Vigour

Heydecker, W.

doi:10.1007/978-94-009-5685-8_8

Cited by 57 publications

(26 citation statements)

References 47 publications

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“…No matter how sophisticated the breeding techniques, the largest, cheapest and fastest gains in most forestry improvement programmes will accrue if use of suitable species and seed sources within species is assured (Zobel and Talbert, 1984). Seeds were much influenced by their place of origin (Heydecker, 1972) especially due to environmental variation in latitude, altitude, rainfall, temperature, moisture, soil and the external factors (Holzer, 1965). The seed source variations were reported on many tree species (Shivakumar and Banerjee, 1986;Murthy, 1989;Masilamani and Dharmalingam, 1999) and were dictated by environmental and edaphic factors.…”

Section: Resultsmentioning

confidence: 99%

Provenance variation in growth and genetic potential of Aquilaria malaccensis under nursery condition

M¹,

K²,

R³

2015

Afr. J. Biotechnol.

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Aquilaria malaccensisLam. is commonly known as Agarwood which is distributed in the Indo-malesian genus Aquilaria of family Thymelaeaceae known to produce resin-impregnated heartwood that is fragrant and highly valuable. Agarwood is reputed to be the most expensive wood in the world. Twenty two open pollinated families in A. malaccensis were selected and evaluated for growth attributes and genetic divergence. The experiment was conducted at Forest College and Research Institute, Tamil Nadu Agricultural University; Mettupalayam situated at 11° 19' N longitude, 76° 56' E latitude at 300 MSL during January -December 2010. The study indicates significant differences among the selected families for various growth attributes. Among the twenty two progenies evaluated, three progenies viz., NHJA, KHOW-1 and CHEK-1 exhibited consistent superiority over growth periods for shoot length, collar diameter and number of branches. Genetic divergence studies resulted in grouping of the selected families into six clusters which indicated the existence of adequate genetic divergence. Among the clusters, cluster VI was the largest with 9 progenies while the maximum intra clusters distance was recorded in cluster V. The intra and inter cluster distance revealed that maximum inter cluster distance was recorded between cluster IV and V which indicated the presence of wide genetic distance between A. malaccensis progenies. Among the various growth attributes, number of branches contributed maximum towards genetic divergence followed by shoot length. These two characters could act as a reliable indicator for future improvement programme in this economically important species. Genetic analysis of the progenies indicated adequate variability in the population. The phenotypic co-efficient of variation (PCV) and genotypic co-efficient of variation (GCV) estimates exhibited superiority of number of branches followed by shoot length and collar diameter. In case of shoot length, collar diameter and number of branches exhibited moderate heritability. The genetic advance was high for shoot length followed by number of branches which indicated the reliability of these two parameters for inclusion in future improvement programme.

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Section: Resultsmentioning

confidence: 99%

Provenance variation in growth and genetic potential of Aquilaria malaccensis under nursery condition

M¹,

K²,

R³

2015

Afr. J. Biotechnol.

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“…O contrário foi observado em sementes oriundas de frutos coletados 70 e 77 DAA, onde se verificou aumento progressivo na deterioração e queda no número de sementes dormentes. Nessa fase o tegumento ainda não se encontrava totalmente impermeabilizado (Lopes et al, 2005) e, com processo de envelhecimento, as sementes perderam o vigor devido a uma sé-rie de fatores como o fenômeno de alteração na integridade das membranas (Heydecker, 1972). Com a perda de integridade das membranas, ocorre maior perda de solutos.…”

Section: Figura 1 Umidade (%) De Frutos (A) E Sementes (B) Durante Aunclassified

Germinação e vigor de sementes de urucu

Lopes¹,

Lima²,

Macedo³

2008

Hortic. Bras.

