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Variability in seed traits and genetic divergence in a clonal seed orchard of dalbergia sissoo Roxb.

Journal of Forestry Research 2012年第1期23卷 109-114页

作者： Ombir singh Altaf Hussain Sofi Forest Tree Seed Laboratory Silviculture DivisionForest Research InstituteDehradun-248006India

The variations in seed and pod traits, genetic superiority and genetic divergence were evaluated for a Clonal Seed Orchard （CSO） of dalbergia sissoo Roxb. at Bithmera, India consisting of 20 clones from different agro-climatic conditions of four northern states （Uttar Pradesh, Uttarakhand, Haryana and Rajasthan）. The seeds and pods of various clones in the orchard exhibited significant variability in size, weight and other characters. Significant positive correlations were observed between seed length and seed width （p〈0.05）, seed length and sccd thickness （p〈0.01）, seed length and seed weight （p〈0.01）, seed thickness and seed weight （p〈0.01）, seed length and germination value （p〈0.05）. The ge- netic parameters for seed and pod traits also showed a wide range of variations in the orchard. Heritability values were found to be over 50 percent for most of ~e seed and pod traits. Seed weight, seed length and seed thickness showed high heritability values coupled with maximum genetic gain for these characters. Ward＇s minimum variance dendrogram of clones of D. sissoo showed three distinct clusters; cluster I was the largest with 12 better clones whereas cluster 2 and 3 consisting of seven moderate clones and one poor clone, respectively. Mean cluster values showed sufficient variation among the clusters for seed weight, germina- tion value and seed length. The possible hybridization between best clones of cluster I to the disease resistant clone of cluster 2 （resistant against deadly Gandoderma lucidum root rot disease of D. sissoo） is also suggested for further breeding programmes of the species. The deploy- ment of clone 194 （better performed and disease resistant） is also rec- ommended in future plantation programmes of D. sissoo in northern India.

关键词： clones dalbergia sissoo divergence seed traits variability

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Effects of mother tree ages, different rooting mediums, light conditions and auxin treatments on rooting behaviour of dalbergia sissoo branch cuttings

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Journal of Forestry Research 2011年第1期22卷 53-57页

作者： Bhupendra Singh Rajendra Yadav B. P. Bhatt Department of Forestry Post Box No-59 H.N.B. Garhwal University Srinagar Garhwal - 246 174 Uttarakhand India Chhattisgarh Minor Forest Produce Federation A-25 VIP Estate Khamhardih Shankar Nagar Raipur- 492 007. ICAR Research Complex for NEH Region Nagaland Centre Medziphema- 797 106 Nagaland India

dalbergia sissoo Roxb. is one of the promising multipurpose tree species of South Asia. Most of the plantations of D. sissoo from seeds are facing severe threats due to the die-back disease, which ultimately causes death of this potential tree-species within a few months. Vegetative propagation could avoid the die-back disease. Thirty mother trees of different age-groups of D. sissoo were selected for evaluating the rooting behaviour of branch cuttings from D. sissoo as influenced by auxins （IAA or IBA at 100, 200, 500 mg·L^-1）, ages of mother trees （10, 4 and 2 years old） and different environment conditions, i.e., different mediums （soil and sand） or light conditions （in shade and open condition）. The results show that application of IAA and IBA induced more numbers of cuttings （collected from 10-year-old mother trees） to root compared to control. Branch cuttings of D. sissoo collected from 10-year-old mother trees and planted in soil bed in open conditions had 100.0% of cuttings to root in IAA （100 mg·L^-1） and IBA （200 mg·L^-1） treatments. Both rooting medium （Soil and sand） influenced significantly （p〈0.05） on rooting response of branch cuttings. Soil medium was found to achieve maximum no. of branch cuttings to root, compared to sand medium.

关键词： dalbergia sissoo hormonal treatments rooting medium shading vegetative propagation branch cutting

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

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Forestry Studies in China 2011年第3期13卷 211-217页

作者： Arvind SHARMA Meena BAKSHI Division of Genetics and Tree Propagation Forest Research Institute Dehradun-248006 (Uttarakhand) India Plant Physiology Discipline Botany Division Forest Research Institute Dehradun-248006 (Uttarakhand) India

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 significant variability at the 0.1% level of significance 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 five identified 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.

