Heterosis and reciprocal effects for physiological and morphological traits of popcorn plants under different water conditions

Kamphorst, Samuel Henrique; Júnior, Antônio Teixeira do Amaral; Vergara-Díaz, Omar; Gracia‐Romero, Adrian; Fernandez-Gallego, José A.; Chang-Espino, Melissa; Buchaillot, Ma. Luisa; Rezzouk, Fatima Zahra; Lima, Valter Jário de; Serret, María Dolores; Ortega, J. L. Araus

doi:10.1016/j.agwat.2021.107371

Cited by 23 publications

(21 citation statements)

References 58 publications

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Section: Introductionmentioning

confidence: 99%

“…Heterosis refers to the superior performance of heterozygous hybrid plants over their homozygous parental inbred lines; indeed, exploitation of heterosis has been described as beneficial and fundamental to mitigating environmental stresses, such as the stress associated with soil water limitation [1][2][3][4]. Heterosis has been a mediator in optimizing water use [1,3]. In a water-limited environment and for physiological and photosynthesisrelated traits, cumulative transpiration, and root traits, Chairi et al (2016) [4] described the effects of heterosis.…”

Section: Introductionmentioning

confidence: 99%

“…In a water-limited environment and for physiological and photosynthesisrelated traits, cumulative transpiration, and root traits, Chairi et al (2016) [4] described the effects of heterosis. In the initial growth of plants [5], in the juvenile phase [1,2], and in adult plants, heterosis has been demonstrated as an important phenomenon for confere higher biomass accumulation and grain production [6][7][8][9][10][11], which allows genotypes with higher water use efficiency and/or tolerance to water deficit to be obtained.…”

Section: Introductionmentioning

confidence: 99%

“…Understanding the inheritance of physiological and agronomic traits may present opportunities to increase grain yield potential and to adapt plants to water deficit conditions. In the study by Kamphorst et al (2022) [1], it was found that shoot biomass, whole plant area, carbon isotope discrimination, net CO 2 assimilation rate, stomatal conductance, transpiration, cumulative plant transpiration, and root weight density were considered key traits for adaptation to drought tolerance in popcorn. These traits were relevant in the efficient discrimination of superior hybrids in water stress environments.…”

Section: Introductionmentioning

confidence: 99%

“…The market of the popcorn seed, belonging to the species Zea mays L., to the family Poaceae, subfamily Panicoideae, and tribe Maydeae [12], has offered cultivars with high yield potential, suitable for growing under the adequate availability of water in the soil [1,13,14]. However, in the current climate change situation, increasingly severe episodes of water deficit are expected, which is the main stress that compromises crop yield.…”

Section: Introductionmentioning

confidence: 99%

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Heritability of Morphophysiological Traits in Popcorn for Drought Tolerance and Their Use as Breeding Indicators of Superior Genotypes

et al. 2022

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This study aimed to identify the genetic control of morphological, water status, and root traits in four inbred lines and their pre-selected hybrid combinations of popcorn, and to identify the best parents and hybrids. The plants were grown under greenhouse conditions, and with two water conditions—water-stressed (WS) and well-watered (WW). We evaluated shoot biomass (SB), whole plant leaf area (WPLA), chlorophyll content, carbon isotope discrimination, net CO2 assimilation rate, the stomatal conductance, transpiration, cumulative plant transpiration, and root weight density in three sections. The reductions in SB and WPLA are attributed to stomatal causes, given the maintenance of water condition values in water-stressed plants. In fact, the stomata were closed for long periods during plant growth under the water-stressed condition, as indicated by the more negative carbon isotope discrimination values. The root weight density, regardless of soil depth and water conditions, was higher in hybrids. There was a preponderance of non-additive effects in the control of morphological and root traits, especially in the WS condition, and heterosis was shown to be the fundamental strategy for obtaining superior hybrids. For water status traits, it is essential to choose the female parent in the crossing block, given the maternal effect expressed by net CO2 assimilation rate, stomatal conductance, and transpiration.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Heritability of Morphophysiological Traits in Popcorn for Drought Tolerance and Their Use as Breeding Indicators of Superior Genotypes

et al. 2022

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Molecular dissection of heterosis in cereal roots and their rhizosphere

Baldauf

Hochholdinger

2023

Theor Appl Genet

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Key message Heterosis is already manifested early in root development. Consistent with the dominance model of heterosis, gene expression complementation is a general mechanism that contributes to phenotypic heterosis in maize hybrids. Abstract Highly heterozygous F1-hybrids outperform their parental inbred lines, a phenomenon known as heterosis. Utilization of heterosis is of paramount agricultural importance and has been widely applied to increase yield in many crop cultivars. Plant roots display heterosis for many traits and are an important target for further crop improvement. To explain the molecular basis of heterosis, several genetic hypotheses have been proposed. In recent years, high-throughput gene expression profiling techniques have been applied to investigate hybrid vigor. Consistent with the classical genetic dominance model, gene expression complementation has been demonstrated to be a general mechanism to contribute to phenotypic heterosis in diverse maize hybrids. Functional classification of these genes supported the notion that gene expression complementation can dynamically promote hybrid vigor under fluctuating environmental conditions. Hybrids tend to respond differently to available nutrients in the soil. It was hypothesized that hybrid vigor is promoted through a higher nutrient use efficiency which is linked to an improved root system performance of hybrids in comparison to their inbred parents. Recently, the interaction between soil microbes and their plant host was added as further dimension to disentangle heterosis in the belowground part of plants. Soil microbes influenced the performance of maize hybrids as illustrated in comparisons of sterile soil and soil inhabited by beneficial microorganisms.

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