Genetic diversity and differentiation in Dalbergia sissoo (Fabaceae) as revealed by RAPD

Abstract

Dalbergia sissoo, a wind-dispersed tropical tree, is one of the most preferred timber tree species of South Asia. Genetic diversity and differentiation among natural populations of D. sissoo were examined for the first time. We found a relatively high level of genetic diversity in D. sissoo, both at the species level (percentage of polymorphic bands = 89.11%; H = 0.2730; I = 0.4180) and the population level (percentage of polymorphic bands = 68.7%; H = 0.239; I = 0.358), along with a relatively low degree of differentiation among populations (GST = 0.1311; AMOVA = 14.69%). Strong gene flow among populations was estimated, N m = 3.3125. The Mantel test suggested that genetic distances between populations were weakly correlated with geographic distances (R = 0.3702, P = 0.1236). The high level of genetic diversity, low degree of differentiation, strong gene flow, and weak correlation between genetic and geographic distances can be explained by its biological character and widespread planting. This information will be useful for the introduction, conservation and further studies of D. sissoo and related species.

Genetic Variability and Population Divergence in the Rare Fritillaria tubiformis subsp. moggridgei Rix (Liliaceae) as Revealed by RAPD Analysis

“…Patterns of high genetic diversity at both the species' and local population levels have already been documented in other mountain plants [35] and critically endangered species [36], [37], especially when relatively large populations have been considered [38]. Our findings, however, were in contrast with two studies on F. imperialis and F. camschatcensis using RAPD markers, where variation within populations accounted for only 54% and 35.7% of the total variation, respectively [32], [39].…”

Assessment of genetic structure of the endangered forest species Boswellia serrata Roxb. population in central india

“…The low level of panmictic heterozygosity (Hs) for different regions and for overall population also supports it. Like other out-crossing species (Hamrick & Godt 1989; Nybom 2004) the B. serrata Roxb also exhibited higher within-population variability than among populations but the genetic variation within the population resulted by AMOVA was found comparatively lower than those reported in other out-crossing forest species (Nybom 2004, Wang et al 2011, Ansari et al 2012). A limited gene flow in B. serrata Roxb.…”

“…However, there are few studies based on the tree species of the central Indian regions viz. Wang et al (2011) investigated the genetic diversity of D. sissoo sampled from Indian regions and found 89.11% of polymorphism, 0.27±0.16 GD and 0.41±0.23 I. Ansari et al (2012) sampled Tectona grandis L. f. from all along the central and peninsular Indian regions and found 80.30% polymorphism, 0.32 GD and 0.45 I.…”

Assessment of genetic diversity among surian Toona sinensis Roem in progenies test using random amplified polymorphic DNA markers

“…Differences in base pairs (bp) in the DNA sequence cause amplification not to be performed due to incompatibility between the primer and complementary DNA sequences. RAPD analysis can be used to determine and recognize the characteristics of genetic diversity between plant genotypes, and the genetic diversity can be seen in DNA polymorphism (Wang et al 2010). The mean genetic diversity between surian progeny (He) was categorized as moderate (0.304).…”