Track 4-1-2: Breeding Cultivated Forage Species for Biomass, Quality and Stress Tolerance
Description
Increase yield and yield-stability under abiotic stress conditions (cold, drought, among others) is a global challenge in the breeding of perennial forage species, due to the new climatic scenarios imposed by the global changes. The modern breeding offering tools that allow for manipulating the genotype/phenotype relationship (association mapping analysis) and to accelerate the genetic gain rates for traits with low heritability and high genotype x environment interaction. The next-generation sequencing methodologies allow for characterizing, in short time period and low cost, complex genomes as the white clover. Nowadays, modern breeding is demanding high-throughput phenotyping methodologies that allows for characterizing a high number of genotypes (> 100), in short time periods (hours), and reasonable cost (Inostroza et al., 2015). During plant growth, canopy can absorb, reflect, or transmit energy reaching the surface due to interaction of incident radiation with the plant structure and photosynthetic elements. By determining the spectral signature of canopy and leaf reflectance with a spectroradiometer, it is possible to indirectly measure agronomic and physiological traits (Hernandez et al., 2015). Indices based on reflectance at different wavelengths, known as spectral reflectance indices (SRIs), have been used for this purpose. The objective of this work was to study the relationship between dry mater (DM) production and 11 SRIs evaluated in a white clover association mapping population.
Included in
Spectral Reflectance Indices and Their Relationship with Dry Mater Production in an Association Mapping Population of White Clover
Increase yield and yield-stability under abiotic stress conditions (cold, drought, among others) is a global challenge in the breeding of perennial forage species, due to the new climatic scenarios imposed by the global changes. The modern breeding offering tools that allow for manipulating the genotype/phenotype relationship (association mapping analysis) and to accelerate the genetic gain rates for traits with low heritability and high genotype x environment interaction. The next-generation sequencing methodologies allow for characterizing, in short time period and low cost, complex genomes as the white clover. Nowadays, modern breeding is demanding high-throughput phenotyping methodologies that allows for characterizing a high number of genotypes (> 100), in short time periods (hours), and reasonable cost (Inostroza et al., 2015). During plant growth, canopy can absorb, reflect, or transmit energy reaching the surface due to interaction of incident radiation with the plant structure and photosynthetic elements. By determining the spectral signature of canopy and leaf reflectance with a spectroradiometer, it is possible to indirectly measure agronomic and physiological traits (Hernandez et al., 2015). Indices based on reflectance at different wavelengths, known as spectral reflectance indices (SRIs), have been used for this purpose. The objective of this work was to study the relationship between dry mater (DM) production and 11 SRIs evaluated in a white clover association mapping population.
