Author(s):

Anand Kumar, Tejashwini Agrawal, Sanjay Kumar, Anil Kumar, Ravi Ranjan Kumar, Manoj Kumar, Chandan Kishore and PK Singh

Abstract: Chickpea (Cicer arietinum L.) is a cool-season food legume and suffers heavy yield losses when exposed to heat stress at the reproductive (flowering and podding) stage. Heat stress is increasingly becoming a severe constraint to chickpea production due to the changing scenario of chickpea cultivation and expected overall increase in global temperatures due to climate change. A temperature of 35 °C was found to be critical in differentiating heat-tolerant genotypes in chickpea under field conditions. An experiment was conducted during Rabi 2016-17 at Pulses Research farm, Bihar Agricultural University, Sabour (Bhagalpur) to study the genetic variability, correlation and path analysis for seed yield and its component characters in thirty six Desi chickpea genotypes. The sowing was carried out on15th December 2016 (late sown) at Pulse Research farm, Bhitti, Bihar Agricultural University Sabour. In field condition, in case of late sowing, chickpea plants met to high of these genotypes environment temperature (≥ 35 °C) during its reproductive stage which creates an unfavorable heat stress condition and affects its seed yield. The analysis of variance revealed the significant differences among the genotypes for all the traits indicating presence of sufficient variability among the genotypes for various traits. The high GCV and PCV were observed for grain yield per plot followed by biological yield, effective pods per plant, total number of pods per plant, 100-seed weight and primary branches per plant. High heritability coupled with high genetic advance over mean was observed for plant height, number of primary branches per plant, number of secondary branches per plant, total number of pods per plant, effective pods per plant, biological yield, 100 seed weight, grain yield per plant and grain yield per plot which suggested that these characters can be considered as favourable attributes for the improvement through selection and this may be due to presence of additive genes effect and thus, could be improved upon by adapting selection without progeny testing.. Seed yield per plant was positively and significantly correlated chlorophyll index, number of primary branches per plant, total number of pods per plant, effective pods per plant, biological yield, harvest index and 100- seed weight indicating that these three traits were main yield attributing traits. The path analysis revealed that the chlorophyll index, effective pods per plant and 100 -seed weight had maximum direct effect on seed yield. On the basis of seed yield, IPC2010-62, BRC-2, Sabour chana-1 and GNG2215 were identified as promising heat tolerant genotypes. Therefore, these genotypes in future may prove better for developing heat tolerant genotypes for rice fallow area of Bihar and can be used in hybridization programme of chickpea

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