While there is a rich collection of maize germplasm from Italy, it lacks genetic resources the Aosta Valley, an isolated mountain region where landraces have been preserved in absence modern introductions. These local materials, which are still cultivated mainly at household level, can high importance and historical point view. In present study, five named, after collecting sites, Arnad, Arnad-...

Aims: High maize yields in modern well-managed agroecosystems depend on the use of elite varieties and hybrids. Unfortunately, because repeated selection at high fertilizer rates, some beneficial traits, such as interaction with arbuscular mycorrhizal fungi or release organic acid anions for phosphate mobilization attracting microorganisms, might be gradually declining genotypes. However, old f...

Abstract The threats to agrobiodiversity ultimately affect our future food security. Countries bonded national or international biodiversity conservation legislation should conserve and sustainably use their agrobiodiversity. Landraces are a key element of which is largely endangered due lack systematic conservation, partially obstacles in developing inventories may be assigned the difficulties...

Our ability to manage gene flow within traditional agroecosystems and their repercussions requires understanding the biology of crops, including farming practices' role in crop ecology. That these practices' effects on crop population genetics have not been quantified bespeaks lack of an appropriate analytical framework. We use a model that construes seed-management practices as part of a crop'...

Subsistence is one of the factors that determined the presence or migration of prehistoric human populations. At the same time, humans were largely responsible for the dissemination of important crop plants such as maize (Zea mays). Maize is the major domesticated species in the New World, with thousands of landraces that were shaped by environment and human culture. Genetic analyses of archaeo...

Despite the reduction in the price of sequencing, it remains expensive to sequence and assemble whole, complex genomes of multiple samples for population studies, particularly for large genomes like those of many crop species. Enrichment of target genome regions coupled with next generation sequencing is a cost-effective strategy to obtain sequence information for loci of interest across many i...

MAIZE EAR FASCIATION Knowledge of the genes affecting maize ear inflorescence may lead to better grain yield modeling. Maize ear fasciation, defined as abnormal flattened ears with high kernel row number, is a quantitative trait widely present in Portuguese maize landraces. MATERIAL AND METHODS Using a segregating population derived from an ear fasciation contrasting cross (consisting of 149 ...

Abstract Variation in genome size and knob heterochromatin content was explored relationship to altitudinal cline length of the vegetative cycle northern Argentina, USA Mexico landraces. It considering that decrease DNA could be an adaptation a shorter growing season result artificial selection by man. Guaraní landraces from Northeastern Argentina (NEA) show similar variation (3.81pg 7.56pg) th...