relation: http://oar.icrisat.org/11762/
title: Novel sources of drought tolerance from landraces and wild sorghum relatives
creator: Ochieng, G
creator: Ngugi, K
creator: Wamalwa, L K
creator: Manyasa, E
creator: Muchira, N
creator: Nyamongo, D
creator: Odeny, D A
subject: Drought Tolerance
subject: Sorghum
description: Sorghum (Sorghum bicolor [L.] Moench) is the fifth most important cereal crop  worldwide and second aftermaize (Zeamays L.) in Kenya. It is an important food  security crop in arid and semi-arid lands, where its production potential is hampered  by drought. Drought tolerance can be measured by a plant’s ability to resist  premature senescence, often described as stay-green. This study was carried out  with the objective of identifying novel stay-green trait among wild and landrace  genotypes of sorghum. Forty-four sorghum genotypes that included 16 improved,  nine landraces, and 17 wild relatives of sorghum alongside known stay-green  sources, B35 and E36-1, were evaluated under well-watered and water-stressed  conditions in an alpha-lattice design of three replications. Data was collected on  plant height (PHT), flag leaf area (FLA), panicle weight (PWT), 100-seed weight  (HSW), relative chlorophyll content (RCC), number of green leaves at maturity  (GLAM), days to 50% flowering (DFL), and grain yield (YLD). Genetic diversity  was determined using diversity arrays technology (DArT) sequencing and quality  control (QC) markers were generated using a java script. Lodoka, a landrace,  was the most drought-tolerant genotype, recorded the highest numbers of RCC  and GLAM, and outperformed B35 and E36-1 in yield under water-stress and  well-watered conditions. The RCC was highly correlated with GLAM (r = .71)  and with yield-related traits, HSW (r = .85), PWT (r = .82), and YLD (r = .78).  All traits revealed high heritability (broad-sense) ranging from 60.14 to 98.4% for  RCC and DFL, respectively. These results confirm earlier reports that wild relatives  and landraces are a good source of drought tolerance alleles.
publisher: Crop Science Society of America
date: 2020-11
type: Article
type: PeerReviewed
format: application/pdf
language: en
identifier: http://oar.icrisat.org/11762/1/csc2.20300.pdf
identifier:   Ochieng, G and Ngugi, K and Wamalwa, L K and Manyasa, E and Muchira, N and Nyamongo, D and Odeny, D A  (2020) Novel sources of drought tolerance from landraces and wild sorghum relatives.  Crop Science (TSI), 61 (1).  pp. 104-118.  ISSN 0011-183X     
relation: https://doi.org/10.1002/csc2.20300
relation: doi:10.1002/csc2.20300