KhasaValleeBousquet1995

Référence

Khasa, D.P., Vallee, G., Bousquet, J. (1995) Provenance Variation in Rooting Ability of Juvenile Stem Cuttings from Racosperma Auriculiforme and R-Mangium. Forest Science, 41(2):305-320.

Résumé

Provenance variation in rooting ability was examined in Racospemra spp. using leafy stem cuttings of II provenances of R. auriculiforme and 12 of R. mangium taken from 5-month-old ortets. The cuttings were set in a 1:1 peat moss and vermiculite mixture and were rooted in a bouturatheque propagator. The application of 0.8% indole butyric acid (IBA) hormone significantly increased (P < 0.05) number of roots per cutting, root length, root dry weight, and rooting percentage, but marginally decreased number of shoots. However, significant hormone x species interactions were noted for mean root length, root dry weight, and rooting percentage, which were greater in R. mangium than in R. auriculiforme. Hormone x provenance within species interaction was also significant for the number of roots, rooting percentage, and shoot height. The differences among provenances within species were greater when hormone treatment was used. In principal components analysis of plot means, we identified the first factor as a rooting ability index of cuttings (RAIC). We further show how this index can be used, in conjunction with field growth data, for selection of provenances, families, or genotypes that both root and perform well after outplanting. In all cases, selection appeared more efficient following hormone treatment.

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@ARTICLE { KhasaValleeBousquet1995,
    AUTHOR = { Khasa, D.P. and Vallee, G. and Bousquet, J. },
    TITLE = { Provenance Variation in Rooting Ability of Juvenile Stem Cuttings from Racosperma Auriculiforme and R-Mangium },
    JOURNAL = { Forest Science },
    YEAR = { 1995 },
    VOLUME = { 41 },
    PAGES = { 305-320 },
    NUMBER = { 2 },
    NOTE = { Times Cited: 2 Article English Cited References Count: 55 Qw921 },
    ABSTRACT = { Provenance variation in rooting ability was examined in Racospemra spp. using leafy stem cuttings of II provenances of R. auriculiforme and 12 of R. mangium taken from 5-month-old ortets. The cuttings were set in a 1:1 peat moss and vermiculite mixture and were rooted in a bouturatheque propagator. The application of 0.8% indole butyric acid (IBA) hormone significantly increased (P < 0.05) number of roots per cutting, root length, root dry weight, and rooting percentage, but marginally decreased number of shoots. However, significant hormone x species interactions were noted for mean root length, root dry weight, and rooting percentage, which were greater in R. mangium than in R. auriculiforme. Hormone x provenance within species interaction was also significant for the number of roots, rooting percentage, and shoot height. The differences among provenances within species were greater when hormone treatment was used. In principal components analysis of plot means, we identified the first factor as a rooting ability index of cuttings (RAIC). We further show how this index can be used, in conjunction with field growth data, for selection of provenances, families, or genotypes that both root and perform well after outplanting. In all cases, selection appeared more efficient following hormone treatment. },
    KEYWORDS = { acacia artificial selection clonal forestry indole butyric acid racosperma rooting ability index of cuttings simultaneous genetic gain economic weights selection propagation growth clones index tree },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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