Exploring genotypic diversity in sorghum breeding lines for water-saving traits to enhance drought adaptation during the post-rainy season

Kaliamoorthy, S and Gaddameedi, A and Murugesan, T and Gorthy, S and Sravani, B and Neelam, N and Jayakumar, J and Choudhary, S and Kholova, J and Govindaraj, M (2024) Exploring genotypic diversity in sorghum breeding lines for water-saving traits to enhance drought adaptation during the post-rainy season. Crop Science (TSI), 64 (5). pp. 2630-2651. ISSN 0011-183X

PDF - Published Version Restricted to Repository staff only Available under License ["licenses_description_cc_attribution" not defined]. Download (930kB) | Request a copy

Abstract

Sorghum [Sorghum bicolor (L.) Moench], a crucial staple crop in South Asia and sub-Saharan Africa, faces challenges amid increasing climate variability. Post-rainy sorghum serves as a dominant food and fodder crop in India. Aligned with International Crops Research Institute for the Semi-Arid Tropics's post-rainy sorghum product profile, this research extensively characterizes sorghum lines, emphasizing the traits vital for post-rainy drought adaptation in hybrid parents. We examined genotypic differences and trait correlations in 25 sorghum hybrid parents and varieties (B line for seed parent, R line for restorer, and check for varieties) through atmospheric and soil drought experiments. Results from atmospheric drought experiments revealed significant variation in transpiration rate (TR) under high vapor pressure deficit (VPD), with certain lines showing limited TR (BTX623 and ICSR 21002), while others exhibited high TR. In soil drought experiments, transpiration decline occurred at fractions of transpirable soil water ranging between 0.38 (ICSR 174) and 0.65 (40162 and ICSR 21005). R lines consistently displayed superior plant growth, water use, and biomass compared to B lines. Transpiration efficiency (TE) and total biomass showed positive correlations (r2 = 0.69) in well-watered and (r2 = 0.45) in water-stressed conditions. Most R lines displayed higher biomass and TE. Genotypes exhibiting enhanced vigor and limited TR in high VPD conditions and high TE hold potential for enhancing drought adaptation in post-rainy sorghum. Notably, genotypes with higher biomass, lower TR, and increased TE within both R and B line groups represent valuable genetic resources for enhancing sorghum crops, post-rainy sorghum adaptation to water deficit.

Item Type:	Article
Divisions:	Global Research Program - Accelerated Crop Improvement
CRP:	UNSPECIFIED
Uncontrolled Keywords:	breeding, genotypic diversity, drought adaptation, post-rainy season, Sorghum
Subjects:	Mandate crops > Sorghum Others > Drought Others > Genetics and Genomics
Depositing User:	Mr Nagaraju T
Date Deposited:	25 Oct 2024 05:34
Last Modified:	25 Oct 2024 05:34
URI:	http://oar.icrisat.org/id/eprint/12849
Official URL:	https://acsess.onlinelibrary.wiley.com/doi/abs/10....
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	This research received support from the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Telangana, India. The authors express their gratitude to the Controlled Environment Research Facility (CERF) team for their valuable support throughout the experimentation. This study received partial funding through the sub-project titled “accelerated varietal improvement and seed delivery of legumes and cereals in Africa (AVISA): Root system architecture and its association with yield under limited water regimes in diverse sorghum lines” “(2020-2021).” Kaliamoorthy Sivasakthi was grateful to the financial support received from the Global Challenges Research Fund through TIGR2ESS Project: Transforming India’s green revolution by research and empowerment for sustainable food supplies (BB/P027970/1) and the Department of Science and Technology, Science and Engineering Research Board (DST-SERB)—National Post-Doctoral Fellowship (PDF/2021/003345). Murugesan Tharanya was supported by the DST-SERB, specifically through the National Post-Doctoral Fellowship (PDF/ 2018/001919). Jana Kholovà was supported by an internal grant from the Faculty of Economics and Management, Czech University of Life Sciences Prague (Grant Life Sciences 4.0 Plus no. 2022B0006).
Links:	Google Scholar

View Statistics

Actions (login required)

View Item