Growth and heritability estimates among clones of Dalbergia sissoo Roxb. in a clonal seed orchard

Abstract

The study of genetic variability is a prerequisite for any tree improvement program. Screening of clones showing the effect of dominance in growth and tree form is essential to identify productive clones, matched to sites. Our study performed in a clonal seed orchard at Lacchiwala of India, represented by 31 clones of Dalbergia sissoo (Shisham) Roxb. from diverse locations revealed signifi cant variability at the 0.1% level of signifi cance in various morphological traits. At the age of 13 years, clone 196 (Gonda) revealed maximum height of 20.2 m and a girth at breast height of 74.2 cm. The fi ve identifi ed clones viz. 196, 198, 192, 123 and 235 were well adapted to the climatic conditions of this zone, hence survived well and showed good performance compared to other clones. Heritability estimates of 87%, 83% and 80% for height, crown width and crown length respectively coupled with high genetic gains indicated strong genetic control of these variables. A correlation matrix of various growth attributes revealed positive correlation among these attributes. On the basis of the entire set of growth variables, the clones were grouped into two major clusters with three subgroups.

Genetic Diversity and Structure of Terminalia bellerica (Gaertn. Roxb.) Population in India as Revealed by Genetic Analysis

“…This could be attributed to its remarkable growth and volume, potentially explaining its exceptional performance. The current investigation is supported by prior evidence showing variation in leaf features and their correlation to production in various plant species such as Toona ciliata [33], N. cadamba [34,35], Ficus carica [36], Acacia species [7], Pongamia pinnata [37], Aquilaria malaccensis [29], Poplar [38], Dalbergia sissoo [27], and Acacia catechu [39].…”

“…The progenies, specifically FCRITB03, FCRITB10, FCRITB16, and FCRITB17 displayed significantly higher measurements in various biometric characteristics including height, basal diameter, leaf length, leaf width, and leaf area. The outcomes are consistent with Neolamarckia cadamba , Casuarina clones, Ailanthus excelsa , Santalum album , Dalbergia sissoo , Pongamia pinnata , Acacia species, Salix species, Aquilaria malaccensis , Melia azedarach , Leucaena leucocephala , and Toona ciliata [ 7 , 9 , 11 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. Furthermore, the comparable height observed in FCRITB16 and FCRITB17 can be attributed to the similarity in weather parameters, with both provincesprovinces experiencing an average temperature of 17.3 °C and annual rainfall of 2036 mm.…”

Early Field Performance and Genetic Variation of Dalbergia tonkinensis, a Valuable Rosewood in Vietnam

“…The theoretical genetic gain (R Y ) of height and diameter at breast height were 25.7%-40.0% and 36.5%-71.2%, respectively, indicating good potential for the selection of D. tonkinensis clones from these trials. In D. sissoo, five clones with good growth performance had heritability estimates of 87%, 83% and 80% for height, crown width and crown length, respectively [35]. In this study, the individual heritability ( ĥ2 ) of height and diameter at breast height of D. tonkinensis at age 3 years were 0.33-0.39 and 0.48-0.49, respectively.…”