ii. Improved clones of asexually propagating plants are selected and allowed to grow under conditions, which favour flowering and seed setting. Plant Introduction consists of taking a genotype or a group of genotype of plants into a new area or region where they were not being grown before. It has been observed that pollen grains of rice are killed by immersing the inflorescence for 5 to 10 minutes in the hot water maintained at 40-44°C in a thermos flask. 2. It is the only method used for the interspecific transfer of characters, transfer of qualitative characters, quantitative characters, transfer of cytoplasm, particularly for male sterility and for the production of isogenics lines. This method was suggested by Coulden (1939) for advancing segregating generation of self-pollinated crops. In this method individual plants are selected till the progenies become homozygous. It requires lot of time and money. It is actually a website that is visioned to become a mentor of plant science students. Improvement in crop variety is done to get better varieties of crops with the desired qualities.One method to improve crop variety is hybridisation.Hybridisation is the crossing of two plants genetically dissimilar.It can be done between two species (interspecific) ,between two plants of same genera (intergeneric) and between different varieties (intervarietal). Hybridization is used to de velop new genotypes, … This species is composed of several varieties and morphotypes are usually referred to as coles. Nilsson-Eule of Sweden was first to use the bulk method and it is in use ever since. Either the inbred or the variety may be used as female parent, but to use variety as female is preferable. Example: Hibiscus syriacus (Melwhite) x Hibiscus sinosyriacus (Lilac queen). The production of a hybrid by crossing two individuals of unlike genetical constitutions and the individuals may be within same variety/ species/ genus or between different varieties/species/genera is known as hybridization. It is used not only for the developing hybrid but to test the combining ability of the inbreeds. Initial challenge to improve crop yields is to find a crop variety that increase crop yield. (ii) Selfing of parents or artificial self-pollination. In alfa-alfa, a treatment of even 10 seconds with 57 % alcohol is sufficient to kill the pollen grains. Introduction. Found reciprocal crossing produced identical results. Selected material becomes so large that handling of the same becomes very difficult. CROP IMPROVEMENT DARE/ICAR ANNUAL REPORT 2013–14 38 Oilseed varieties/hybrids released Crop/ Variety/Hybrid Recommended state/region Salient features Indian Mustard RGN 229 Delhi, Haryana, Punjab, Tolerant to high temperature and salinity during Jammu and parts of Rajasthan seedling stage; seed yield (2,162-2,568 kg/ha) These include rice, wheat, maize, barley, etc. Further breeding in these hybrids is carried out according to either pedigree or bulk method. Better quality: There are different reasons for improving the quality of different crops, such as improvement of the baking quality in cereals like wheat. To improve and increase food production through the available technological advancements. A 35 cm long rubber tube or belt is stretched over the side of the container, and when in use this tube is tied around the peduncle of the head. In the field water is carried in a thermos jug (Fig. (With Methods)| Industrial Microbiology, How is Cheese Made Step by Step: Principles, Production and Process, Enzyme Production and Purification: Extraction & Separation Methods | Industrial Microbiology, Fermentation of Olives: Process, Control, Problems, Abnormalities and Developments. Crop Improvement 27 CROP IMPROVEMENT the All India Coordinated Rice Improvement Programme, 33 cultures were identified as most promising for various ecosystems. Discuss the role of hybridisation on crop improvement 2 See answers Answers reemabiswas982750 Helping Hand; any singal variety of plant species may not possess all the useful characters. Definition: The production of plants in F2 generation that are superior to both the parents for one or more characters is known as transgressive breeding. Inheritance of characters can not be obtained as hybrid species of the following steps. 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