CGIAR Excellence in Breeding Platform - Plan of Work and Budget 2020

At the end of 2019, all CGIAR centers had submitted improvement plans based on an EiB template and in close collaboration with EiB staff while – in a parallel process with breeding programs, funders and private sector representatives – a vision for breeding program modernization was developed and presented to CGIAR breeding leadership at the EiB Annual Meeting. This vision represents an evolution of EiB in the context of the Crops to End Hunger Initiative (CtEH) beyond the initial scope of providing tools, services and expert advice, and serves as a guide for Center leadership to drive changes with EiB support. In addition, EiB has taken the role of managing and disbursing funding, made available by Funders via CtEH to modernize breeding and enable CGIAR breeding programs to implement the vision provided by EiB

State of the art of existing breeding initiatives & actions planned to strengthen collaborations

State of the art of existing breeding initiatives3Introduction In order to strengthen organic breeding, it is important to know the state of the art of existing initiatives, programs and networks of organic breeding and breeding for organic, and in what crops most organic breeding is currently conducted. Although the number of organic breeding initiatives are growing, as a whole, organic breeding is still relatively marginal compared to conventional breeding. Next to more financial support, another solution to make organic breeding more effective is by improving collaborations. Collaboration can entail, among others, improved exchange of knowledge (breeding tools and approaches) or the exchange of material. In LIVESEED, several activities have been set up to improve collaboration, such as crop‐specific breeding activities, crop‐group activities and systems‐based breeding approaches. For each of these activities, timelines have been developed to strengthen collaborations. This shall improve on one side the capacity building of existing organic plant breeding programs for respective crops and help to identify breeding gaps for those crops, where no activity could be mapped so far

On internal wave breaking and tidal dissipation near the centre of a solar-type star

We study the fate of internal gravity waves, which are excited by tidal forcing by a short-period planet at the interface of convection and radiation zones, approaching the centre of a solar-type star. We study at what amplitude these wave are subject to instabilities. These instabilities lead to wave breaking whenever the amplitude exceeds a critical value. Below this value, the wave reflects perfectly from the centre of the star. Wave breaking results in spinning up the central regions of the star, and the formation of a critical layer, which acts as an absorbing barrier for ingoing waves. As these waves are absorbed, the star is spun up from the inside out. This results in an important amplitude dependence of the tidal quality factor Q'. If the tidal forcing amplitude exceeds the value required for wave breaking, efficient dissipation results over a continuous range of tidal frequencies, leading to Q' \approx 10^5 (P/1day)^(8/3), for the current Sun. This varies by less than a factor of 5 throughout the range of G and K type main sequence stars, for a given orbit. We predict fewer giant planets with orbital periods of less than about 2 days around such stars, if they cause breaking at the centre, due to the efficiency of this process. This mechanism would, however, be ineffective in stars with a convective core, such as WASP-18, WASP-12 and OGLE-TR-56, perhaps partly explaining the survival of their close planetary companions.Comment: 22 pages, 10 figures, accepted in MNRAS, abstract shortened (!

Vision of breeding for organic agriculture

This report describes the results of research into the vision of breeding systems within organic agriculture in the Netherlands. The purpose of the research was to arrive at a vision for breeding in organic agriculture by means of interviews and discussions with organic livestock farmers and social organisations. The research was prompted by the fact that, as things stand, organic livestock farmers generally have to rely on the conventional breeding supply. Neither the breeding method not the animal type produced meet the requirements of organic agriculture. Interest in breeding has increased because organic agriculture is expanding, and as yet too little attention has been paid to the development of specific organic breeding programmes and associated legislation. In recent decades conventional agriculture and breeding have tended more and more towards industrialisation and uniformity with breeding becoming a multinational concern. The breeding organisations have no incentive at present to provide special services for organic agriculture as the market is too small and the costs are too high. Taking the current breeding situation as the starting point, a number of scenarios are described for each animal sector which could gradually lead to a system of breeding which is more organic both in its aims and in the chain-based approach. The naturalness of the breeding techniques is an important factor in considering the available options. The different scenarios served as a basis for the interviews and discussions with livestock farmers and social organisations. We have established that the farmers and organisations consider it important for organic agriculture to work on developing a breeding system which follows the principles of organic agriculture. The most important reasons for this are that: (1) consumers expect all production factors in the chain to be of organic origin, (2) most livestock farmers currently use conventional breeding techniques which fall short of the organic requirements on a number of points, such as the use of artificial reproduction techniques and mono-functional breeding for production. For the development of organic breeding, livestock farmers feel that in the first instance the use of artificial reproduction techniques, including cloning and transgenic techniques, should be restricted. Next the livestock farmers and social organisations want breeding to be adapted to or based on the organic environment. There is a suspicion that owing to genotype-environment interaction (G x E) conventionally-bred animals cannot adapt well to the organic environment, and this leads to health and welfare problems. The farmers would like to see this development taking place within 5 to 10 years. It must however proceed one step at a time since the farmers cannot yet form a complete picture of the impact of all the different factors. Most of the people involved see the ideal form of breeding, with natural reproduction and regional or farm-specific selection, as a standard to be achieved in the distant future. At the moment most livestock farmers have neither the knowledge nor the socio-economic means to set up such breeding programmes. The development of breeding and the associated legislation require an international approach, for which suitable contacts must be sought in other countries. The final chapter of this report looks in more detail at the steps to be taken in each sector. Ideally developments should probably be initiated and supervised by a central body, such as an organic breeding foundation, which could be set up to govern the breeding of all farm animals

