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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
27/09/2006 |
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Data da última atualização: |
21/05/2024 |
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Autoria: |
RAJORA, O. P. |
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Título: |
Pollen competition among Populus deltoides Marsh., P. nigra L. and P. maximowiczii Henry in fertilizing P. deltoides ovules and siring its seed crop. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
Sexual Plant Reproduction, Heidleberg, v. 2, n. 2, p. 90-96, 1989. |
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Idioma: |
Inglês |
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Conteúdo: |
Interspecific pollen competition among P. deltoides, P. nigra and P. maximowiczii in fertilizing P. deltoides ovules was studied by using a pollen mixture technique and evaluating isoenzymes and leaf morphology. The frequencies of F1 seedlings of different paternities in pollen-mix crosses showed highly significant departures from the 1 : 1 ratio expected if pollen selection was random. P. deltoides pollen was the most competitive. The mean percentages of F1 seedlings of P. deltoides paternity in crosses with P. deltoides + P. nigra, P. deltoides + P. maximowiczii, and P. deltoides + P. nigra + P. maximowiczii pollen mixtures were 95.0, 92.5 and 84.8%, respectively. P. maximowiczii pollen was more competitive than P. nigra pollen, which was at a selective disadvantage. An average of 83.6% of F1 progenies of the 8 crosses with P. nigra + P. maximowiczii pollen showed P. maximowiczii paternity. Also, in 4 crosses with P. deltoides + P. nigra + P. maximowiczii pollen, the relative proportion of P. deltoides X P. maximowiczii seedlings (13.4%) was higher than that of P. deltoides X P. nigra seedlings (1.8%). Pollen proportions in the pollen mixtures and pollen size did not significantly affect the competitive ability of the pollen. The relative pollen competitive ability indicated reproductive affinities among the species. |
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Palavras-Chave: |
Broadleaves; Isoenzyma; Isoenzymes; Pollen competition; Poplars; Selecao gametica; Self pollination. |
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Thesagro: |
Hibrido; Pólen. |
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Thesaurus Nal: |
biotechnology; cross pollination; forest trees; interspecific hybridization; pollination; Populus. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02244naa a2200301 a 4500
001 1278628
005 2024-05-21
008 1989 bl uuuu u00u1 u #d
100 1 $aRAJORA, O. P.
245 $aPollen competition among Populus deltoides Marsh., P. nigra L. and P. maximowiczii Henry in fertilizing P. deltoides ovules and siring its seed crop.$h[electronic resource]
260 $c1989
520 $aInterspecific pollen competition among P. deltoides, P. nigra and P. maximowiczii in fertilizing P. deltoides ovules was studied by using a pollen mixture technique and evaluating isoenzymes and leaf morphology. The frequencies of F1 seedlings of different paternities in pollen-mix crosses showed highly significant departures from the 1 : 1 ratio expected if pollen selection was random. P. deltoides pollen was the most competitive. The mean percentages of F1 seedlings of P. deltoides paternity in crosses with P. deltoides + P. nigra, P. deltoides + P. maximowiczii, and P. deltoides + P. nigra + P. maximowiczii pollen mixtures were 95.0, 92.5 and 84.8%, respectively. P. maximowiczii pollen was more competitive than P. nigra pollen, which was at a selective disadvantage. An average of 83.6% of F1 progenies of the 8 crosses with P. nigra + P. maximowiczii pollen showed P. maximowiczii paternity. Also, in 4 crosses with P. deltoides + P. nigra + P. maximowiczii pollen, the relative proportion of P. deltoides X P. maximowiczii seedlings (13.4%) was higher than that of P. deltoides X P. nigra seedlings (1.8%). Pollen proportions in the pollen mixtures and pollen size did not significantly affect the competitive ability of the pollen. The relative pollen competitive ability indicated reproductive affinities among the species.
650 $abiotechnology
650 $across pollination
650 $aforest trees
650 $ainterspecific hybridization
650 $apollination
650 $aPopulus
650 $aHibrido
650 $aPólen
653 $aBroadleaves
653 $aIsoenzyma
653 $aIsoenzymes
653 $aPollen competition
653 $aPoplars
653 $aSelecao gametica
653 $aSelf pollination
773 $tSexual Plant Reproduction, Heidleberg$gv. 2, n. 2, p. 90-96, 1989.
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Embrapa Florestas (CNPF) |
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| 1. |  | RATNAM, W.; RAJORA, O. P.; FINKELDEY, R.; ARAVANOPOULOS, F.; BOUVET, J.-M.; VAILLANCORT, R. E.; KANASHIRO, M.; FADY, B.; TOMITA, M.; VINSON, C. Genetic effects of forest management practices: Global synthesis and perspectives. Forest Ecology and Management, v. 333, p. 52-65, Dec. 2014.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
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