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Marco A. Yáñez

Bio: Marco A. Yáñez is an academic researcher from University of Talca. The author has contributed to research in topics: Biology & Germination. The author has an hindex of 5, co-authored 27 publications receiving 139 citations. Previous affiliations of Marco A. Yáñez include Virginia Tech & University of Concepción.

Papers
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Journal ArticleDOI
TL;DR: L'evolution en fonction of l'age cambial de the variabilite genetique de composantes de la densite du bois dans un test de descendances de pin radiata dans le sud du Chili isabelle.
Abstract: Variabilite genetique de composantes de la densite du bois dans un test de descendances de pin radiata dans le sud du Chili. Cet article decrit l'evolution en fonction de l'age cambial de la variabilite genetique de composantes de la densite intra-cerne et des relations entre ces caracteres et des composantes de la surface des cernes. Des echantillons de bois appartenant a 31 familles de demi-freres de pin radiata ont ete soumis a une procedure d'analyse microdensitometrique. Les caracteres etudies sont la densite du bois initial (ED) et du bois final (LD), la surface du bois initial (EA) et du bois final (LA) et la proportion de bois final dans le cerne. Entre les cernes 2 a 5 (bois juvenile) et les cernes 11 a 14 (bois adulte), les valeurs estimees d'heritabilite suggerent qu'il est possible d'augmenter ED genetiquement. Une selection pour une augmentation de ED entrainerait une diminution phenotypique de EA dans le bois juvenile et le bois adulte. Dans la region de transition representee par les cernes 6 a 10, les estimations de l'heritabilite montrent peu de variabilite genetique. Des tentatives d'augmenter genetiquement la densite de ED pourraient ne pas avoir d'effet significatif sur LD, meme si ce caractere est lui-meme moyennement genetiquement controle dans cette zone. Toute modification de ED et LD aurait des effets changeants sur EA et LA en raison des variations de la valeur des covariances genetiques.

26 citations

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TL;DR: In this paper, the authors used a split-plot experimental design with two levels of fertilizer application (fertilizer versus control) and the split plot factor being 25 clones.

25 citations

Journal ArticleDOI
TL;DR: In this article, the effect of meteorological variables on respirable particulate matter (PM) of the main cities in the central-south valley of Chile during the cold season (May to August) between 2014 and 2016 was assessed.

20 citations

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TL;DR: Traits measured during the first growing season are stable indicators of clonal performance in SRC systems, and age-to-age genetic correlations indicate high clonal stability over time.
Abstract: Short-rotation coppice (SRC) using hybrid poplars for biomass production may be a productive alternative in Mediterranean zones. However, the degree of genetic control and the growth stability of poplar clones in high-density plantations remain unknown, and information is needed to reduce the selection time in SRC systems. The genetic variation and stability of growth traits with the age of hybrid clones (from interspecific crosses of Populus deltoides [D], P. trichocarpa [T], P. nigra [N] and P. maximowiczii [M]) were investigated under two planting densities (5000 and 10000 trees ha−1). The basal diameter and height of dominant shoots were measured at ages 1, 2 and 4 years. The total above-ground fresh weight of individual trees was also measured as an indicator of cumulative biomass at age 4 years. Clonal performance was not significantly changed by the planting density. Repeatability increased slightly from age 1 (0.58) to age 2 (0.65) but decreased by age 4 years (0.33). The highest clonal repeatability (0.54) value for above-ground fresh weight was observed for the T✕D cross, whereas the minimum value (0.27) was obtained when genotypes of all crosses were pooled. The age-to-age genetic correlations indicate high clonal stability over time. With respect to the complexities and time required for screening a large number of genotypes under SRC, the results of this study indicate that traits measured during the first growing season are stable indicators of clonal performance in SRC systems.

18 citations

Journal ArticleDOI
TL;DR: The results suggest that the crown development of varieties is plastic, allowing them to respond to environmental conditions and management practices, which may have a significant impact on the operational gains expected for varietal forestry.

14 citations


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01 Jan 2016
TL;DR: The fundamental concepts in the design of experiments is universally compatible with any devices to read and an online access to it is set as public so you can get it instantly.
Abstract: fundamental concepts in the design of experiments is available in our digital library an online access to it is set as public so you can get it instantly. Our digital library saves in multiple locations, allowing you to get the most less latency time to download any of our books like this one. Merely said, the fundamental concepts in the design of experiments is universally compatible with any devices to read.

446 citations

Journal ArticleDOI
TL;DR: Several contrasting growth-structure correlations are reviewed and linked to forest processes by considering the different types of tree interactions they are associated with and the implications for selecting which structural variables to use and when scaling up to the stand level are discussed.

135 citations

Journal ArticleDOI
TL;DR: Wood could be used for the selection of genotypes with a desirable plasticity and resistance to drought induced-cavitation, and surviving trees have a significantly higher mean stem density and growth at tree level and at tree ring level.

91 citations