Achievements

Project title:  Population genetics and phylogeography of Pterocarpus santalinus L.f., and itsex situ conservation through biotechnological interventions (2010-2013).

 

Objectives:

 

Short term

  • To study genetic diversity and differentiation in the natural, endemic populations of Pterocarpus santalinus L.f.

  • To study genetic relationships (phylogeography) among the natural populations of Pterocarpus santalinus L.f.

  • To conserve (ex situ) germplasm of Pterocarpus santalinus L.f, including genotypes having wavy grained heart wood, by way of establishing germplasm bank.

Long term

  • To assess genetic diversity and differentiation in Pterocarpus santalinus L.f., and develop strategies for its conservation and management.

Achievements

The study undertaken to assess diversity and structure present in the natural populations of Redsanders using chloroplast DNA markers revealed the following.

  • The total diversity in haploid genome was Ht = 0.718.

  • The within population diversity was Hs = 0.137.

  •  Most of the diversity was attributed to among population diversity (Dst.=0.581)

  •  A strong geographic structure (Fst = 0.809) was detected among the studied populations.

  •  The study detected six distinct haplotypes.

  • A germplasm bank was established containing five hundred germplasm.

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Project title: Molecular assessment of breeding patterns in clonal seed orchards of teak in Andhra Pradesh(2011-14).

 

Objectives

Short term

  • To assess clonal variation in reproductive phenology.

  • To assess clonal variation in mating pattern.

  • To assess clonal variation in pollen movement (Gene flow).

  • To assess the extent of pollen contamination.

Long term

  • To devise strategies for increasing cross pollination and genetic gains in teak seed orchards.

Achievements:

  • Out of the 105 progenies analyzed, paternity could be assigned to 61 progenies with 95% confidence level. Twenty-two progenies (20.9%) could not be assigned to any candidate fathers.

  • Out of the 61 progenies for which paternity could be established with 95% confidence, only four progenies were selfed (6.6%) and rest was the result of cross-fertilization (93.4%).

  • Out of the thirty clones planted in the CSO, 23 clones participated in the breeding process. There was variation in reproductive success of pollen parents. Clone 8 was found to be the most successful pollinator followed by Clone 16 and clone 18.

  •  The number of pollen donors varied from 10 to 14 with an average of 11.4 pollen donors per seed tree

  • The average pollen dispersal distance varied from 84.059.5 m (SD) to 153.452.9 m (SD), with an overall average of 104.954.6 m (SD).

  • Most of the pollen donors (75.4%) were beyond 50 m of the seed trees, whereas, only 18.0% pollen donors were within 50 m from the seed trees.

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Project title: Phytosociological studies in the dry Red sanders bearing areas of Eastern Ghats, Andhra Pradesh.

 

Objectives:

  • To quantitatively assess the present day composition and structure of vegetation in the dry Red sanders (Pterocarpus santalinus L.f.) bearing forest areas of Eastern Ghats, Andhra Pradesh.

Achievements:

 

The quantitative assessment of the vegetation composition and structure in the dry Red sanders (Pterocarpus santalinus L. f.) bearing forest areas of Eastern Ghats, Andhra Pradesh revealed the following.

  1. The species richness across study sites ranged from 5 to 20. Altogether 40 species belonging to 21 families were enumerated.

  2. The tree density across study sites ranged from 622.2 stems ha-1 to 388.9 stems ha-1 .

  3. The basal area across study sites ranged from 15.884 m2 ha-1 to 7.351 m2 ha-1 .

  4. The Shannon-Weiner Index (H') of species diversity varied from 2.765 to 1.414.

  5. Syzygium alternifolium, Anogeissus latifolia and Chloroxylon swietenia were found to be the predominant species at the study locations.

  6. In terms of IVI, the relative position of Red sanders in these communities were found to be fifth and beyond.

  7. The species distribution across diameter class showed a decreasing trend with increasing diameter class at all the sites.

  8. Red sanders was conspicuously absent from the higher diameter classes. About 87.5 % Red sanders stems across the study sites were recorded in the lowest diameter class.

  9. The observed poor regeneration of Red sanders or the lack of it, across the study sites, is correlated to the absence of seed-bearers in the community.
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Project title: Development of Agro-forestry models in Wrightia tinctoria R.Br. and Gmelina arborea Roxb. as tree species in semi-arid tropics of Andhra Pradesh, (2009-14).

