La Luzerne Aragon, Un Ecotypes Non Depasse En Espangne Par Les Varietes Amerliorees,
2025
Escola Superior d'Agricultura de Barcelona
La Luzerne Aragon, Un Ecotypes Non Depasse En Espangne Par Les Varietes Amerliorees, F Casanas, L Bosch, A M. Claret Verdu
IGC Proceedings (1977-2023)
ent en Espagne sont occupes par des ecotypes locaux parmi lesquels le plus important est sans doute !'Aragon. Les varietes ameliorees ne se sont done pas introduites dans le marche espagnol. Cela constitue une exception en Espagne puisque pour toutes les autres especes, les cultivars ameliores genetiquement, souvent etrangers, ont remplace presque totalement les populations naturelles. La cause de cette situation exceptionnelle pourrait etre commerciale ( essais d'inscription, campagnes publicitaires, marges beneficiaires, etc.) et/ou que la difference entre !es varietes ameliorees et les populations naturelles espagnoles n'est pas assez grande. Les resultats presentes par Hidalgo (1969) sont favorables a la …
Selection Du Ray-Grass D’Italie Pour La Tolerance Vis-A-Vis De La Rouille Couronnee,
2025
Ste RAGT
Selection Du Ray-Grass D’Italie Pour La Tolerance Vis-A-Vis De La Rouille Couronnee, J F. Chosson, Sabine Singla
IGC Proceedings (1977-2023)
En France, le Ray-Grass d'ltalie (Lolium multiflorum Lam.) (RGI) est l'espece de graminees fourrageres la plus utilisee. Pres de 1 million d'hectares sont cultives en pur ou en association avec du trefle violet. Parmi Jes principales maladies foliaires, la Rouille couronnee (Puccinia coronata Corda) (R.C.) occasionne des degiits importants sur la plupart des varietes commercialisees. Cette etude resume le travail realise par notre Societe pour ameliorer la tolerance du RGI vis-a-vis de ce parasite et montre l'interet du materiel ainsi cree pour !'adaptation a notre milieu, le rendement et la qualite du fourrage.
Influence Des Conditions Edapho-Climatiques Sur La Croissance Printaniere De Ray-Grass Anglais De Differentes Precocites, D Leconte, F Balfourier
IGC Proceedings (1977-2023)
Depuis de nombreuses annees, nous avons observe le mauvais comportement des varietes tardives implantees sur nos sols froids et humides de fond de vallee. II nous a semble interessant de preciser ces observations en liaison avec notre programme de selection du ray-grass anglais (Lolium perenne).
Breeding Guinea Grass (Panicum Maximum Jacq.) For Stall-Feeding,
2025
Punjab Agricultural University
Breeding Guinea Grass (Panicum Maximum Jacq.) For Stall-Feeding, B S. Sidhu, P D. Mehndiratta, R K. Batta
IGC Proceedings (1977-2023)
Punjab is a part oflndo-Gangetic plain with sub-tropical climate. Due to fertile alluvial soil, assured irrigation and small holdings intensive agriculture is in practice. Same plain land is suitable for forage as well as grain production, thus farmers select to grow which is profitable. Production of milk by stallfeeding of animals on multicut annual summer grasses raised under heavy nitrogen and assured irrigation is relatively economical for the farmers. Thus, a breeding programme on Guinea Grass which responds better to nitrogen than many other summer grasses, was undertaken to develop fast growing annual type which may be cultivated to produce …
Yield Trials And Protein Contents Of Five Sudangrass Cultivars In Ahvaz,
2025
Shahid Chameran University
Yield Trials And Protein Contents Of Five Sudangrass Cultivars In Ahvaz, J Bahrani
IGC Proceedings (1977-2023)
Sudangrass (Sorghum sudenense Piper Stapf) is one of the most important annual fodder crops in Kuestan plain (Southwest of Iran). The plant has been cropped in the region for more than 25 years. However, the data are scant on the yield potential and management practices of different cultivars under these hot climates where the growing season ranges from 150 to 180 days. Kaschani and Bahrani (1985) in Ahvaz, and Summer et al. (1965) in California, respectively showed 400-600 kg/ha and 178.4 kg/ha of nitrogen as split application for irrigated sudangrass. Worker (1973) found that the total dry matter production of …
Breeding For Non-Shattering Forage Vetch, Vicia Sativa L.,
2025
ICARDA
Breeding For Non-Shattering Forage Vetch, Vicia Sativa L., A.M Abd El Moneim
