SONGKLANAKARIN JOURNAL OF SCIENCE & TECHNOLOGY

Volume 41, No. 04, Month JULY, Year 2019, Pages 742 - 746

Pollen production and dispersion in pinus roxburghii

Vinod Prasad Khanduri

Abstract Download PDF

Pollen dispersion and frequency of flowering were studied in the natural population of Pinus roxburghii Sargent (Chir pine) at altitudes between 1600 and 1900 m above sea level in the Tehri forest division of Garhwal Himalaya. Temporal variations for pollen cone and male strobilus production were observed with a year of bumper production. An individual tree produced 14.96×1011 ± 2.64 x 1011 pollen grains with a range of variation in the population between 12.95×1011 and 19.09×1011 pollen grains. Dispersion of the pollen grains from the fringe of the forest declined sharply with distance. The results implied that a segregation barrier of 640 m would be the minimal distance for the management of a Chir-pine seed orchard at the study location.

Keywords

Chir-pine, pollen cone, gene flow, Himalaya

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