Book of Extended summaries ISDA
Book of Extended summaries ISDA Book of Extended summaries ISDA
International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad Images of brace roots angle (BA), brace roots branching density (BB), crown roots number (CN), crown root s angle (CA) and crown roots branching (CB) displayed were scored with 1, 3, 5, 7 and 9 Conclusion The maize inbred lines used in the present study were developed from the genetic resources of NEH regions. Diverse maize landraces showing distinct and unique traits with high ability to face extreme weather conditions are reported from this region and these genotypes are being utilized for developing inbred lines. These lines needs to be screened for various abiotic stresses including excess moisture stress for developing hybrids tolerant to excess moisture conditions. References Abenavoli, M. R., Leone, M., Sunseri, F., Bacchi, M. and Sorgona, A. 2016. Root phenotyping for drought tolerance in bean landraces from Calabria (Italy). J Agron Crop Sci. 202(1): 1–12. Liu, Y.Z., Bin, T., Zheng, Y. L., Xu, S. Z. and Qiu, F. Z. 2010. Screening methods for waterlogging tolerance at maize (Zea mays L.) seedling stage. Agricultural Sciences in China. 9(3): 362-369. Liu, Z., Gao, K., Shan, S., Gu, R., Wang, Z., Craft, E. J., Mi, G., Yuan, L. and Chen, F. 2017. Comparative Analysis of Root Traits and the Associated QTLs for Maize Seedlings Grown in Paper Roll, Hydroponics and Vermiculite Culture System. Front. Plant Sci. 8:436. doi: 10.3389/fpls.2017.00436 Poorter, H. and Nagel, O. 2000. The role of biomass allocation in the growth response of plants to different levels of light, CO2, nutrients and water. Aust. J. Plant Physiol. 27: 595– 607. 415 | 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 Managing genetic resources for enhanced stress tolerance T3-38P-1241 Study on Inter-Relation of Yield and The Associated Traits in Maize Hybrids Under Rainfed Conditions K.R.V. Sathya Sheela 1* , S. Lakshmi Narayanan 2 , R. Radhajeyalakshmi 1 , T. Selvakumar 1 and N. Satheesh Kumar 1 1 Maize Research Station, TNAU, Vagarai 624 613, Tamil Nadu, India 2 AC&RI, Madurai, TNAU, Coimbatore 641003, Tamil Nadu, India *sathyakrv@yahoo.co.in Maize (Zea mays L.), known as ‘queen of cereals’ is the third important food crop after rice and wheat. In addition to staple food for human being and quality feed for animals, maize serves as a basic raw material as an ingredient to thousands of industrial products that includes starch, oil, protein, alcoholic beverages, food sweeteners, pharmaceutical, cosmetic, film, textile, gum, package and paper industries etc. It is grown under wider agro-climatic conditions. Selection of promising genotypes and planning management practices to improve yield is a challenging issue under rainfed conditions. Spatio-temporal variations in rainfall and temperature affects maize production (Premalatha and Kalamani, 2010). Water limitation has adverse effect on yield and the development of hybrids with reasonable level of drought tolerance is essential for sustainable maize production under water limited conditions. Reduction in grain yield and yield components of maize hybrids under stress conditions is often correlated with changes of some phenotypic expressions. This study aimed to assess the responses of grain yield and important phenotypic characteristics of maize hybrids under water limited conditions. Methodology The experimental study was conducted at Maize Research Station, Vagarai during October - January 2021. In this study, 19 hybrids from newly developed crosses along with two checks were evaluated in two replications in Randomized Block Design under rainfed conditions. The biometrical traits viz., plant height, ear height, days to to 50% tasseling, days to 50% silking, anthesis silking interval, cob length, no of rows per cob, hundred seed weight, shelling percentage and grain yield were recorded. Correlation among the traits was studied using TNAU Stat statistical package. Results Grain yield, as a complex variable, can reflect the interaction of the environment and management with the growth and development processes that occur throughout the crop’s maturation cycle (Adnan et al., 2020 and Premalatha et al., 2010) and in addition, yield component traits adjust their expressions to determine grain yield under different 416 | Page
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International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &<br />
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad<br />
Images <strong>of</strong> brace roots angle (BA), brace roots branching density (BB), crown roots number (CN),<br />
crown root s angle (CA) and crown roots branching (CB) displayed were scored with 1, 3, 5, 7 and 9<br />
Conclusion<br />
The maize inbred lines used in the present study were developed from the genetic resources <strong>of</strong><br />
NEH regions. Diverse maize landraces showing distinct and unique traits with high ability to<br />
face extreme weather conditions are reported from this region and these genotypes are being<br />
utilized for developing inbred lines. These lines needs to be screened for various abiotic stresses<br />
including excess moisture stress for developing hybrids tolerant to excess moisture conditions.<br />
References<br />
Abenavoli, M. R., Leone, M., Sunseri, F., Bacchi, M. and Sorgona, A. 2016. Root phenotyping<br />
for drought tolerance in bean landraces from Calabria (Italy). J Agron Crop Sci. 202(1):<br />
1–12.<br />
Liu, Y.Z., Bin, T., Zheng, Y. L., Xu, S. Z. and Qiu, F. Z. 2010. Screening methods for<br />
waterlogging tolerance at maize (Zea mays L.) seedling stage. Agricultural Sciences<br />
in China. 9(3): 362-369.<br />
Liu, Z., Gao, K., Shan, S., Gu, R., Wang, Z., Craft, E. J., Mi, G., Yuan, L. and Chen, F. 2017.<br />
Comparative Analysis <strong>of</strong> Root Traits and the Associated QTLs for Maize Seedlings<br />
Grown in Paper Roll, Hydroponics and Vermiculite Culture System. Front. Plant Sci.<br />
8:436. doi: 10.3389/fpls.2017.00436<br />
Poorter, H. and Nagel, O. 2000. The role <strong>of</strong> biomass allocation in the growth response <strong>of</strong> plants<br />
to different levels <strong>of</strong> light, CO2, nutrients and water. Aust. J. Plant Physiol. 27: 595–<br />
607.<br />
415 | Page Managing genetic resources for enhanced stress tolerance