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Selection by seed weight improves traits related to seedling establishment in P anicum coloratum L . var. makarikariense
Author(s) -
Giordano Mabel C.,
Berone Germán D.,
Tomás María A.
Publication year - 2013
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12106
Subject(s) - biology , seedling , germination , selection (genetic algorithm) , genetic diversity , horticulture , population , dry weight , panicum , greenhouse , agronomy , botany , demography , artificial intelligence , sociology , computer science
Selection for heavy seed was implemented to overcome establishment problems in P anicum coloratum var. makarikariense . A collection covering the genetic diversity of the species available in A rgentina was used as a base population ( BP ), and two cycles of recurrent phenotypic selection to increase seed weight were performed. Seedlings, obtained from seeds from each cycle and the BP , were further evaluated in the greenhouse. An increase of 17% in mean seed weight was obtained after two cycles of recurrent selection. No differences in germination or emergence were detected among the selected materials and the BP . However, seedlings from selected materials were taller and showed higher leaf elongation rate, adventitious roots elongation rate and total growth rate than that from BP . This research also revealed that in P . coloratum var. makarikariense , more vigorous seedlings can be selected from genotypes that produce heavier seeds.