Fenología, Crecimiento Y Sincronía Floral De Los Progenitores Del Híbrido De Maíz QPM H-374c

González, Luis Alberto Noriega; Ortiz, Ricardo Ernesto Preciado; Enríquez, Enrique Andrio; Ibarra, A.; Prieto, Jorge Covarrubias

doi:10.29312/remexca.v2i4.1635

Cited by 5 publications

(6 citation statements)

References 17 publications

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“…Based on the foregoing, our results indicate that it is convenient to sow single female crosses in November, so that the vegetative and reproductive phases will develop in the months of cool temperatures from December until the end of February; otherwise, late sowings in December, whose flowering will occur in March, increase the risk of poor pollination due to pollen sterilization [32] so grain filling will be incomplete [16]. In contrast, in temperate zones, late sowings may imply a sudden drop in temperature and solar radiation during grain filling that are associated with low yield [19,33].…”

Section: Relationship Between Sowing Dates Growing Degree Days Flormentioning

confidence: 88%

“…In these cases, technical recommendations often only indicate the days to flowering of the parents and, if applicable, differential plantings between females and males based on the number of days [20,[37][38][39][40]. Phenological characterization of parents based on GDD allows defining with greater precision the optimal sowing date to achieve floral synchrony [16,41]. In only a few publications on maize seed production, both days to flowering and the GDD necessary to reach this phenological stage are indicated.…”

Section: Hybrid Seed Production 321 Floral Synchronization In Hybrmentioning

confidence: 99%

“…In only a few publications on maize seed production, both days to flowering and the GDD necessary to reach this phenological stage are indicated. Similarly, agronomic recommendations for parental management such as localities, planting density, and sowing dates are scarce [16,42]. Private seed companies keep this information secret as part of their confidentiality policies.…”

Section: Hybrid Seed Production 321 Floral Synchronization In Hybrmentioning

confidence: 99%

“…This information coincides with the results of the present study, since both the mean period of pollen release of the male inbred lines as well as the period of exposure of stigmas of the female single crosses were 4 to 5 days (Tables 4, 5, 10 and 11, respectively). However, males, because of inbreeding, show less vigor than females, in which heterosis is present [16]. Therefore, it is recommended to sow males on at least two consecutive sowing dates, so that the pollination period of the males completely encompasses the receptivity period of the females [18].…”

Section: Hybrid Seed Production 321 Floral Synchronization In Hybrmentioning

confidence: 99%

“…Temperature data were recorded at a weather station (Davis Vantage Pro 2) located 260 m (straight line) from the experiments. These data were used to calculate growing degree days (GDD) according to the formula GDD = (Tmax + Tmin)/2 − Tbase, where Tmax and Tmin = daily maximum temperature (if temperature was greater than 30 • C, the value of 30 was recorded) and daily minimum temperature (if the temperature was less than 10 • C, the value of 10 was assigned), respectively; and Tbase = base temperature, 10 • C [15,16].…”

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confidence: 99%

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Effective Seed Yield and Flowering Synchrony of Parents of CIMMYT Three-Way-Cross Tropical Maize Hybrids

et al. 2021

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Genotype, environmental temperature, and agronomic management of parents influence seed yield in three-way cross hybrid maize seed production. The objective of this research was to generate information on the seed production of six three-way cross hybrids and their progenitors, adapted to tropical lowlands. Data on days to—and duration of—flowering, distance to spike and stigmas, and seed yield of five female single crosses and five male inbred lines were recorded for different combinations of four planting densities and four sowing dates in Mexico. The effect of planting density was not significant. The male inbred line T10 was the earliest and highest seed yield and T31 the latest, occupying second place in yield. The single crosses T32/T10 and T13/T14 were the earliest and had the highest effective seed yield. At the earliest sowing date, the females were later in their flowering, accumulated fewer growing degree days (GDD), and obtained higher yields since the grain-filling period coincided with hot days and cool nights. To achieve greater floral synchronization and therefore greater production of hybrid seed, differential planting dates for parents are recommended based on information from the accumulated GDD of each parent. The three-way cross hybrids were classified according to the expected seed yield of the females and the complexity in the synchronization of flowering of their parents.

