Book of Extended summaries ISDA
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Book of Extended summaries ISDA

Book of Extended summaries ISDA Book of Extended summaries ISDA

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20.12.2022 Views

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad Kapoor, D., Bhardwaj, S., Landi, M., Sharma, A., Ramakrishnan, M. and Sharma, A. 2020. The impact of drought in plant metabolism: How to exploit tolerance mechanisms to increase crop production. Appl. Sci., 10(16): 5692. T3-02O-1393 Mapping QTLs for Various Yield Component and Stress Indices in Recombinant Inbred Lines Populations of Wheat (Triticum aestivum L.) Godawari Pawar 1* , Vishwanathan Chinnusamy 2 , Monika Dalal 3 , S. Sudhir Kumar 2 , Harikrishna and Biswabiplab Singh 2 1 VNMKV, Parbhani (MS), 2 ICAR-NIPB, New Delhi and 3 ICAR-IARI, New Delhi *gsp.mau@rediffmail.com An experimental set up comprising of 278 RILs and 2 parental lines was conducted at the Division of Plant Physiology, Indian Agricultural Research Institute (IARI), New Delhi. Calculation of indices mainly focus on selecting genotypes that have high yield firstly under yield potential conditions (non-stress) and secondly under stress conditions. Multiple stress indices were calculated on the basis of grain yield, thousand grain weight, grain weight per ear, grain number per ear and harvest index. The correlation among multiple stress indices were seen and presented. Pattern of selection value of TOL, SSI and RCI as minimum and STI, MPI, YSI, HM, GMP and PCI as maximum were considered as indicator for selection of RILs. On this basis of TOL, SSI, RCI and YSI some RILs and on the basis of STI, MPI, HM, GMP and PCI we selected some RILs. These RILs are superior under stress condition. In Field trials calculated stress intensity is 0.38. The larger the value of SI, the more severe is the stress intensity. Grain yield under normal sowing is positively correlated with all indices except STI (-0.01) and YSI (-0.43). Grain yield under heat stress is showing strong positive association with HM (0.94) also with GMP (0.88), MP (0.78) negative with TOL (-0.51) and SSI (- 0.74).This results concluded that population with higher HM are superior under stress conditions and negative association of yield under stress with TOL and SSI, it indicates yield loss under stress conditions. Stress indices MP (0.83, 0.78) and GMP (0.70, 0.88) are suitable to screen tolerance because positive association with grain yield of both treatments. From correlation of different indices, some indices are showing strong association among them so all indices were selected for further discussion except TOL and MP. Traits related to yield Viz., thousand kernel weight, grains/ear, grains weight/ear and harvest index were also used to calculate indices and their correlation were used for further discussion. Inclusive composite interval mapping (ICIM) analysis discovered the total of 55 putative QTLs controlling yield related traits and their stress indices based on heat and control conditions on field. These QTLs were found distributed across the chromosomes with LOD values varied from 2.509 to 5.485. Among multiple stress indices 9 QTLs controlling the harmonic mean and 337 | Page Managing genetic resources for enhanced stress tolerance