IGC Proceedings (1977-2023)
Because of the potential importance of common vetch, Vicia sativa L., as a forage legume to replace fallow in the cereal/fallow rotations in the Mediterranean region, it is of great importance to increase seed yield and reduce seed prices. One way of doing this is to increase the proportion of pods which do not shatter at maturity. Losses of seeds from maturing pods of forage common vetch, constitutes a serious economic problem and severely restricts the use of the species as a forage crop (Abd El Moneim, 1984). Furthermore, the harvesting of common vetch grown in fallow lands causes severe« …
Yield And Yield Components Of Some Domestic Populations And Imported Sainfoin Varieties,
2025
Sarajevo Institute of Agriculture
Yield And Yield Components Of Some Domestic Populations And Imported Sainfoin Varieties, S Alibegovic-Grbic, D Gataric
IGC Proceedings (1977-2023)
Sainfoin ( Onobrychis sativa Lam) is a fodder crop of modest requirements since it grows on eroded, shallow and dry soils, which are abundant in Yugoslavia, especially in Bosna and Herzegovina and Macedonia. However, in this country, sainfoin is not produced on large areas ; most frequently it is in the form of domestic or domesticated populations which have low yields. Although their productivity is not high, these populations are frequently characterized by a number of positive traits which can be useful in selection. The purpose of our research was the determination of selection value for some domestic populations based …
Breeding New Varieties Of Tall Fescue (Festuca Arundinacea Schreb.) Adapted To Mediterranean Environments,
2025
Sezione Operativa Periferica
Breeding New Varieties Of Tall Fescue (Festuca Arundinacea Schreb.) Adapted To Mediterranean Environments, E Piano, S Pusceddu
IGC Proceedings (1977-2023)
Tall fescue (Festuca arundinacea Schreb.) and other perennial grasses cannot be used profitably in the typical Mediterranean environments of Italy because of the inability of the existing varieties to survive the severe summer droughts. Nonetheless their utilization for pasture establishment is highly required because of their ability to extend and regularize the grazing season with respect to the currently used annual species, which concentrate most of their production in spring. A selection program aimed at developing varieties adapted to long summer Mediterranean environments from local ecotypes was activated in the late 1970's. Besides summer survival, other main objectives of …
Breeding Reliable White Clover For Low Inputs Pasture,
2025
IGAP
Breeding Reliable White Clover For Low Inputs Pasture, I Rhodes, Rosemary P. Collins, D R. Evans, Margaret J. Glendining
IGC Proceedings (1977-2023)
The need for grassland farmers to reduce financial inputs, together with a growing concern for the environment have resulted in a resurgence of interest in white clover. Many white clover varieties released during the 1960s and 1970s were bred to give high yields under the current systems of rotational grazing involving the use of inorganic N fertilizer. More recently white clover breeding objectives have been reformulated to respond to the future needs of the industry and to eliminate some of the problems still associated with the use of white clover. This paper outlines the current breeding objectives and illustrates progress …
Optimal Selection Of Components In Breeding Synthetic Populations Of Alfalfa,
2025
University of Agriculture and Forestry
Optimal Selection Of Components In Breeding Synthetic Populations Of Alfalfa, Alena Vachunova, Viasta Vagnrova, J Rod, O Mrazek, V Mika
IGC Proceedings (1977-2023)
The aim of our work from the practical point of view was to combine the experience of plant breeders in selection of material differing from the standpoint of genetic and provenance and to take advantage of material evaluation in conditions diverse in soil and climate for breeding synthetic varieties. From the theoretical point of view the choice of traits important for selection, as well as the procedures for building synthetic populations of alfalfa and the usefulness of components selection in these populations had to be verified.
