Showing papers by "Pedro Revilla published in 2006"
TL;DR: This research was supported by the National Plan for Research and Development of Spain (AGL2000-00944 and AGL2004-06776-C02/ AGR) and the Excma.
Abstract: This research was supported by the National Plan for Research and
Development of Spain (AGL2000-00944 and AGL2004-06776-C02/
AGR) and the Excma. Diputacion Provincial de Pontevedra, Spain. V.
M. Rodriguez and B. Ordas received fellowships from the Ministry of
Science and Technology of Spain.
21 citations
TL;DR: Study of the adaptation of a set of 10 flint varieties crossed to flint and dent testers and in a diallel design to check the feasibility of a breeding program to obtain flint hybrids well adapted to European Atlantic conditions found variety and heterosis effects were significant for all traits.
Abstract: Pilar Soengas and Bernardo Ordas acknowledge a fellowship
from the Xunta de Galicia and from the Ministry of Sciences
and Technology of Spain, respectively. Work was done
thanks to Project Cod. AGL01-3946 of the Ministry of Sciences
and Technology and Excma. Diputacion Provincial de
Pontevedra, Spain.
19 citations
14 citations
TL;DR: There was variability for earliness, vigor and cold tolerance among the populations and crosses involved in this study, being tolerant to cold conditions the populations with medium growing cycle originated in areas with short growing seasons.
Abstract: Early vigor, earliness and cold tolerance are the main potential contributions of European maize (Zea mays L.) for breeding programs for adaptation to areas with short growing seasons and cold springs. The objective of this research was to determine the potential contributions of populations from different European regions to breeding for adaptation. Six Spanish and six French maize populations differing on variability for earliness, vigor and cold tolerance were crossed in a complete diallel without reciprocals. The populations and their crosses were evaluated in the field and in a cold chamber. Minimum temperatures were the main environmental trait affecting genotype × environment interaction, probably due to the cold sensitivity of the genotypes with the best performance in the field. The best population cross, based on specific heterosis for adaptation-related traits in the field, was Viana × Rastrojero, but this cross was cold sensitive. Tuy × Lazcano should be the best choice for a breeding program for adaptation, based on performance in the field and cold tolerance. As conclusions, there was variability for earliness, vigor and cold tolerance among the populations and crosses involved in this study, being tolerant to cold conditions the populations with medium growing cycle originated in areas with short growing seasons. The highest yielding crosses were cold sensitive.
12 citations
TL;DR: Investigation of changes in germination and vigour in maize (Zea mays L.) inbred lines during cold storage in an active collection suggested natural selection for viability and vigours during storage within inbreeding lines.
Abstract: Genotypes conserved in active collections may suffer genetic erosion and modifications. The objective of this work was to investigate changes in germination and vigour in maize (Zea mays L.) inbred lines during cold storage in an active collection. Seeds of 16 maize inbreds produced along 16 years were evaluated for emergence and seedling vigour in a growth chamber. Linear and quadratic regressions of vigour and viability-related traits over seed age were calculated and tested for homogeneity. The seed of five production years of five inbreds that behaved differently in the regression analysis was multiplied in 1998, and original and renewed seed were evaluated in a growth chamber in 1999. Viability and vigour decreased linearly with age for most inbreds, particularly for B84 and EP10, varied at random for a few inbreds, and remained high for EP56 and A295. Aging caused reduction of vigour and loss of viability in most inbreds. There was variability for seed longevity among inbred lines; longevity was highest for inbred EP56. During storage, some seeds of each inbred died, while enduring seeds, when multiplied, produced new seed with enhanced viability and vigour compared to the average seed of the inbred, suggesting natural selection for viability and vigour during storage within inbred lines.
10 citations