Genetic Control of Root Weight, Root Volume and Root to Shoot Weight Ratio in Peas

The genetic control of root weight, root volume and root to shoot weight ratio was studied in peas (Pisum sativum L.) at flowering. The four populations used were developed from crosses between lines and cultivars differing in size of the root systems. Plants of the F1, F2 , back cross and parental generations were evaluated in pots filled with soil: sand mixture, in a completely randomized design. A generation means analysis was used to determine the inheritance of the root characteristics. Root weight and volume exhibited moderate to high broad-sense heritability (0.41 - 0.81 for root weight, and 0.44 - 0.77 for root volume). Additive and dominance effects were important in the inheritance of root weight and volume in all populations, while epistatic effects were important only in two populations. The importance of the genetic parameters in the inheritance of root to shoot weight ratio was unclear. With the presence of large additive effects and high heritability, estimates for root weight and volume, selection for superior pure lines with large root systems should be effective

Subprograma 1 Leguminosa de grano (evento 2.3.8).

152 páginas pdf.During the period October 17 December 5, 1987, I visited with researchers in the countries of Bolivia, Colombia, Ecuador, Peru and Venezuela, Appendix Item purpose of these consultations was to observe present pea (Pisum gativum L.) production and research activities and to provide recommendations for the future. I was to consider the areas of genetic improvement and agrnomic management of the crop. of genetic improvement, methodology, hybridization tech- niques, selection methods, sources of pest resistance, production systems, agronomic management, varieties, seed production and production problems.Durante el período del 17 de octubre al 5 de diciembre de 1987, visité a investigadores en los países de Bolivia, Colombia, Ecuador, Perú y Venezuela, el objeto del Apéndice del Ítem de estas consultas fue observar las actividades de producción e investigación del guisante (Pisum gativum L.) presentes y para ofrecer recomendaciones para el futuro. Debía considerar las áreas de mejoramiento genético y manejo agrícola del cultivo. de mejoramiento genético, metodología, técnicas de hibridación, métodos de selección, fuentes de resistencia a plagas, sistemas de producción, manejo agronómico, variedades, producción de semillas y problemas de producción

Report of pea (Pisum sativum L.) consultancy

Period of consultations: October 17-December 5, 1987.The purpose of these consultations was to observe present pea (Pisum sativum L.) production and research activities in Bolivia, Colombia, Ecuador, Peru and Venezuela, and to provide recommendations for the future. More specifically, areas of genetic improvement and agronomic management of the crop were considered. This included techniques of genetic improvement, methodology, hybridization techniques, selection methods, sources of pest resistance, production systems, agronomic management, varieties, seed production and production problems. The document includes observations and recommendations pertaining to each country