Effect Of Acremonium Coenphialum On Seedling Vigor And Persistence Of Lines Of Tall Fescue Consquence On Breeding Techniques Techniques,
2025
USDA, Agricultural Research Service
Effect Of Acremonium Coenphialum On Seedling Vigor And Persistence Of Lines Of Tall Fescue Consquence On Breeding Techniques Techniques, J F. Pederson, R E. Joost
IGC Proceedings (1977-2023)
Most new forage tall fescues (Festuca arundinacea Schreb.) are being marketed as low Acremonium coenophialum MorganJones and Garns cultivars. However, the breeding techniques and objectives used in the development of these new cultivars were similar to those used prior to the discovery of A. coenophialum in tall fescue (Pedersen and Sleper, 1988). The low A. coenophialum status of many new cultivars was produced accidentally, or by seed treatment after breeding work was completed. There is little evidence that A. coenophialum impacts the agronomic fitness of tall fescue in the field. A lack of stand persistence in low A. coenophialum tall …
The Role Of Selfing In The Breeding Of Lolium Italicum,
2025
Instituto Sperimentale per la Colture Foraggere
The Role Of Selfing In The Breeding Of Lolium Italicum, P Rotili, C Scotti, M Romani
IGC Proceedings (1977-2023)
In the irrigated plains of Lombardy (Italy) permanent meadows are continuously eliminated and replaced with maize. This imposes the collection and conservation of Lolium italicum and other species typical of these meadows (dactylis, bromus spp. etc.). Many expeditions were made by the Forage Crops Institute of Lodi, together with English colleagues as well as colleagues from Belgium, Holland, Japan and France. At present, Lolium italicum is extensively used as catch crop, sown in autumn and harvested in spring, before sowing maize. But we consider this plant useful for artificial meadows, able to give a full production for two years …
The Effect Of Selfing On Trifolium Alexandrinum Measured In Conditions Of Interference Among The Plants,
2025
Instituto Sperimentale per le Colture Foraggere
The Effect Of Selfing On Trifolium Alexandrinum Measured In Conditions Of Interference Among The Plants, P Rotili, G Gnocchi
IGC Proceedings (1977-2023)
After the constitution of the cv Sacromonte the breeding work on berseem (Trifolium alexandrinum) at the Forage Crop Institute of Lodi was slowed. A renewed interest in nitrogen fixing legumes in recent years has led to a program aimed at reevaluating the berseem clover. Today this crop is utilized not only in South Italy (autumn sowing) but in North Italy as well and in some Central European countries (spring sowing). The greatest utilization is in Egypt where berseem is grown either for forage crop or for green manure crop, usually preceding cotton or summer vegetables.
Analysis Of Variation In Sainfoin (Onobrychis Viciifolia) By Clustering,
2025
University of Western Australia
Analysis Of Variation In Sainfoin (Onobrychis Viciifolia) By Clustering, J A. Fortune
IGC Proceedings (1977-2023)
Sainfoin (Onobrychis viciifolia) is a forage legume that attracts interest due to its feeding value to ruminants. This is based on factors such as hight voluntary intake, non-bloating and protein protection, all of which appear related to the concentration of condensed tannins in the plant tissue (Ulyatt et al., 1977). Agronomic difficulties with sainfoin such as low yield and poor persitence show a lack of consistency between experiments which seem to be due, in part, to the level of heterogeneity displayed by the available sainfoin cultivars and germplasm (Fortune and Withers, 1980; Rumball, 1982). By permitting examination of the …
Recurrent Selection And Hydroponic Cultures For Improving The Efficiency Of Forage Grass Breeding,
2025
SVP
Recurrent Selection And Hydroponic Cultures For Improving The Efficiency Of Forage Grass Breeding, A.P M. Den Nijs, A.H C.M Schapendonk
IGC Proceedings (1977-2023)
The largest constraint in breeding temperate grasses is the efficiency of selection. This is related to the complex combination of desired characters which ensures persisting productivity. Selection usually starts with spaced plants, later followed by progeny tests in sown swards. The applicability of selection among spaced plants for characters to be expressed under heavy competition in the grass sward has often been debated. A solution to this problem is growing spaced plants under competitive conditions provided by a sward of a distinguishable grass species (Van Dijk and Winkelhorst, 1978). Recurrent selection of slightly inbred populations of perennial ryegrass via this …