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad susceptibility tolerance index, likewise for geometric mean productivity, mean productivity and production capacity we found 8 QTLs for each index on the basis of different yield related traits i.e. grain numbers per spike, grain weight per spike, thousand kernel weight, total grain weight and harvest index. We propose this method for evaluation of wheat genotypes in terms of their resilience to stress and their production capacity. This methodology will reduce the time required for first selection and the number of first-selected genotypes for further evaluation by breeders and provide a basis for appropriate comparisons of genotypes that would help reveal the biology behind high stress productivity of crops. T3-03O-1463 Studies on Soybean Based Rainfed Cropping Sequences in Vertisols of Madhya Pradesh Narendra Kumawat*, M.L. Jadav, D.V. Bhagat, S.K. Choudhary and K.S. Bangar All India Coordinated Research Project for Dryland Farming, College of Agriculture (RVSKVV) Indore – 452 001, Madhya Pradesh, India *kumawatandy@gmail.com The traditional cropping systems in kharif are soybean, cotton, maize, etc. and intercropping systems are soybean + maize/pigeonpea/etc. Length of growing period is 90-120 days. Generally, soybean is grown as a monsoon season crop under rainfed situation mainly under Vertisols and associated soils. It has resulted increased cropping intensity and profitability. In Malwa and Nimar valley region, its cultivation is largely practiced in rainy season followed by gram/wheat on conserved soil moisture. Under irrigated conditions, soybean is largely grown in soybean-wheat cropping system, while soybean-chickpea cropping system is prevalent under rainfed conditions. The major cropping system in the Vertisols and associated soils of Central India under regime is soybean-wheat in which soybean is a rainfed crop. Methodology Field experiments were conducted at AICRP for Dryland Agriculture, College of Agriculture (RVSKVV), Indore (MP) during 2018-19 to 2020-21, to find out the suitable cropping sequences for Malwa and Nimar valley region. Nine cropping sequences including soybean/maize/blackgram-based cropping systems, viz., soybean-chickpea, soybean-safflower, soybean-mustard, maize-chickpea, maize-safflower, maize-mustard, blackgram-chickpea, blackgram-safflower and blackgram -mustard were tested in randomized block design with 5 replications. The present study mainly aims at finding the impact of soybean based cropping sequences on productivity and profitability under rainfed condition. Managing genetic resources for enhanced stress tolerance 338 | Page

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &<br />

Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad<br />

susceptibility tolerance index, likewise for geometric mean productivity, mean productivity<br />

and production capacity we found 8 QTLs for each index on the basis <strong>of</strong> different yield related<br />

traits i.e. grain numbers per spike, grain weight per spike, thousand kernel weight, total grain<br />

weight and harvest index. We propose this method for evaluation <strong>of</strong> wheat genotypes in terms<br />

<strong>of</strong> their resilience to stress and their production capacity. This methodology will reduce the<br />

time required for first selection and the number <strong>of</strong> first-selected genotypes for further<br />

evaluation by breeders and provide a basis for appropriate comparisons <strong>of</strong> genotypes that would<br />

help reveal the biology behind high stress productivity <strong>of</strong> crops.<br />

T3-03O-1463<br />

Studies on Soybean Based Rainfed Cropping Sequences in Vertisols <strong>of</strong><br />

Madhya Pradesh<br />

Narendra Kumawat*, M.L. Jadav, D.V. Bhagat, S.K. Choudhary and K.S. Bangar<br />

All India Coordinated Research Project for Dryland Farming, College <strong>of</strong> Agriculture (RVSKVV)<br />

Indore – 452 001, Madhya Pradesh, India<br />

*kumawatandy@gmail.com<br />

The traditional cropping systems in kharif are soybean, cotton, maize, etc. and intercropping<br />

systems are soybean + maize/pigeonpea/etc. Length <strong>of</strong> growing period is 90-120 days.<br />

Generally, soybean is grown as a monsoon season crop under rainfed situation mainly under<br />

Vertisols and associated soils. It has resulted increased cropping intensity and pr<strong>of</strong>itability. In<br />

Malwa and Nimar valley region, its cultivation is largely practiced in rainy season followed by<br />

gram/wheat on conserved soil moisture. Under irrigated conditions, soybean is largely grown<br />

in soybean-wheat cropping system, while soybean-chickpea cropping system is prevalent under<br />

rainfed conditions. The major cropping system in the Vertisols and associated soils <strong>of</strong> Central<br />

India under regime is soybean-wheat in which soybean is a rainfed crop.<br />

Methodology<br />

Field experiments were conducted at AICRP for Dryland Agriculture, College <strong>of</strong> Agriculture<br />

(RVSKVV), Indore (MP) during 2018-19 to 2020-21, to find out the suitable cropping<br />

sequences for Malwa and Nimar valley region. Nine cropping sequences including<br />

soybean/maize/blackgram-based cropping systems, viz., soybean-chickpea, soybean-safflower,<br />

soybean-mustard, maize-chickpea, maize-safflower, maize-mustard, blackgram-chickpea,<br />

blackgram-safflower and blackgram -mustard were tested in randomized block design with 5<br />

replications. The present study mainly aims at finding the impact <strong>of</strong> soybean based cropping<br />

sequences on productivity and pr<strong>of</strong>itability under rainfed condition.<br />

Managing genetic resources for enhanced stress tolerance<br />

338 | Page

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