The research team focused on traits related to early plant development and also took into account the stability of the plant (How well does it withstand wind?) and the growth form (straight or bushy?). Landraces provide advantageous genes for crop improvement After a preliminary study, in which the researchers identified the genetic differences of individual varieties, the researchers selected three landraces for cultivation in different locations with varying climatic conditions within Europe. For this purpose, they have developed a genome-based method of identifying and making targeted use of beneficial gene resources. Professor Schön and her colleagues have been examining landrace varieties for cold tolerance characteristics. This means that it is less damaged and yield losses can be avoided. When a plant can be cultivated early in the year because it can cope with cold, it has already left its flowering period behind when temperatures are particularly high in summer. Drought and heat are the conditions most damaging to crops, such as maize, when they occur during flowering.
The early development of young plants is of particular importance in times of climate change. Genetic variation reflects different variants of a gene and can be recognized by differences in the plant's appearance.Ĭold-tolerant varieties: Are they the winners in times of climate change? Therefore, the call for landraces has recently been revived, as they are characterized by high biodiversity and are considered a natural source of new genetic variation for breeding. The question then is whether in addition to undesirable traits, beneficial traits have been lost in the course of many breeding generations. Hybrid varieties, however, carry only a small selection of traits compared to old varieties, the landraces. Thus, genetic diversity is the basic prerequisite for breeding improved crop plants. In order to breed the best variety, a kit of characteristics is needed that could be relevant both today and in the future. Hybrid varieties are developed through a specific breeding scheme and, for example are "trimmed" for high yield per hectare or low susceptibility to pests. Since the 1960s, maize has been grown in Europe's fields mainly in the form of hybrid varieties. Have good plant characteristics been lost through breeding?
A research team led by Chris-Carolin Schön, Professor of Plant Breeding at the TUM, is now presenting a solution to harness the genetic potential of old varieties, so-called landraces. Researchers around the globe are investigating whether retained samples contain genes that have been lost through breeding which could be beneficial in counteracting climate change. Are these seed banks gold mines or seed cemeteries? ( November 11, 2020) - The famous seed vault in Spitsbergen and national gene banks retain hundreds of thousands of seed samples to preserve old varieties of crop plants and the genetic diversity associated with them.