Great Diversity For Increased Yield Within Narrow Grass Population,
2025
USDA, Agricultural Research Service
Great Diversity For Increased Yield Within Narrow Grass Population, Glenn W. Burton
IGC Proceedings (1977-2023)
Increasing yield of animal product per unit of input is the ultimate objective of any forage breeding project. It increases the efficiency of production and the profit of the producer. It may be achieved by screening and utilizing the world diversity of a species as has been demonstrated in Cynodon spp. (Burton, 1947, 1988). It can also be realized by recurrent restricted phenotypic selection (RRPS) within a narrow-based grass population. Pensacola bahiagrass, Paspalum notatum var. saure Parodi, a sexual diploid (2n = 20) that occupies several million hectares in the southern USA is such a grass. It originated as a …
Recurrent Selection Of White Clover (Trifolium Repens L.) Using Self-Compatibility Factor,
2025
Tohoku National Agricultural Experiment Station
Recurrent Selection Of White Clover (Trifolium Repens L.) Using Self-Compatibility Factor, T Yamada, S Higuchi, H Fukuoka
IGC Proceedings (1977-2023)
White clover (Trifolium repens L.) is a very important forage legume in temperate grasslands. Mass selection, maternal line selection and synthetics are used in most cases of white clover breeding. Usually these breeding methods are cyclical schemes of selection by which frequencies of favorable genes are increased in the population, and such selections represent recurrent selection in its broadest sense (Hallauer, 1981). However, in a narrow sense it seems that a recurrent selection procedure, by which parents of superior families or strains are maintained by means of lines, is more promising for the improvement of outcrossing species. The greatest …
Mise Au Point De Techniques D’Electrophorese D’Enzymes Et De Proteines Pur L’Etude Du Polymorphisme D’Especes Spontanees Annuelles De Medicago,
2025
Universite d'Oran
Mise Au Point De Techniques D’Electrophorese D’Enzymes Et De Proteines Pur L’Etude Du Polymorphisme D’Especes Spontanees Annuelles De Medicago, F Zhora Fyad-Lameche
IGC Proceedings (1977-2023)
Ce-travail s'inscrit dans le cadre d'une etude plus vaste, qui a pour but !'exploitation des Medicago annuels, menee par l'I.D.G.C. qui organise a cet effet depuis plusieurs annees, un programme de prospection et de collection de ces especes. Ce materiel, destine a une utilisation accrue en agronomie, necessite une etude genetique. Dans cette perspective, ii fut decide d'utiliser le polymorphisme enzymatique et proteique pour l'etude du systeme de reproduction, !'evaluation de la variabilite et l'identificatiQn de differents ecotypes. Dans cette note sont decrites !es conditions techniques optimales pour !'analyse par electrophorese de differents systemes enzymatiques et des proteines totales et …
Selection Of Paspalum Spp. Adapted To Seasonally Flooded Varzea Lands In Central Brazil,
2025
CIAT/EMBRAPA/IICA
Selection Of Paspalum Spp. Adapted To Seasonally Flooded Varzea Lands In Central Brazil, B Grof, R P. De Andrade, M A. De Souza, J.M F. Valls
IGC Proceedings (1977-2023)
Seasonally flooded lands with a high water table (varzea) constitute a significant portion of the Cerrados. It is estimated that there are 30 x 106 ha of hydromorphic soils in Brazil and 12 x 106 ha of these varzea lands are situated in the Cerrados (Goedert, 1986). Paspalum is a predominantly American genus, it contains c. 250 species, most of which are good grazing grasses and several of which are adapted to wet situations. According to Chase (1944), the majority of the c. 160 species of this genus occurring in Brazil are well-accepted by cattle. A major limitation to the …
Forage Germplasm Resources For The Mediterranean And Adjacent Arid/Semi-Arid Areas,
2025
IBPGR
Forage Germplasm Resources For The Mediterranean And Adjacent Arid/Semi-Arid Areas, R Reid, J Konopka, P M. Perret, L Guarino
IGC Proceedings (1977-2023)
The mandate of IBPGR is to further the study, collection, documentation, evaluation and utilization of the genetic diversity of useful plants for the benefit of people throughout the world. Between 1974, when IBPGR was established as an autonomous centre in the CGIAR system, and 1988, IBPGR has been responsible for ensuring the collection and conservation of significant genetic resources to the world's germplasm collections.