关键词： clone cluster correlation dalbergia sissoo genetic gain heritability

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Vegetative propagation of dalbergia sissoo:effect of growth regulators,length,position of shoot and type of cuttings on rooting potential in stem cuttings

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Forestry Studies in China 2012年第3期14卷 187-192页

作者： Bhupendra SINGH Rajendra YADAV B.P. BHATT Department of Forestry H.N.B.Garhwal UniversitySrinagar (Garhwal)Uttarakhand 246174India Chhattisgarh Minor Forest Produce Federation A-25VIP EstateKhamhardihShankar NagarRaipur 492007India ICAR Research Complex for Eastern Region PatnaBihar 800014India

The effect of auxins （IAA or IBA at 100, 200, 500 mg.L J） on rooting and sprouting parameters differed significantly （p 〈 0.05）. Rooting and sprouting percentages were higher in some treatments while other parameters were significantly higher in other treatments. The results of the present study revealed that rooting was significantly （p 〈 0.05） affected by the length of cuttings, as well as the position of shoots and type of cuttings. On average, 86.0 per cent rooting was observed in the 30-cm long cuttings com- pared to the other two lengths of cuttings, i.e., 20 and 25 cm, irrespective of any auxin treatment. In a control set, without any auxin treatment, a maximum of 60.0% rooting was recorded in the 30-cm long cuttings and a minimum of 40.0% of the cuttings rooted in the 20-cm long cuttings. Similarly, cuttings collected from the lower and upper portions of shoots resulted in 72.5 and 52.5 per cent rooting respectively, irrespective of auxin treatments. Maximum rooting was observed in the lower portion （40.0%） of cutting com- pared to the upper portion （30.0%） in the control set without auxin treatment. Leafless branches produced maximum （72.0%） rooting compared to the leafy cuttings （35.0%）, irrespective of the auxin treatment. The leafy cuttings produces a minimum of 15.0% sprout- ing and rooting in the control set.

关键词： auxin dalbergia sissoo length position of shoots type of cuttings vegetative propagation

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Assessment of genetic diversity in dalbergia sissoo clones through RAPD profiling

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Journal of Forestry Research 2011年第3期22卷 393-397页

作者： Meena Bakshi Arvind Sharma Plant Physiology Discipline Botany Division Forest Research Institute Dehradun 248 006 INDIA

We studied the genetic polymorphism among 29 clones of shisham （dalbergia sissoo Roxb） belonging to different geographic regions using random amplified polymorphic DNA （RAPD） markers. Out of 30 primers used, only 20 primers generated polymorphism in amplified product. In total 232 bands were amplified with 20 primers, of which 192 （82%） were polymorphic with an average of 9.6 bands/primer. The resolving power （Rp） ranged from 2.14 （Primer 5） to 11.93 （Primer 4）. Primer 4 and Primer 3 possessed high Rp value. Polymorphism information content （PIC） ranged from 0.15 （Primer 5） to 0.37 （Primer 4）. Primer 4 amplified total 18 bands in 29 genotypes with PIC value of 0.37 hence; this set of primer was most informative. The similarity coefficient analysis revealed two clusters. The first cluster comprised of only 10 clones and the second major cluster comprised of 19 clones. The genetic similarity among 29 clones ranged from 25.86% （clone 10 and 235） to 100% （clone 19 and 59）, suggesting a wide genetic base in shisham clones.

关键词： clones clonal seed orchard dalbergia sissoo RAPD polymorphism information content resolving power

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Genetic diversity and relationship between cultivated clones of Dalber- gia sissoo of wide geographical origin using RAPD markers

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Journal of Forestry Research 2011年第4期22卷 507-517页

作者： H. S. Ginwal Shalini Singh Maurya Priti Chauhan Division of Genetics and Tree Propagation Forest Research Institute P.O. I.P.E Kaulagarh Road Dehradun 248195 (Uttarakhand) India

Random Amplified Polymorphic DNA （RAPD） polymor- phism was employed to assess the genetic diversity in the elite germplasm＇of dalbergia sissoo. Sixty-seven clones that are under cultivation in northern India, originated frorri six different states of India and Nepal were analyzed with 30 RAPD primers that generated a total of 342 fragments out of which 290 were polymorphic. Total genetic diversity （Ht） varied between 0.01 and 0.37, with an average of 0.19. Shannon＇s Information index （I） varied between 0102 and 0.54, with an average of 0.31. Marker attributes like Polymorphism Information Content （PIC）, Marker Index （MI） and Effective Multiplex Ratio （EMR） values were calculated to assess the discriminatory power of 30 primers used. The PIC values ranged from 0.01 to 0.37 with an average of 0.17 per primer and the EMR ranged from 0.17 to 21.00 with a mean of 8.66 across all genotypes. Closely related clones were C49 and C51 with similarity index of 0.86 while the least similar or most dissimilar clones were C14 and S-DB showing similarity index of 0.58. The UPGMA-phenogram categorized the 67 clones into six clusters based on genetic similarity and dissimilarity. The clustering of clones in relation to their geographical location has been discussed.

关键词： clones dalbergia sissoo genetic diversity polymorphic RAPD

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