Management of broodstock and quality control of fish seed in Hungary

Common carp (Cyprinus carpio) breeding has a long tradition in Hungary. However, recent economic changes in Eastern Europe and new developments in aquaculture necessitated the need for ensuring quality of the brood stock used in hatcheries and the legal and institutional frameworks needed to implement the program. In addition to good research and development programs and gene banking, it became essential to establish an appropriate legal framework, organize, coordinate and control breeding activities, and provide financial support. It was a major breakthrough for carp breeding when C.carpio was recognized as one of the cultivated animals in the Animal Breeding Act in 1993. The Carp Breeding Section of the Hungarian Fish Producers Association plays an important role in carp breeding programs. Thirteen breeding farms of the Carp Breeding Section have 24 certified C.carpio varieties. In Hungary, about 80 % of the seed used as stocking for commercial production are from high quality certified breeders

Trade-offs between personal immunity and reproduction in the burying beetle, N. vespilloides

We know that parental investment and immune investment are costly processes, but it is unclear which trait will be prioritised when both may be required. Here we address this question using the burying beetle Nicrophorus vespilloides, carrion breeders that exhibit biparental care of young. Our results show that immunosuppression occurs during provision of parental care. We measured Phenoloxidase (PO) on Day 1-8 of the breeding bout and results show a clear decrease in PO immediately from presentation of the breeding resource onwards. Having established baseline immune investment during breeding we then manipulated immune investment at different times by applying a wounding challenge. Beetles were wounded prior to and during the parental care period and reproductive investment quantified. Different effects on reproductive output occur depending on the timing of wounding. Challenging the immune system with wounding prior to breeding does not affect reproductive output and subsequent Lifetime Reproductive Success (LRS). LRS is also unaffected by applying an immune elicitor prior to breeding, though different arms of the immune system are up/downregulated, perhaps indicating a trade-off between cellular and humoral immunity. In contrast, wounding during breeding reduces reproductive output and to the greatest extent if the challenge is applied early in the breeding bout. Despite being immunosuppressed, breeding beetles can still respond to wounding by increasing PO, albeit not to pre-breeding levels. This upregulation of PO during breeding may affect parental investment, resulting in a reduction in reproductive output. The potential role of juvenile hormone in controlling this trade-off is discussed

Molecular breeding of sugarcane using linkage disequilibrium maps and quantitative trait alleles : [Abstract W247]

Sugarcane breeding generally involves forms of recurrent selection using overlapping generations of parent genotypes, with the number of parents used in the order of 100 to 400, depending on the size of the breeding program. Genetic maps of one or a few genotypes are thus not very useful in routine breeding applications, as they provide no information on the allelic variation at important loci within the breeding population. In order to integrate mapping, marker discovery and conventional breeding we have developed methods (i) to create population-level maps of haplotypes in linkage disequilibrium within the breeding population, (ii) to identify potentially useful quantitative trait alleles (QTAs) through association analysis, and (iii) to predict to performance of progeny of bi-parental crosses from the marker (QTA) profile of the parents. The usefulness of the approach has been empirically verified in an experiment which demonstrated that the performance of progeny is better predicted by parental QTAs than by parent phenotype (h2 = 0.82, versus 0.57). By examining the population-level haplotype map, cryptic population structure caused by the complex linkage arrangements that can exist in polyploids could be detected, and accounting for this structure/linkage can further improve the effectiveness of molecular breeding. Additional uses of the map, such as identifying the ancestral origins of haplotypes, and detecting signatures of selection and recombination over several generations of breeding will be demonstrated. (Texte intégral

The effect of a strict breeding strategy on overall growth and the prevalence of inherited disorders in the double-muscled Belgian Blue beef breed

Muscular conformation is the main breeding goal in the double-muscled (I)M) Belgian Blue beef breed (BBB). In recent years the muscularity has improved enormously, though at the same time the growth rate has decreased and the prevalence of a number of inherited disorders has increased. Professionals working in the cattle breeding industry are encouraging the development of breeding strategies that will increase overall growth and decrease the amount of inherited disorders. One such breeding strategy that was tested in the field neither reduced the prevalence of inherited disorders nor improved overall growth. It can be concluded that breeding strategies should be based more on the relevant genetic values than on the phenotypic values of the parental generation