Identification of drought tolerant populations at multi-stage growth phases in temperate maize germplasm

Djemel, Abderahmane; Álvarez-Iglesias, Lorena; Pedrol, Nuria; Lozano, Ana; Ordás, A.; Revilla, Pedro

doi:10.1007/s10681-018-2223-2

Cited by 13 publications

(13 citation statements)

References 47 publications

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“…Indeed, in our field study, and in agreement with previous results in maize populations [75][76][77] plant stem height (PH) was already affected by water deprivation in all the four populations at a moderate water deficit (20% SWC), while for the majority of the populations, leaf gas exchange parameters of the stress exposed plants were similar to that of the non-stressed plants until 87% of the soil moisture was depleted (13% SWC). A reduction on shoot length (SL) when water deficit was still moderate (25-15% SWC) was also observed for maize seedlings grown under the growth chamber conditions experiment agreeing with previous results from Reference [67].…”

Section: Diversity Of Responses Under Moderate Stress Similar Stratesupporting

confidence: 91%

“…Under extreme drought, the populations behavior became very similar in what concerned eco-physiology parameters but also morphology and final production in agreement with previous maize reports [26,67].…”

Section: Diversity Of Responses Under Moderate Stress Similar Stratesupporting

confidence: 90%

“…In all the four analyzed maize populations, yield (using ear weight (EW) as a proxy since no prolific plants were detected) was reduced under dry conditions in agreement with previous literature [67][68][69]. However, the four populations show different yield potentials (measured as EW under WW conditions).…”

Section: Portuguese Maize Populations Depict Significant Variation Insupporting

confidence: 88%

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Maize Open-Pollinated Populations Physiological Improvement: Validating Tools for Drought Response Participatory Selection

et al. 2019

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Participatory selection—exploiting specific adaptation traits to target environments—helps to guarantees yield stability in a changing climate, in particular under low-input or organic production. The purpose of the present study was to identify reliable, low-cost, fast and easy-to-use tools to complement traditional selection for an effective participatory improvement of maize populations for drought resistance/tolerance. The morphological and eco-physiological responses to progressive water deprivation of four maize open-pollinated populations were assessed in both controlled and field conditions. Thermography and Chl a fluorescence, validated by gas exchange indicated that the best performing populations under water-deficit conditions were ‘Fandango’ and to a less extent ‘Pigarro’ (both from participatory breeding). These populations showed high yield potential under optimal and reduced watering. Under moderate water stress, ‘Bilhó’, originating from an altitude of 800 m, is one of the most resilient populations. The experiments under chamber conditions confirmed the existence of genetic variability within ‘Pigarro’ and ‘Fandango’ for drought response relevant for future populations breeding. Based on the easiness to score and population discriminatory power, the performance index (PIABS) emerges as an integrative phenotyping tool to use as a refinement of the common participatory maize selection especially under moderate water deprivation.

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Section: Diversity Of Responses Under Moderate Stress Similar Stratesupporting

confidence: 91%

Section: Diversity Of Responses Under Moderate Stress Similar Stratesupporting

confidence: 90%

Section: Portuguese Maize Populations Depict Significant Variation Insupporting

confidence: 88%

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Maize Open-Pollinated Populations Physiological Improvement: Validating Tools for Drought Response Participatory Selection

et al. 2019

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“…Meeks et al [11] postulated that screening maize cultivars at seedling stage could help identify drought tolerant inbred lines at imminent growth stages. Few studies ascertaining this proposition have been conducted in maize breeding programs [12].…”

Section: Introductionmentioning

confidence: 99%

Response of Yellow Quality Protein Maize Inbred Lines to Drought stress at Seedling Stage

Chiuta

Mutengwa

2018

Agronomy

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This study seeks to evaluate the response of 17 yellow Quality Protein Maize (QPM) inbred line seedlings to drought stress (DS), using different morphophysiological traits (plant height (PH), chlorophyll content (CC), stem diameter (SD), proline content (Pro), photochemical efficiency of photosystem II (PS II), canopy temperature (CT) and substomatal carbon dioxide concentration (Ci). The experiment was laid out in a randomized complete block design (RCBD) and replicated three times in a growth chamber. The seedlings were exposed to DS treatment by growing them at 20% field capacity. The control/well-watered (WW) treatments were kept at 80% field capacity throughout the experiment. Highly significant differences (p < 0.001) were observed for PH, SD, and Pro across environments. On the other hand, significant differences (p < 0.05) were observed for CC and PS II, while DS had no significant effects on Ci and CT. Proline content increased under DS compared to WW conditions. Inbred lines L34, L7, L5, L2, L16, and L6 had approximately equal or more Pro than the drought tolerant check (ZM1523). As such, these lines were regarded as drought tolerant. Taking all measured parameters into consideration, L7 performed notably better than the other inbred lines under DS.

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“…The goal of the research presented here was to investigate adaptation to osmotic stress at germination in diverse landraces of chiles collected from different cultivation regimes and ecozones within southern Mexico. We used polyethylene-glycol (PEG) to induce osmotic stress at the seed stage, as has been done in germination studies of other cultivated and wild species [32][33][34][35][36][37][38][39][40]. In most prior studies, PEG solutions were used to identify cultivars which perform well under both stress and un-stressed conditions, whereas here we aimed to identify G×E interactions among populations as an indication of local adaptation to drought stress.…”

Section: Introductionmentioning

confidence: 99%

Germination response of diverse wild and landrace chile peppers (Capsicum spp.) under drought stress simulated with polyethylene glycol

Bernau

Barbolla

McHale

et al. 2020

Preprint

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AbstractResponses to drought within a single species may vary based on plant development stage, drought severity, and the avoidance or tolerance mechanisms employed. Early drought stress can restrict emergence and seedling growth. Thus, in areas where water availability is limited, rapid germination leading to early plant establishment may be beneficial. Alternatively, germination without sufficient water to support the seedling may lead to early senescence, so reduced germination under low moisture conditions may be adaptive at the level of the population. We studied the germination response to osmotic stress of diverse chile pepper germplasm collected in southern Mexico from varied ecozones, cultivation systems, and of named landraces. Drought stress was simulated using polyethylene glycol solutions. Overall, survival time analysis revealed delayed germination at the 20% concentration of PEG across all ecozones. The effect was most pronounced in the genotypes from hotter, drier ecozones. Additionally, accessions from wetter and cooler ecozones had the fastest rate of germination. Moreover, accessions of the landraces Costeño Rojo and Tusta germinated more slowly and incompletely if sourced from a drier ecozone than a wetter one, indicating that slower, reduced germination under drought stress may be an adaptive avoidance mechanism. Significant differences were also observed between named landraces, with more domesticated types from intensive cultivation systems nearly always germinating faster than small-fruited backyard- or wild-types, perhaps due to the fact that the smaller-fruited accessions have generally undergone less selection. Thus, we conclude that there is evidence of local adaptation to both ecozone of origin and source cultivation system in germination characteristics of diverse chile peppers.

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Identification of drought tolerant populations at multi-stage growth phases in temperate maize germplasm

Cited by 13 publications

References 47 publications

Maize Open-Pollinated Populations Physiological Improvement: Validating Tools for Drought Response Participatory Selection

Maize Open-Pollinated Populations Physiological Improvement: Validating Tools for Drought Response Participatory Selection

Response of Yellow Quality Protein Maize Inbred Lines to Drought stress at Seedling Stage

Germination response of diverse wild and landrace chile peppers (Capsicum spp.) under drought stress simulated with polyethylene glycol

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