Variability for Heartwood Content in Three Commercially Important Tree Species of Peninsular India—Hardwickia binata, Pterocarpus santalinus and Santalum album

Wood is Good ◽  
2017 ◽  
pp. 117-126 ◽  
Author(s):  
A. N. Arun Kumar ◽  
Geeta Joshi ◽  
S. Manikandan
2006 ◽  
Vol 54 (1) ◽  
pp. 65 ◽  
Author(s):  
L. J. McManus ◽  
J. Sasse ◽  
C. K. Blomstedt ◽  
G. Bossinger

Mutation induction has played an integral role in the improvement of most commercially important crop species but has not been successfully applied to tree species because of their long reproductive cycles which hinder the use of the traditional seed-treatment approaches. Treatment of pollen with a chemical mutagen prior to pollination will, theoretically, allow stable, heterozygous mutant trees to be produced in a relatively short time and might facilitate mutagenesis of tree species. As the first step in testing this hypothesis, a controlled-pollination trial with chemically treated pollen was conducted in Eucalyptus globulus ssp. globulus (Labill.). Assessment of fruit, seed and seedlings from more than 500 pollinations associated mutagenic treatment of pollen with a significant reduction in seed set. Non-significant increases in capsule (fruit) abortion, the inhibition of seed germination and the incidence of aberration in seedlings were also noted. We argue that pollen treatment may be a useful means of producing Eucalyptus mutants with variation in flowering time, salinity and frost tolerance, lignification and other traits of scientific and economic importance.


2021 ◽  
Vol 78 (4) ◽  
Author(s):  
Rodolphe Bauer ◽  
Antoine Billard ◽  
Frédéric Mothe ◽  
Fleur Longuetaud ◽  
Mojtaba Houballah ◽  
...  

2021 ◽  
Vol 21 (09) ◽  
pp. 425-433
Author(s):  
Sofia P. Das ◽  
Subrat K. Swain ◽  
Lakshman Sahoo ◽  
Joy Krushna Jena ◽  
Paramananda Das

Cirrhinus mrigala (mrigal) is one of the Indian major carps widely cultured in the whole Indian subcontinent. Population genetic structure of this species from Peninsular Rivers of India is lacking. Among DNA markers, microsatellites are excellent tools to evaluate genetic variation of populations. In this study, genetic variation of six peninsular riverine mrigal populations was evaluated using seventeen microsatellite loci. In analyzing 288 samples, the number of alleles ranged from 4 to 27; observed heterozygosity from 0.595 to 1.00, expected heterozygosity from 0.586 to 0.959 and inbreeding coefficient (FIS) ranged from -0.034 to 0.02. Exact test for Hardy Weinberg disequilibrium revealed that one locus was not in equilibrium across the rivers except one. The AMOVA analysis revealed the main source of genetic variation to be within the population (94.54%) than among the populations (5.46%). The Nei’s genetic distance and structure analysis depict river Narmada and Mahi populations are different from the four east coast rivers. The overall Fst (0.05462) data showed moderate differentiation among the six populations. The results of this study provide essential information to resource recovery and help in delineating populations for fishery management. Besides, the data will provide a valuable baseline for further investigations on the geographic distribution of this commercially important fish species.


2017 ◽  
Vol 8 ◽  
Author(s):  
Sandip More ◽  
Dipak Kumar Paruya ◽  
Subir Bera

Secondary xylary characters of wood are useful to identify a wood up to its generic or specific level and thus may prove or disprove the alibi of the retailers i.e., a wood is genuine or not. In the present study, 26 wood samples were collected from the local markets of Baruipur, Sealdah and Garia in Kolkata, West Bengal. Among them, 8 were sold as ‘Sandal wood’ (Santalum album), 4 as ‘Red Sanders’ (Pterocarpus santalinus) and 14 as ‘Sal wood’ (Shorea robusta). Results indicate that xylotomical features of most of the collected ‘sandal wood’ and ‘red sander’ samples did not match with the reference Santalum album and Pterocarpus santalinus samples whereas most of the collected ‘Sal wood’ samples from furniture shops matched with the reference samples of Shorea robusta. Present study successfully indicates that xylotomical investigations of commercial wood may establish the authenticity of wood of commerce.


2020 ◽  
Vol 1218 ◽  
pp. 128484
Author(s):  
Jing Liu ◽  
Qiu-hui Zhang ◽  
Fang Ma ◽  
Shi-feng Zhang ◽  
Qun Zhou ◽  
...  

Author(s):  
Julia Juchheim ◽  
Martin Ehbrecht ◽  
Peter Schall ◽  
Christian Ammer ◽  
Dominik Seidel

Abstract The proportion of mixed-species forests is presently increasing since they are commonly seen as providing a higher level of many ecosystem goods and services than monospecific stands. This may be due to a more complex three-dimensional distribution pattern of plant elements, which has often been noted, but to date rarely been quantified. In the present study, we used terrestrial laser scanning data to analyze the relationship between tree species mixing and stand structural complexity in three regions of Germany. We examined 60 forest plots representing commercially important and typical species combinations for Central Europe. The results showed an increasing but saturating relationship between stand structural complexity and tree species diversity. Moreover, we found that as the proportion of broadleaved trees increased, the stand structural complexity of coniferous stands also increased. Our study provides evidence that the conversion of monospecific conifer stands into mixed forests with broadleaved tree species as well as mixing tree species with interspecific differences in physiological and morphological traits can promote the development of structurally more complex stand structures.


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