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Guidelines for Identification, Delineation and Description of Neem Seed Sources

Year of publication 2014

Place of publication Rome, Italy ;

Product type Meeting

Edition 1

Synopsis (short abstract) Exploration, identification and description/documentation of neem seed sources in its natural distribution and among land races are the first activities to be undertaken in any neem selection and improvement programme. Several schools of thought exist regarding the definition of the term "provenance". Further, the term "origin" is used by the OECD to refer to natural populations only. To avoid confusion the term "seed source" is used in this document initially to mean the exact location where se eds have been collected, with no genetical implication. When trials are established, the term "provenance" will have to be used to refer to the plants in the nurseries and trials. The present guidelines, based on a proposal by the DANIDA Forest Seed Centre, Denmark, were discussed and approved for implementation by the International Neem Network in the Second Consultation on Neem Improvement, Jodhpur, India, 28 February - 4 March 1994. The objective of these guidelines is to provide a common pro cedure for seed source exploration, identification and description. A common procedure is necessary to compare the characteristics of the seed sources and to select the seed sources which should be proposed for inclusion in the international trials to represent the different ecoclimatic conditions, and to establish a data base on seed sources identified for the species. These guidelines should be implemented by all the Network collaborators. They may also be useful to any other neem selection and improvement programme.

Language English

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  • No Thumbnail Available
    Meeting
    Directives pour l'identification, la délimitation et la description des sources de semences de neem 1994
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    Tout programme de sélection et d’amélioration du neem devra commencer par des activités de prospection, d’identification et de description/documentation des sources de semences de neem dans l’aire de répartition naturelle de l’espèce et parmi les races locales. Il existe plusieurs définitions du terme « provenance ». L’OCDE utilise le terme « origine » pour désigner les populations naturelles uniquement. Pour éviter toute confusion, on utilise l’expression « source de semence » dans ce document au départ pour indiquer l’emplacement exact où les semences ont été récoltées, sans conséquence sur le plan génétique. Une fois les essais mis en place, on utilisera le terme « provenance » pour indiquer les plants présents dans les pépinières et les essais. Les présentes directives, fondées sur une proposition du Centre DANIDA de semences forestières (Danemark), ont été examinées et approuvées par le Réseau international sur le neem au cours de la deuxième Consultation sur l’amélioration du nee m, tenue à Jodhpur (Inde) du 28 février au 4 mars 1994. L’objectif de ces directives est de fournir une procédure commune pour la prospection, l’identification et la description des sources de semences. Une procédure commune est nécessaire pour: Comparer les caractéristiques des sources de semences et sélectionner les sources de semences qui devraient être proposées pour inclusion dans les essais internationaux afin de représenter les différentes conditions écoclimatiques, et Etablir une base de données sur les sources de semences identifiées pour l’espèce. Ces directives devraient être appliquées par tous les collaborateurs du Réseau. Elles pourraient aussi être utiles à tout programme de sélection et d’amélioration du neem.
  • No Thumbnail Available
    Meeting
    Report of the Workshop of the International Neem Network - Yangon, Myanmar - 28 July - 1 August 1997 1997
    Also available in:
    No results found.
    National institutions of 23 countries, in Asia, Africa, Latin America and Europe, are participating in the Network which is coordinated by FAO. During 1993 and 1994, seed-sources were surveyed and documented throughout the natural range of the species and in areas of introduction. Pilot seed collection and exchange were undertaken to improve the procedures used in these very difficult operations, Neem seed having a recalcitrant or intermediate behaviour. A training workshop was organised in July 1994, in Coimbatore (India), to familiarise network collaborators with the improved procedures for seed collection and exchange. Twenty five seed-sources, representing the eco-geographical variation in the range of distribution of the species, were selected for seed collection and exchange among network collaborators in 1995, for establishment of international provenance trials. Results of seed exchange and nursery production were discussed at a workshop of the International Neem Network in Ban gkok in March 1996. At this meeting guidelines for trial design of international provenance trials were discussed and adopted. Following the Bangkok workshop, approx. 30 international provenance trials were established by network collaborators in some 15 countries, sampling the full range of ecological conditions within the distribution area of Neem. The main objectives of the workshop were to (i) report and discuss the 1996 activities of the network, especially the results of the trial establis hment; (ii) discuss and adopt guidelines for assessment of provenance trials; (iii) discuss the future activities of the Network; and (iv) visit Neem research activities in the field in Myanmar.
  • No Thumbnail Available
    Meeting
    Report of the Workshop of the International Neem Network - Bangkok, Thailand, 14-15 March 1996 1996
    Also available in:
    Following the recommendations and agreements of the First and Second International Consultations on Neem Improvement, Bangkok (Thailand) January 1993, and Jodhpur (India) March 1994, the International Neem Network was established with the long term objective to improve the genetic quality and adaptability of neem and to improve its utilization, throughout the world, as a contribution to development in the countries concerned, in particular in concern of meeting the needs of rural people. In the initial stage, the main component of the activities of the Network is: Provenance exploration, collection and exchange for establishment of internationally coordinated trials. The Network also decided to undertake research activities in Phenology, Seed Physiology and Tehnology, Genetic diversity and Reproductive biology, and Variation in chemical compounds. National institutions of 23 countries, in Asia, Africa, Latin America and Europe, are participating in the Network which is coordinated by F AO. The main objectives of the workshop were to (i) report and discuss the 1995 activities of the network; (ii) discuss and adopt the guidelines for design and establishment of provenance trials; and (iii) to discuss the future activities of the Network. This report describes and summarizes the discussions and recommendations of the meeting.
  • No Thumbnail Available
    Meeting
    Directives pour l'identification, la délimitation et la description des sources de semences de neem 1994
    Also available in:
    Tout programme de sélection et d’amélioration du neem devra commencer par des activités de prospection, d’identification et de description/documentation des sources de semences de neem dans l’aire de répartition naturelle de l’espèce et parmi les races locales. Il existe plusieurs définitions du terme « provenance ». L’OCDE utilise le terme « origine » pour désigner les populations naturelles uniquement. Pour éviter toute confusion, on utilise l’expression « source de semence » dans ce document au départ pour indiquer l’emplacement exact où les semences ont été récoltées, sans conséquence sur le plan génétique. Une fois les essais mis en place, on utilisera le terme « provenance » pour indiquer les plants présents dans les pépinières et les essais. Les présentes directives, fondées sur une proposition du Centre DANIDA de semences forestières (Danemark), ont été examinées et approuvées par le Réseau international sur le neem au cours de la deuxième Consultation sur l’amélioration du nee m, tenue à Jodhpur (Inde) du 28 février au 4 mars 1994. L’objectif de ces directives est de fournir une procédure commune pour la prospection, l’identification et la description des sources de semences. Une procédure commune est nécessaire pour: Comparer les caractéristiques des sources de semences et sélectionner les sources de semences qui devraient être proposées pour inclusion dans les essais internationaux afin de représenter les différentes conditions écoclimatiques, et Etablir une base de données sur les sources de semences identifiées pour l’espèce. Ces directives devraient être appliquées par tous les collaborateurs du Réseau. Elles pourraient aussi être utiles à tout programme de sélection et d’amélioration du neem.
  • No Thumbnail Available
    Meeting
    Report of the Workshop of the International Neem Network - Yangon, Myanmar - 28 July - 1 August 1997 1997
    Also available in:
    No results found.
    National institutions of 23 countries, in Asia, Africa, Latin America and Europe, are participating in the Network which is coordinated by FAO. During 1993 and 1994, seed-sources were surveyed and documented throughout the natural range of the species and in areas of introduction. Pilot seed collection and exchange were undertaken to improve the procedures used in these very difficult operations, Neem seed having a recalcitrant or intermediate behaviour. A training workshop was organised in July 1994, in Coimbatore (India), to familiarise network collaborators with the improved procedures for seed collection and exchange. Twenty five seed-sources, representing the eco-geographical variation in the range of distribution of the species, were selected for seed collection and exchange among network collaborators in 1995, for establishment of international provenance trials. Results of seed exchange and nursery production were discussed at a workshop of the International Neem Network in Ban gkok in March 1996. At this meeting guidelines for trial design of international provenance trials were discussed and adopted. Following the Bangkok workshop, approx. 30 international provenance trials were established by network collaborators in some 15 countries, sampling the full range of ecological conditions within the distribution area of Neem. The main objectives of the workshop were to (i) report and discuss the 1996 activities of the network, especially the results of the trial establis hment; (ii) discuss and adopt guidelines for assessment of provenance trials; (iii) discuss the future activities of the Network; and (iv) visit Neem research activities in the field in Myanmar.
  • No Thumbnail Available
    Meeting
    Report of the Workshop of the International Neem Network - Bangkok, Thailand, 14-15 March 1996 1996
    Also available in:
    Following the recommendations and agreements of the First and Second International Consultations on Neem Improvement, Bangkok (Thailand) January 1993, and Jodhpur (India) March 1994, the International Neem Network was established with the long term objective to improve the genetic quality and adaptability of neem and to improve its utilization, throughout the world, as a contribution to development in the countries concerned, in particular in concern of meeting the needs of rural people. In the initial stage, the main component of the activities of the Network is: Provenance exploration, collection and exchange for establishment of internationally coordinated trials. The Network also decided to undertake research activities in Phenology, Seed Physiology and Tehnology, Genetic diversity and Reproductive biology, and Variation in chemical compounds. National institutions of 23 countries, in Asia, Africa, Latin America and Europe, are participating in the Network which is coordinated by F AO. The main objectives of the workshop were to (i) report and discuss the 1995 activities of the network; (ii) discuss and adopt the guidelines for design and establishment of provenance trials; and (iii) to discuss the future activities of the Network. This report describes and summarizes the discussions and recommendations of the meeting.
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