Forty nine wheat entries / genotypes along with check varieties were studied for various characters contributed to yield under terminal heat stress at Barrister Thakur Chhedilal college of Agriculture and Research Station, Sarkanda Bilaspur, Chhattisgarh. Generally, the estimates of genotypic correlation coefficients were higher than the corresponding phenotypic correlation coefficients for all the character combinations. Seed yield was significantly and positively associated with number of spikelets plant-1, followed by number of effective tillers and 1000-seed weight at both phenotypic and genotypic levels. Seed yield showed a significant negative association with number of seeds spikelet-1 at genotypic level. Among the significant inter-relationships, the association of days to 50 % spike emergence with days to maturity and 100-seed weight were significant and positive, but were negative and significantly associated with number of seeds spikelet-1 and number of grains spike-1. Similarly, the associations of spike length with number of seeds spikelet-1, and number of spikelets plant-1 and number of effective tillers were negative and significant. The association of number of spikelets plant-1 with number of effective tillers was also positive and highly significant.

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