Molecular and morpho-agronomic traits for vegetative stage drought tolerance in some rainfed elite rice lines
Journal Title: Annals of Tropical Research - Year 2022, Vol 44, Issue 2
Abstract
Selection of drought-tolerant rice genotypes is still one of the most vital challenges in rice research and the use of molecular markers may offer a promising approach to fast track the selection and development of drought-tolerant rice. The aim of our study is to identify drought-tolerant traits, in selected rainfed elite rice lines, expressed during drought stress at the vegetative stages 20-32 DAS and 30-42 DAS. The study also validated the presence of SSR markers linked to drought tolerance. All morpho-agronomic traits examined in the study were significantly affected by drought, except for root length during 30-42 DAS of drought imposition. Drought significantly reduced the plant height, number of tillers, leaf area, and root number resulting in a significant reduction in root and shoot dry weight. On the other hand, an increase in total nodal root length was observed in all test genotypes except for AL-55, AL-97, and susceptible check PSB Rc82 under both drought conditions. All parameters examined in this study are useful traits for drought tolerance in rice, however responses might be genotype-dependent. The highest correlation was shown by root:shoot ratio (r=0.94, r=0.78) at 20 DAS and (r=0.89, r=0.67) at 30 DAS under well-watered and drought conditions, respectively. Seven amplified markers were present in the test genotypes except for RM 525, RM 60, RM 201, RM 1141. These four markers were absent in the drought-susceptible check PSB Rc82, hence, these markers may be used in selecting drought-tolerant genotypes through marker-assisted selection.
Authors and Affiliations
Minerva L. Gaurana-Nuñez, Pompe C. Sta. Cruz
Keywords
Related Articles
- EP ID EP755453
- DOI https://doi.org/10.32945/atr4422.2022
- Views 28
- Downloads 0
A transdisciplinary approach to combatting the threat of African swine fever in Philippine Endemic Pigs
African swine fever (ASF) is an infectious viral disease clinically presented with a massive mortality rate in domestic and wild pigs. The Philippines is home to four endemic wild pigs vulnerable to population wipeout du...
Comparative DNA Analysis of Coconut (Cocos nucifera L.) palms with polyembryonic and monoembryonic origins
Makapuno is a rare, high-value coconut in the Philippines known for its extraordinary thick gelatinous meat with various uses in the food industry. Homozygous makapuno embryos do not germinate in vivo so plantlets are pr...
Reproduction performance of sows inseminated with stress gene-free semen given probiotic- supplemented feed
This study generally aimed to assess the effect of supplementation with various levels of a novel product containing probiotic and yeast cells, a feed enzyme, short-chain oligosaccharides, and herbal extracts (Farmer Pec...
Prevalence and risk factors associated with Fasciola gigantica and Paramphistomum cervi infection through actual retrieval in Philippine Carabaos in Ormoc City Abattoir, Philippines
This study determine the prevalence and risk factors associated with Fasciola and Paramphistomum and the co-infection of both parasites in 246 Philippine carabaos slaughtered in Ormoc City abattoir. Upon postmortem exami...
Knowledge, attitudes, and practices relating to rabies control in Baybay City, Leyte, Philippines
The study assessed knowledge, attitudes and practices (KAP) pertinent to rabies among 1187 households from 68 barangays in Baybay City to provide baseline information on the levels of knowledge, attitudes and practices o...