实验一 园艺作物育种目标的制定（Experiment 1. Formulation of horticultural crop breeding objectives）.doc

实验一 园艺作物育种目标的制定（Experiment 1. Formulation of horticultural crop breeding objectives） Make a experiment of horticultural crops breeding objectives An experimental objective and requirements Master the breeding objectives of horticultural plant characteristics, target traits, breeding the main principles, understand the requirements of modern agriculture, horticultural varieties, breeding goal setting process. The main target of two, horticultural breeding The breeding goal is the basis and guide the breeding work, formulate breeding objectives is the first step of the breeding work, is the key to the success of breeding. The main breeding objectives of horticultural crops 1, high yield, good quality, 2, 3, 4, strong adaptability, disease and insect resistance and herbicide, and 5 different mature period, Three, the main target characters 1, yield High yield is a basic requirement for breeding of horticultural crops, varieties with high yield potential is the material foundation for high yield. The yield can be divided into biological yield and economic yield. The former refers to a certain period of time, the total amount of all units within the area of photosynthetic products, the latter refers to the use of goods as part of the harvest, the ratio between the two is called economic coefficient (coefficient of economics). The economic coefficient (coefficient of Economics) = economic yield / biomass yield For garden decoration ornamental plants, the whole plant and the community for the use of objects, the economic coefficient is up to 100%, and in the production of fruits, vegetables, flowers, horticultural crops and economic coefficient is low, and the varietal variation. Yield and yield component factors. Such as the grape yield components including plant (or unit area) total branch number, branch, branch% average ear number, average weight of single ear. According to the times than directly according to the plant yield of choice can reflect the yield potential of