 

Objectives:

Short term

  1. To develop Wtrightia tinctoria and Gmelina arborea based agroforestry models in semiarid tropics of Andhra Pradesh.

  2. To test sorghum + pigeon pea in above tree combinations.

Long term

  1. Study of interactions of tree and crop combination of agroforestry system based on Wtrightia tinctoria and Gmelina arborea in combination with pigeon pea and Sorghum.

  2. To popularize the above mentioned tree species among farmers.

Achievements:

A study to develop Agroforestry models with Wrightia tinctoria R.Br. and Gmelina arborea Roxb. as tree species in semiarid tropics of Andhra Pradesh yielded the following results.

  • The study recorded significantly higher grain and fodder yield. Grain and fodder yield of Sorghum (C43 variety) were 500 and 2104 kg/ha and that of Red gram (ICPL-85063 Laxmi variety) were 101 and 1700 kg/ha in with G. arborea at a spacing of 3m X 12m.

  • The grain and fodder yield of Sorghum were 176 and 742 kg/ha and that of Red gram were 79 and 1021 kg/ha with W. tinctoria at a spacing 5m X 12m.

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Project title: Establishment and evaluation of multi-locational trials of Melia azedarach L. and Melia dubiaCav. (Ex. M. Roem.)- Phase-II, (2011-15).

 

Objectives:

Short term

  1. To evaluate progeny trials of Melia azedarach and M. dubia established and select superior genotypes for timber yield

  2. Screen the natural population and select plus trees to increase genetic base of the breeding population

  3. To establish multi-clonal trials of Melia azedarach and M. dubia with progenies of plus trees to test for their suitability in Tamil Nadu

  4. To produce planting material form superior genotypes through vegetative propagation techniques

  5. To assess the genetic variation among progenies through morphometric traits and ISSR markers

Long term

  1. Evaluation of progeny trials of Melia azedarach and M. dubia established and select superior genotypes for timber yield and oil also

  2. To produce and supply seed and quality seedlings with superior oil and timber yields

Achievements:

A study to establish and evaluate multilocational trials of Melia azedarach L. and Melia dubia Cav. (Ex. M. Roem) yielded the following results

  • Multilocational trials was established at IFB, Hyderabad (35 Collections), Bangalore (Nallal, IWST) and Gudaluru, Chennai (65 collections).

  •  For Melia dubia at IFB, Hyderabad, PDT- 15 was superior in height and diameter followed by PDK-1 and PDA-24 (21.6 cm DBH and 7.1 m height).

  • For M. azedarach at IFB, Hyderabad, PAK-6 exhibited maximum height and diameter (4.73 m height and 75.63 cm DBH) followed by  PAK-9 with 4.63m height and PAK-3 with 63 cm DBH.

  •  The oil content in M. azedarach PAK-9 was found to be maximum (43.60%) and that in M. dubia PDT-12 was 46.0%

  • Macro and micro propagation protocols were developed for M. dubia.

variation in progeny dubia
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Project title:  Study on Impact of Podu cultivation on phytodiversity and soil factors in the Eastern Ghats of Andhra Pradesh (2010-12).

 

Objectives:

Short term

  1. To Study the regeneration of different species in Podu cultivated areas.

  2. To study physical characteristics and chemical composition of the soils in the podu cultivated areas.

  3. To study the micro-flora and micro-fauna of the soils in podu cultivated areas.

Long term

  1. To assess the impact of podu cultivation on the phytodiversity of species.

  2. To compare the phytodiversity of the podu cultivated areas with the protected forests.

Achievements:

  • During the period, podu areas in Bhdarachalam Forest Division of Khammam District, Rampachodavaram Range of Kakinada Forest Division and Palakonda Range of Srikakulam Forest Division were identified and surveyed.

  •  Altogether 12 sites were selected and the phyto-diversity was monitored in two seasons in a year.

  • Regeneration status of plant species in all the identified plots was studied and data analyzed for IVI, dominance and diversity. Soil samples were collected and analyzed at Acharya N.G. Ranga Agricultural University, Rajendranagar, Hyderabad for soil nutrient parameters.

  • This study provides information on the species diversity and regeneration potential of forest tree species (saplings and seedlings) in areas cleared for podu cultivation.

  •  In general, a relatively good diversity of seedlings and saplings of forest tree species was observed in the disturbed areas compared to that of the controls.

  • The role of measurable soil parameters could not be elucidated and be linked to the changes in species diversity in the areas cleared for podu practice.

  • Intensive podu cultivation is being done in vast areas of forest lands in the Eastern Ghats. It is strongly suggested to take appropriate measures to discourage this practice and encouraging them to take diversified agriculture methods for preventing further damages to the nature.
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