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A espécie Bixa orellana L., conhecida vulgarmente como urucu, reúne plantas perenes e é característica da floresta amazônica de várzea. Seu cultivo deve-se à importância econômica de suas sementes condimentares e tintoriais. O urucuzeiro pode ainda ser LOPES JC; LIMA RV; MACEDO CMP. 2008. Germinação e vigor de sementes de urucu. Horticultura Brasileira 26: 019-025. explorado como planta ornamental e para recuperação de áreas degradadas, devido à rapidez de crescimento (Lorenzi, 1998). O urucuzeiro vegeta bem em locais onde a temperatura oscila entre 24º e 27ºC, com precipitação abundante (superior a 1.200 mm anuais) e solo bem drenado. Por ser uma planta rústica, o urucuzeiro cresce bem em terrenos de fertilidade média, suportando também baixos níveis de nitrogênio, fósforo e potássio (Ramalho et al.,1988;Cavalieri, 1991). Segundo Gomes & Bruno (1992), a cultura do urucu vem 1 Parte da dissertação apresentada à UFES-CCA pelo segundo autor para obtenção do título de mestre em Produção Vegetal. Germinação e vigor de RESUMOEste trabalho foi desenvolvido com o objetivo de avaliar a germinação e o vigor de sementes de urucu (Bixa orellana L.) durante a maturação, efetuando-se amostragens 70, 77 e 84 após a antese (DAA). O estudo foi conduzido em duas etapas: na primeira utilizaram-se sementes intactas (controle) e sementes submetidas à escarificação mecânica com lixa de água n o. 100, água quente a 70ºC durante 1, 3 e 5 minutos, resfriamento a 3ºC durante sete dias, utilizando-se água destilada ou KNO 3 no substrato. Na segunda etapa foi estudada a resposta de sementes (70, 77 e 84 DAA) ao envelhecimento acelerado (42ºC e 100% de umidade relativa) por 0, 12, 24, 36, 48, 60, 72, 84 ABSTRACT Annatto seeds germination at different maturation stadiaThis research was carried out to evaluate the germination and vigor of annatto seeds (Bixa orellana L.) during maturation, collecting samples 70, 77, and 84 days after anthesis (DAA). The research consisted of two phases: first, seed samples of each harvest were submitted to different treatments: (i) mechanical scarification; (ii) thermotherapy (70 o C in water bath) for 1, 2, and 3 min; (iii) prechilling at 3ºC during seven days, using distilled water or KNO 3 solution to moist the paper towel, and untreated intact seeds (control). In the second phase, seed samples (70, 77, and 84 DAA) were submitted to accelerated aging (AA) (42ºC, 100% relative humidity) for 0, 12, 24, 36, 48, 60, 72, 84, and 96 hours. In both phases, seeds were sub sampled for evaluation. The germination of intact seeds collected 70, 77, and 84 DAA was 51, 53, and 16%, respectively, and thermotherapy was the only treatment that significantly altered it. Although hindering the germination of seeds collected 70 DAA, thermotherapy for 1 and 3 minutes enhanced germination in seeds collected 84 DAA (62 and 55%, respectively). In intact seeds, the germination rate (GR) of seeds collected 84 DAA (0.51) was significantly lower than in seeds collected 70 (1.90) and 77 DAA (2.32). However, thermotherapy signif...

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“…From the agricultural perspective it determines the seed material's future productivity, which is a complex trait conditioned genetically, physiologically and ecologically. Therefore, three types of vigour are distinguished: genetic, physiological and ecological (Heydecker, 1972;Grzesiuk and Górecki, 1981). This classification of vigour indicates its distinct sources, but these forms are inseparable, and ultimately lead to the physiological result of a genetic programme in a changing environment.…”

mentioning

confidence: 99%

Assessment of Potato Mother Tuber Vigour Using the Method of Accelerated Ageing

Rykaczewska

2013

Plant Production Science

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Vigour

Cited by 57 publications

References 47 publications

Provenance variation in growth and genetic potential of Aquilaria malaccensis under nursery condition

Provenance variation in growth and genetic potential of Aquilaria malaccensis under nursery condition

Germinação e vigor de sementes de urucu

Assessment of Potato Mother Tuber Vigour Using the Method of Accelerated Ageing

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