Dear PhotosynQ User,
Welcome to the PhotosynQ community newsletter!
We have the following study by Leite et al. (2021) as our featured project this month. This study conducted to identify the key physiological trait in popcorn plants to facilitate breeding for water use efficiency. We hope you enjoy reading our selected study and please stay safe and healthy!
Jhean Torres Leite, Antonio Teixeira do Amaral Junior, Samuel Henrique Kamphorst , Valter Jário de Lima, Divino Rosa dos Santos Junior, Kátia Fabiane Mereiros Schmitt, Yure Pequeno de Souza, Talles de Oliveira Santos, Rosimeire Barboza Bispo, Gabrielle Sousa Mafra, Eliemar Campostrini and Weverton Pereira Rodrigues
Water Use Efficiency in Popcorn (Zea mays L. var. everta): Which Physiological Traits Would Be Useful for Breeding?
Breeding for drought tolerance is one of the key priorities in corn research. The water shortage at reproductive stage can cause 20-30% yield losses in corn. Identification of key physiological traits to facilitate the selection is paramount for the success of the corn breeding programs.
Leite et al. (2021) characterized a set of popcorn inbred lines for the root phenotype in association with such physiological traits.
They used a MultispeQ to measure the maximum quantum efficiency of photosystem II.
According to Figure 1 (above):
Fv/Fm is significantly correlated with plant height, leaf area, stem diameter, stem dry weight, shoot dry weight/root dry weight ratio, crown root density, water footprint and agronomic water use efficiency under drought stress conditions.
This study highlights the correlation of MultispeQ-derived chlorophyll fluorescence parameters as biomarkers for breeding drought tolerance in crops, as well as the usefulness of MultispeQ as a phenotyping tool in crop improvement programs.