Projects / Programmes
Kombinacijske sposobnosti genotipov koruze iz genske banke na gospodarsko pomembne lastnosti (Slovene)
| Code |
Science |
Field |
Subfield |
| 4.03.00 |
Biotechnical sciences |
Plant production |
|
| Code |
Science |
Field |
| 4.01 |
Agricultural and Veterinary Sciences |
Agriculture, Forestry and Fisheries |
Researchers (9)
Organisations (1)
Significance for science
Investigation of combining ability based on diallel crosses are widespread in testing the value of breeding materials. On this way, the breeders sistematically evaluate and cross some genotypes. Because of the large number genotypes, that the breeders have on available, the first step of evaluating is the investigation the general combining ability (GCA) using testers. The good testers is much requested on the breeders area. Information about GCA is the rather real good evaluation of the genotypes. Only the genotypes with good GCA are suitable for further successful breeding. In maize, where the F1 hybrids are using as cultivars, the knowledge about GCA of inbreds is very important. Results of our project will contribute to better knowledge of gene material in maize gene bank at Biotechnical Faculty in Ljubljana, knowledge of additive and non-additive genetic variance and relationship betwen GCA and specific combining ability (SCA) of investigaetd traits. On the other hand, in our project are included the traits, important for better quality grain (tolerance to fungus Fusarium, which release mycotoxins), photosynthesis (FA) and water use efficiency (WUE). WUE is very important under drought conditions. Only on 2-years field experiments and only 15 inbreds of our maize gene bank (10 inbreds as female parents and 5 inbreds as male parents), which we used for developing 50 new maize hybrids; for almost all investigated traits the significant differences for GCA and SCA were found. Some inbreds shown the good GCA for several traits, some hybrids shown good SCA fo yield, also the better hybrid for WUE express the 8,7 µmol CO2 mol-1 H2O, that is the more than data cited in literature (3–5 µmol CO2 mol-1 H2O). Our results confirmed the hypothesis that in our maize gene bank exist some good materials, which will be as stimulation fur further investigation in this direction.
Significance for the country
In maize gene bank of Biotechnical Faculty in Ljubljana, which is included in national program »Slovenian plant gene bank«, the more than 580 genotypes, were stored. Almost half ot them are the inbreds. Most of them are rather homozigous, which could be ready for developing the new cultivars as F1 hybrids. This is the very simple way, but for developing inbreds, the many generations (up to 10) of selfing and careful selection is needed. The main aim of work on the gene bank is only the maintaining and characterisation of gene bank material, but not for investigation for other agronomic or breeders purpose. Results of our project could be contribute small, but important part to systematical investigation of domestic maize gene bank material, special the combining ability (CA) for important agronomic traits. Investigation the CA of inbreds, which in Slovenia at least the last 40 years have not been investigated, is only the contribution to theoretical knowledge and base for further successful breeding and developing of new cultivar. Although in Slovenia, the maize is the most important field crops, only the introduced maize hybrids are sowing. One of the reasons is none financial support for maize breeding Slovenian for last 20 years. Although, the main aim of our project have been the investigation CA of domestic maize gene material, in our experiments also the 6 official standards (foreign hybrids) were included. Some of the new hybrids have the significant equal yield as standards, but according to tolerance to Fusarium subglutinans some new hybrids are better than standards. Almost all new hybrids have also the flint or semiflint type of kernel, but the standards have dent or semident type of kernel. For the entering on the Official variety list, only the 2-years testing on one location is not enough, however the further investigation of the best genotypes is needed.
Most important scientific results
Annual report
2011,
final report,
complete report on dLib.si
Most important socioeconomically and culturally relevant results
Annual report
2011,
final report,
complete report on dLib.si
