Variation in Photosynthetic Traits and Correlation with Growth in Teak (Tectona grandis Linn.) Clones

Abstract

In order to interpret the patterns of genetic variation of photosynthesis and the relationships with growth traits within gene resources of teak (Tectona grandis Linn.), gas exchange, and chlorophyll fluorescence parameters, growth traits of plants in nursery and field trials were measured for 20 teak clones originated from different countries. The results show that there was abundant genetic variation in gas exchange, chlorophyll fluorescence, and growth among the teak clones. The measured traits were found to have generally high heritability (h2) except for intercellular concentration of carbon dioxide (CO2) (Ci). The net photosynthetic rate (Pn), seedling height, and individual volume of wood were significantly correlated with each other, and seedling height was significantly correlated with plant height in field trials, suggesting that Pn and seedling height can be useful in teak breeding. Teak clones 7029, 71-5, 7219, 7412, and 7122, and provenances 3070, 3074, and 3071 had higher photosynthetic rates, and can be regarded as a key resource in teak improvement programs. This work provides useful information for teak breeding and germplasm resource management.

Analysis of Chemical Composition of Extractives by Acetone and the Chromatic Aberration of Teak (Tectona Grandis L.F.) from China

“…To provide basic information for the wood industry, the physical and mechanical properties and compositions of teak have been analyzed by many researchers [4,5,6,7]. A lot of research has been done into the breeding, plantations and growth of teak so as to develop high productivity and quality varieties [8]. Abundant genetic variation in photosynthetic traits and growth among the teak clones, relations between trace element in cultivated soil or bent sections and properties were obtained [9,10], for instance.…”

MORPHOLOGICAL DESCRIPTORS FOR THE CHARACTERISATION OF TEAK CLONES CUTTINGS (Tectona grandis L.F.)

“…In breeding programs, genotypes with similar morphological traits experience fewer benefi ts that result from the combination and genetic gain (Chimello et al, 2017;Prasetyo et al, 2020) when compared to phenotypically divergent genotypes (Alcântara and Veasey, 2013;Chimello et al, 2017;Flôres Junior et al, 2018). Therefore, in potential future breeding programs, it is important to consider the dissimilarity of genotypes to obtain higher genetic gains per generation (Chawhaan et al, 2003;Vasudeva et al, 2004;Chaudhari et al, 2018;Huang et al, 2019).…”

Development of Morphological Descriptors For Characterization of Teak (Tectona Grandis L. f.) Seed Sources In India

“…In breeding programs, genotypes with similar morphological caharcteristics experience fewer bene ts that result from the combination and genetic gain (Prasetyo et al, 2020) when compared to phenotypically diverse genotypes (Flôres Junior et al, 2018). Hence, it is essential to envisage the dissimilarity of genotypes to obtain higher genetic gains (Huang et al, 2019).…”

“…Leaf morphological traits evaluated in teak seed sources S.No. Characteristics Levels of Expression ,3,4,5, 6,7, 8,9,10,11,12,13,14,15, 16,17, 18,19,20,21,22,23,24,25, 26,27, 28,29, 30 …”