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Reproductive Ecology of Male and Female Strobili and Mating System in Two Different Populations of Pinus roxburghii
Joint Authors
Sharma, Chandra Mohan
Khanduri, Vinod Prasad
Ghildiyal, Sunil Kumar
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-04-30
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Medicine
Information Technology and Computer Science
Abstract EN
We studied several flowering traits, namely, male-female cone phenology, male-female cone production per tree, mating system, sex ratio, air-borne pollen grains and pollen migration, over four successive years in two different natural populations of P.
roxburghii from Garhwal Himalaya, India.
Assessment of each trait mentioned except pollen dispersion was done by selecting five representative trees randomly in each population.
The pollen migration was studied on naturally isolated source trees.
The pollen trapping was done in all directions up to 2.5 km.
The average reproductive period in P.
roxburghii was 36 days with 3–5 days protandry.
There were significant year and population effects for male and female cone output and pollen grains production per tree.
In mass production year (1999), an average production of pollen cone per tree was estimated as 42.44±8.32×103 at lower altitude and 28.1±0.89×103 at higher altitude.
The controlled pollination results in high level of outcrossing with 90% seed setting.
We conclude that the high male-female ratio and tremendous pollen production capacity in P.
roxburghii indicate high male competition among trees within populations.
The isolation strip of 600 m is considered minimal for the management of seed orchard.
American Psychological Association (APA)
Sharma, Chandra Mohan& Khanduri, Vinod Prasad& Ghildiyal, Sunil Kumar. 2012. Reproductive Ecology of Male and Female Strobili and Mating System in Two Different Populations of Pinus roxburghii. The Scientific World Journal،Vol. 2012, no. 2012, pp.1-13.
https://search.emarefa.net/detail/BIM-459190
Modern Language Association (MLA)
Sharma, Chandra Mohan…[et al.]. Reproductive Ecology of Male and Female Strobili and Mating System in Two Different Populations of Pinus roxburghii. The Scientific World Journal No. 2012 (2012), pp.1-13.
https://search.emarefa.net/detail/BIM-459190
American Medical Association (AMA)
Sharma, Chandra Mohan& Khanduri, Vinod Prasad& Ghildiyal, Sunil Kumar. Reproductive Ecology of Male and Female Strobili and Mating System in Two Different Populations of Pinus roxburghii. The Scientific World Journal. 2012. Vol. 2012, no. 2012, pp.1-13.
https://search.emarefa.net/detail/BIM-459190
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-459190