Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/63265
Type: Artigo de periódico
Title: BREEDING SYSTEMS IN COIX LACRYMA-JOBI POPULATIONS
Author: MELLO, LV
SILVA, WJ
MEDINA, HP
BALVVE, R
Abstract: Six populations of Coix lacryma-jobi with distinct characters were studied to evaluate the presence of autonomous apomixis and pseudogamy, and to determine its implications and effects in the calculations of the rate of breeding. For this reason, two types of genetic markers were used - morphological markers and isozymatic markers. The results show that autonomous apomixis does not seem to occur in these populations. Further experiments are necessary to prove the presence of pseudogamy in one of the populations. The rate of natural outcrossing in the grain types Rosario, Rosadlay and I-47 fluctuated around 35.9% using estimates based on isozymatic markers. The rate of natural outcrossing was 37.4% in the Adlay population using morphological markers. A population composed of tall individuals, named Tailandia, which has a greater vegetative mass and fewer grains, presented a high level of natural outcrossing at 72.8%. This information is important for many reasons, such as: 1) guiding sampling strategies of genetic material, 2) in the organization and upkeep of germplasm banks, and 3) for plant breeding programs.
Subject: APOMIXIS
NATURAL CROSS-BREEDING
COIX LACRYMA-JOBI
JOBS TEARS
Country: Holanda
Editor: Kluwer Academic Publ
Rights: fechado
Identifier DOI: 10.1007/BF00025436
Date Issue: 1995
Appears in Collections:Unicamp - Artigos e Outros Documentos

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