Weed management and tillage effect on rainfed maize production in three agro-ecologies in Mexico

Simon Fonteyne Abel Jaime Leal González Rausel Ovando Ravi Gopal Singh Nele Verhulst (2022, [Artículo])

Maize (Zea mays L.) is grown in a wide range of agro-ecological environments and production systems across Mexico. Weeds are a major constraint on maize grain yield, but knowledge regarding the best weed management methods is lacking. In many production systems, reducing tillage could lessen land degradation and production costs, but changes in tillage might require changes in weed management. This study evaluated weed dynamics and rainfed maize yield under five weed management treatments (pre-emergence herbicide, post-emergence herbicide, pre-emergence + post-emergence herbicide, manual weed control, and no control) and three tillage methods (conventional, minimum and zero tillage) in three agro-ecologically distinct regions of the state of Oaxaca, Mexico, in 2016 and 2017. In the temperate Mixteca region, weeds reduced maize grain yields by as much as 92% and the long-growing season required post-emergence weed control, which gave significantly higher yields. In the hot, humid Papaloapan region, weeds reduced maize yields up to 63% and pre-emergence weed control resulted in significantly higher yields than treatments with post-emergence control only. In the semi-arid Valles Centrales region, weeds reduced maize yields by as much as 65%, but weed management was not always effective in increasing maize yield or net profitability. The most effective weed management treatments tended to be similar for the three tillage systems at each site, although weed pressure and the potential yield reduction by weeds tended to be higher under zero tillage than minimum or conventional tillage. No single best option for weed management was found across sites or tillage systems. More research, in which non-chemical methods should not be overlooked, is thus needed to determine the most effective weed management methods for the diverse maize production systems across Mexico.

Corn Integrated Weed Management Manual Weed Control CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA MAIZE WEED CONTROL MINIMUM TILLAGE ZERO TILLAGE

Dzit bacalito y las variedades de maíz frente a transgénico

Adriana Tapia Hernández Elda Miriam Aldasoro Maya (2023, [Libro])

La historieta está dirigida a público en general con interés en la vida campesina, y particularmente a niñas y niños, honrando las reflexiones y acciones de quienes conservan y resguardan las variedades nativas de maíz, conteniendo así la dispersión transgénica en el Área de Protección de Flora y Fauna Cañón del Usumacinta (Tenosique, Tabasco; México), territorio biocultural donde convergen saberes contemporáneos de las familias tseltales, choles, chontales y mestizas y donde recientemente se confirmó la presencia de los marcadores transgénicos P35S y T-NOS.

Dzit bacal Maíz nativo Variedades del maíz Maíz transgénico Conservación del maíz Área de Protección de Flora y Fauna Cañón del Usumacinta (Tabasco, México) CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CIENCIAS AGRARIAS AGRONOMÍA DESARROLLO VEGETAL DESARROLLO VEGETAL

Genome-wide association study and genomic prediction on plant architecture traits in sweet corn and waxy corn

XUECAI ZHANG Ao Zhang (2023, [Artículo])

Genome-Wide Association Study Genomic Prediction Ear Height Tassel Branch Number Waxy Corn CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA GENOMICS PLANT HEIGHT SWEET CORN WAXY MAIZE

Pollen self-elimination CRISPR–Cas genome editing prevents transgenic pollen dispersal in maize

XUECAI ZHANG Chuanxiao Xie (2023, [Artículo])

Pollen Self-Elimination Transgenic Pollen Cas9 Gene CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA POLLEN CRISPR GENE EDITING MAIZE

Maize ZmBES1/BZR1-3 and-9 transcription factors negatively regulate drought tolerance in transgenic arabidopsis

Fuai Sun XUECAI ZHANG Haoqiang Yu (2022, [Artículo])

BZR1s CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA ARABIDOPSIS DNA BINDING PROTEINS PLANT PROTEIN TRANSCRIPTION FACTORS DROUGHT GENE EXPRESSION REGULATION GENETICS MAIZE METABOLISM TRANSGENIC PLANTS ABIOTIC STRESS

Efficacy of drought-tolerant and insect-protected transgenic TELA® maize traits in Nigeria

Yoseph Beyene (2023, [Artículo])

Stem Borer TELA® Hybrids CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA FALL ARMYWORMS GENOTYPE ENVIRONMENT INTERACTION STEM EATING INSECTS TRANSGENIC PLANTS MAIZE HYBRIDS

Combination of linkage and association mapping with genomic prediction to infer QTL regions associated with gray leaf spot and northern corn leaf blight resistance in tropical maize

David Berger Yoseph Beyene Collins Juma Suresh L.M. Manje Gowda (2023, [Artículo])

Gray Leaf Spot Northern Corn Leaf Blight CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA MAIZE LEAF SPOTS QUANTITATIVE TRAIT LOCI ASSOCIATION MAPPING GENOME-WIDE ASSOCIATION STUDIES