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Section: Relationship Between Sowing Dates Growing Degree Days Flormentioning

confidence: 88%

Section: Hybrid Seed Production 321 Floral Synchronization In Hybrmentioning

confidence: 99%

Section: Hybrid Seed Production 321 Floral Synchronization In Hybrmentioning

confidence: 99%

Section: Hybrid Seed Production 321 Floral Synchronization In Hybrmentioning

confidence: 99%

mentioning

confidence: 99%

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Effective Seed Yield and Flowering Synchrony of Parents of CIMMYT Three-Way-Cross Tropical Maize Hybrids

et al. 2021

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Mecanismos asociados con la modificación del endospermo en maíz de calidad proteínica

González-Núñez,

Pineda-Hidalgo,

Salazar-Salas

et al. 2023

BIOTECNIA

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Protein quality maize (QPM) combines the protein quality of the opaque-2 (o2) mutant with a vitreous endosperm. These characteristics have allowed breeding programs worldwide to produce QPM genotypes that help alleviate malnutrition of people in developing countries from Africa, Asia and Latin America with a cereal-based diet. However, the development of these materials has been inefficient due to the limited knowledge about the molecular basis of the conversion of the soft o2 endosperm into a vitreous phenotype in QPM. This conversion has been associated with an increase in small protein bodies rich in 27 kDa γ-zein, the synthesis of starch with a higher proportion of amylose and short-intermediate amylopectin chain branches that favors the compaction of the starch granules, as well as alterations in the amyloplast envelope that favors the interaction between starch granules and protein bodies. Additional studies about the mechanisms involved in the modification of the endosperm in QPM will contribute to produce materials with good agronomic characteristics and protein quality.

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Efecto del ciclo de producción sobre el potencial de rendimiento y calidad nutricional del maíz forrajero en la Comarca Lagunera

Granados-Niño

Duarte

Martínez

et al. 2022

Remexca

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El objetivo de este estudio fue evaluar el efecto del ciclo de producción sobre el potencial de rendimiento y calidad nutricional del maíz forrajero en la Comarca Lagunera. El experimento se estableció en el Campo Experimental-INIFAP. Se utilizó el híbrido de maíz SB-302 en los ciclos agrícolas de primavera y verano bajo un diseño de bloques completamente al azar con cuatro repeticiones durante 2018, 2020 y 2021. La información se analizó con el PROC MIXED de SAS usando el ciclo agrícola como un efecto fijo y el año como efecto aleatorio. Se evaluaron los rendimientos de forraje verde (RFV) y seco (RFS), materia seca (MS), proteína cruda (PC), fibra ácido detergente (FDA), fibra neutro detergente (FDN), digestibilidad in vitro de la FDN a las 30 horas de incubación (DFDN-30 h), energía neta de lactancia (ENL), almidón y lignina, producción potencial de leche por tonelada y por hectárea y rendimientos de FDN, DFDN-30 h y ENL, almidón y lignina. El RFV y RFS fueron mayores en primavera que en verano por 8.8 y 3.7 t ha-1, respectivamente. El ciclo de producción no afectó la MS, FDN, ENL, almidón y lignina. Sin embargo, para el ciclo de primavera los contenidos PC, FDA y DFDN-30 h fueron mayores que en el verano con 0.57, 1.98 y 7.87%, respectivamente. Además, la producción potencial de leche por tonelada y los rendimientos de FDN, DFDN-30 h y ENL fueron superiores en primavera que en verano. En general, el maíz sembrado en primavera presentó mayores rendimientos de forraje por hectárea y mejor digestibilidad de la fibra que el maíz sembrado en verano en la Comarca Lagunera.

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Fenología, Crecimiento Y Sincronía Floral De Los Progenitores Del Híbrido De Maíz QPM H-374c

Cited by 5 publications

References 17 publications

Effective Seed Yield and Flowering Synchrony of Parents of CIMMYT Three-Way-Cross Tropical Maize Hybrids

Effective Seed Yield and Flowering Synchrony of Parents of CIMMYT Three-Way-Cross Tropical Maize Hybrids

Mecanismos asociados con la modificación del endospermo en maíz de calidad proteínica

Efecto del ciclo de producción sobre el potencial de rendimiento y calidad nutricional del maíz forrajero en la Comarca Lagunera

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