FLOWERING PHENOLOGY OF THE SIBERIAN STONE PINE(PINUS SIBIRICA DU TOUR), JAPANESE STONE PINE (PINUS PUMILA (PALL.)REGEL.) AND THEIR HYBRIDS | Vestnik Tomskogo gosudarstvennogo universiteta. Biologiya - Tomsk State University Journal of Biology. 2010. № 1 (9).

FLOWERING PHENOLOGY OF THE SIBERIAN STONE PINE(PINUS SIBIRICA DU TOUR), JAPANESE STONE PINE (PINUS PUMILA (PALL.)REGEL.) AND THEIR HYBRIDS

Male and female cones development was studied to assess an opportunity of phenological isolation of hybrids between Siberian stone pine and Japanese stone pine from their parental species. Subject was vegetative progeny of Siberian stone pine, Japanese stone pine and hybrids grown under the same plantation conditions. Phenological observations were carried out from 2005 to 2007 y. during the whole flowering period. The development of Siberian stone pine female cones has three main stages, namelycompact bud, flower bud and open cone. Eight phenological phases that characterized by physiological and morphological changes and receptivity to pollen were observed during open cone stage. Times of pollination start, peak and finish were registered. Flowering period continued about 10-15 days. Species have significantly different times of phenological phases and hybrids were intermediate. There is range of phenological phase times within each species and hybrids. All female cone phenological phases of Siberian stone pine started on average 5 days earlier than those of Japanese stone pine. Although hybrids were intermediate between species they were obviously close to Japanese stone pine. Phenological phases of hybrids and Japanese stone pine partially overlapped during almost whole flowering period. Time interval between receptivity phases of Siberian stone pine and hybrids was on average 4 days. Time interval between pollen release peak of Siberian stone pine and hybrids was 2-3 days. There is no complete phenological isolation both between hybrids and parental species and between parental species. Nevertheless, the opportunity of reproductive isolation due to another inner ways is not excluded.

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Keywords

flowering phenology, natural hybrids, Japanese stone pine, Pinus pumila, Pinus sibirica, Siberian stone pine, фенология цветения, естественные гибриды, кедровый стланик, кедр сибирский

Authors

NameOrganizationE-mail
Vasilieva Galina V.Institute for Monitoring of Climatical and Ecological Systems SB PASGalina_biology@mail.ru
Zhuk Eugenia A.Institute for Monitoring of Climatical and Ecological Systems SB PASkuznetsova_ev@sibmail.com
Popov Aleksandr G.Institute for Monitoring of Climatical and Ecological Systems SB PASpopovaleksa@yandex.ru
Всего: 3

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 FLOWERING PHENOLOGY OF THE SIBERIAN STONE PINE<i>(PINUS SIBIRICA </i>DU TOUR), JAPANESE STONE PINE <i>(PINUS PUMILA </i>(PALL.)REGEL.) AND THEIR HYBRIDS | Vestnik Tomskogo gosudarstvennogo universiteta. Biologiya - Tomsk State University Journal of Biology. 2010. № 1 (9).

FLOWERING PHENOLOGY OF THE SIBERIAN STONE PINE(PINUS SIBIRICA DU TOUR), JAPANESE STONE PINE (PINUS PUMILA (PALL.)REGEL.) AND THEIR HYBRIDS | Vestnik Tomskogo gosudarstvennogo universiteta. Biologiya - Tomsk State University Journal of Biology. 2010. № 1 (9).

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