Diversidad Genética en Poblaciones De Razas Mexicanas De Maíz

Barrera-Guzmán, Luis Ángel; Legaria-Solano, Juan Porfirio; Ortega-Paczka, Rafael

doi:10.35196/rfm.2020.1.121

Cited by 5 publications

(3 citation statements)

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“…These results indicate that there is wide diversity in yield components and agronomic traits, due to the effect of the environment, genotypes, their interaction and the use of divergent varieties as parents of intervarietal crosses. The use of genetic diversity allows to identify favourable alleles for genetic improvement (Barrera-Guzmán et al, 2020;González-Martínez et al, 2020); get to know alternative heterotic patterns (Carena, 2005), which can be exploited for the development of varieties with higher productive potential and wider adaptation (Eze et al, 2020;Velasco-García et al, 2019).…”

Section: Analysis Of Variancementioning

confidence: 99%

INTERVARIETAL CROSSES, AN ALTERNATIVE FOR INCREASING YELLOW MAIZE (Zea mays L.) PRODUCTION IN VARIABLE ENVIRONMENTS

Juárez

Santacruz-Várela

González

et al. 2022

agro

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In Mexico, maize (Zea mays L.) is grown under rainfed conditions within immensurable number of variable environments that limit production. To cope with these adversities, genotypes of different genetic constitution have been generated, such as intervarietal crosses; however, knowledge of the yield potential of those crosses in variable environments is limited. The objective of the study was to determine the yield potential of intervarietal crosses of yellow maize in environments of high-valley lands in central Mexico, as well as the components that influence yield under the hypothesis that intervarietal crosses are equal in yield to conventional hybrids. Crosses, open-pollinated parental varieties and commercial controls were evaluated in a randomized complete block design. Fifteen agronomic variables and yield components were measured. A combined analysis of variance and comparison of means (Tukey, p ≤ 0.05) were applied, and Pearson’s correlation coefficients were calculated. The analysis of variance detected statistical differences in all the factors of variation in most of the evaluated variables. The intervarietal crosses performed statistically equal to the controls but superior to the parents. The crosses excelled in ear diameter and ear length, total weight of grains in the ear, 100-grain weight, grain length, grain width, plant height, ear height, shelling corn coefficient and prolificacy index. In 23 crosses, the genotype × environment interaction effect was not significant. Intervarietal crosses have yield potential compared to conventional hybrids. Ear and grain traits had the greatest influence on yield. Intervarietal crosses represent an alternative to increase yield and production of yellow maize in the high-valley lands of central Mexico.

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Section: Analysis Of Variancementioning

confidence: 99%

INTERVARIETAL CROSSES, AN ALTERNATIVE FOR INCREASING YELLOW MAIZE (Zea mays L.) PRODUCTION IN VARIABLE ENVIRONMENTS

Juárez

Santacruz-Várela

González

et al. 2022

agro

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“…Corn ( Zea mays ) has become the leading cereal grain by global production volume, with around 197 million hectares of land cultivated annually [ 3 ]. In Mexico, maize’s center of origin and domestication, some landraces have adapted to different environmental conditions and are locally grown [ 4 ]. Maize landraces are reservoirs of genetic diversity and have been used as donor material for global breeding activities.…”

Section: Introductionmentioning

confidence: 99%

Mycobiota of Mexican Maize Landraces with Auxin-Producing Yeasts That Improve Plant Growth and Root Development

Ramos-Garza

Aguirre-Noyola

Bustamante-Brito

et al. 2023

Plants

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Compared to agrochemicals, bioinoculants based on plant microbiomes are a sustainable option for increasing crop yields and soil fertility. From the Mexican maize landrace “Raza cónico” (red and blue varieties), we identified yeasts and evaluated in vitro their ability to promote plant growth. Auxin production was detected from yeast isolates and confirmed using Arabidopsis thaliana plants. Inoculation tests were performed on maize, and morphological parameters were measured. Eighty-seven yeast strains were obtained (50 from blue corn and 37 from red corn). These were associated with three families of Ascomycota (Dothideaceae, Debaryomycetaceae, and Metschnikowiaceae) and five families of Basidiomycota (Sporidiobolaceae, Filobasidiaceae, Piskurozymaceae, Tremellaceae, and Rhynchogastremataceae), and, in turn, distributed in 10 genera (Clavispora, Rhodotorula, Papiliotrema, Candida, Suhomyces, Soliccocozyma, Saitozyma Holtermaniella, Naganishia, and Aeurobasidium). We identified strains that solubilized phosphate and produced siderophores, proteases, pectinases, and cellulases but did not produce amylases. Solicoccozyma sp. RY31, C. lusitaniae Y11, R. glutinis Y23, and Naganishia sp. Y52 produced auxins from L-Trp (11.9–52 µg/mL) and root exudates (1.3–22.5 µg/mL). Furthermore, they stimulated the root development of A. thaliana. Inoculation of auxin-producing yeasts caused a 1.5-fold increase in maize plant height, fresh weight, and root length compared to uninoculated controls. Overall, maize landraces harbor plant growth-promoting yeasts and have the potential for use as agricultural biofertilizers.

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“…Mexico is considered the center of origin and biodiversity of corn (Barrera-Guzmán et al, 2020); its production and conservation is fundamental, providing many benefits as human and animal food (Gul et al, 2021). The Agenda for Services for the Marketing and Development of Agricultural Markets (ASERCA, 2019) indicated that in Mexico the capacity of agricultural warehouses was 39.56 million tons in 2019, of which 83.7 % are stored indoors and 16.3 % outdoors, allowing small producers to guarantee the conservation of grains (Vázquez & Moreno, 2016), and a source of food (Turrent, 2013).…”

Section: Introductionmentioning

confidence: 99%

Agroecological strategies for Sitophilus zeamais handling in maize stored

et al. 2022

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Sitophilus zeamais is an economically important pest because it feeds on stored corn, since its control is carried out with increasingly toxic insecticides, the objective of the effect of more ecological alternatives such as the application of CaO (quicklime 2 %), Beauveria bassiana (1.109 espores.mL-1), Ricinus communis powder aqueous (1,5 %), modified atmosphere storage (20 L silo) and airtight environment (in barrel of 20 L) on the incidence and damage of S. zeamais in stored corn, in the municipality of Tlacotepec de Benito Juarez, Puebla. The experiment was carried out under a completely randomized block design with five repetitions, where the five control methods mentioned above were tested and compared with a control treatment (plastic bag). Quicklime, storage in a modified atmosphere and storage in a hermetic environment significantly decreased (Tukey, p <0.05) the number of weevils in corn grains during 247 days of storage and the percentage of damage to the grains remained below from 1 %. Therefore, these results showed that the application of quicklime, airtight environment and storage in a modified atmosphere controlled the damage caused by S. zeamais and are highly favorable for the conservation and protection of stored corn grains.

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Diversidad Genética en Poblaciones De Razas Mexicanas De Maíz

Cited by 5 publications

References 0 publications

INTERVARIETAL CROSSES, AN ALTERNATIVE FOR INCREASING YELLOW MAIZE (Zea mays L.) PRODUCTION IN VARIABLE ENVIRONMENTS

INTERVARIETAL CROSSES, AN ALTERNATIVE FOR INCREASING YELLOW MAIZE (Zea mays L.) PRODUCTION IN VARIABLE ENVIRONMENTS

Mycobiota of Mexican Maize Landraces with Auxin-Producing Yeasts That Improve Plant Growth and Root Development

Agroecological strategies for Sitophilus zeamais handling in maize stored

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