Hybrid breeding food and agriculture organization of the united. While methods for improving self pollinated species tend to focus on improving individual plants, improving cross pollinated species, on the other hand, tends to focus on improving a population of plants. Top 3 breeding methods used for crosspollinated crops. Method of plant breeding in self pollinated plants pedigree methods mass selection and pure line selection cannot be applied to segregating population. The f2 generation is sown at normal commercial planting rates in a large plot. In understanding whether a plant is true breeding homozygous or segregating heterozygous for a particular character in the assessment of the breeding value of a plant features of progeny selection. Breeding methods in cross pollinated crops slideshare. Genetic basis of selection in crosspollinated crops. Introduction populations of cross pollinated crops arc highly heterozygous as well as heterogeneous. The bulkpopulation method of breeding differs from the pedigree method primarily in the handling of generations following hybridization. The principles of population genetics are applied to effect changes in the genetic structure of a population.
Pdf on aug 6, 2015, vinay mahajan and others published genetic basis of selection in crosspollinated crops find. Sc ag seed science and technology department of genetics and plant breeding shiats allahabad up. Doctoral seminar presentation breeding methods in cross poll inated crops with major emphasis on population improvement presented by mr. Their genetic makeup is such that they show variable inbreeding depression. Quantitative genetics and breeding methods download. Method of plant breeding in self pollinated plants.
Consequently, breeding methods for cross pollinated crops aim at preventing inbreeding. Breeding methods in cross poll inated crops with major emphasis on population improvement 1. Thus methods used with crosspollinated species will differ from. Method of plant breeding in cross pollinated plants. Request pdf breeding methods in crosspollinated species plant breeding is the genetic improvement of plants and is considered to be. In this method of breeding, the best individuals with desired characters are selected on the basis of phenotypic performance in a source population. The breeding methods for crosspollinated crops are fundamentally of two types, either population improvement or production of hybrids. Method of plant breeding in cross pollinated plants selection with progeny testing. Contents introduction characters of cross pollinated crops methods of breeding in cross pollinated crops mass selection progeny selection or eartorow method modified eartorow method recurrent selection. Breeding methods in crop plants have been developed that exploit the. In this method initial plants are selected on the basis of their phenotype, but the final selection of plant based on progeny test. A population is a large group of interbreeding individuals. At maturity the crop is harvested in mass, and the seeds are used to establish the next generation in a similar plot. Mass selection, as applied to cross pollinated crops is essentially the same as that applied to self pollinated crops.
Pdf genetic basis of selection in crosspollinated crops. Breeding methods in self pollinated crops authorstream. Breeding method for cross pollinated crop authorstream. This method includes progeny selection on ear to row method and recurrent selection. Selection of superior plants is based on the genotype commonly used in cross pollinated and often cross. Consequently, seed from hybrid varieties is not used for planting stock but the farmer purchases new seed each year from seed companies.
The other method of selection for selfpollinated plants is pure line selection and for cross pollinated plants progeny selection and line breeding. Sc ag seed science and technology department of genetics and plant breeding. Mass selection mass selection is the oldest breeding scheme available for crosspollinated crops. Breeding methods in cross pollinated crops with major. Shinde assistant professor, department of agricultural botany, mpkv, rahuri. Such lines often have to be included to increase the number of parental lines making up the synthetics as lines with outstanding gca are limited in number synthetics can be produced and maintained only in cross pollinated crop species, while hybrid varieties can be produced both in self and cross pollinated crops 46.
Procedure is also called phenotypic recurrent selection. Introduction to onfarm organic plant breeding organic seed. As a consequence, a diverse set of breeding methods can be utilized for the development of various maize cultivar types for all economic conditions e. Breeding methods in crosspollinated species request pdf. This article throws light upon the top three breeding methods used for crosspollinated crops. The method is generally used for handling segregation generation may be grouped into three categories. Request pdf breeding cross pollinated crops while methods for improving self pollinated species tend to focus on improving individual plants, improving cross pollinated species, on the other. The selection cycle may be repeated one or more times to increase the frequency of favourable alleles. Breeding crosspollinated and clonally propagated crops. Breeding methods in cross poll inated crops much of the hybrid vigour exhibited by f1 hybrid varieties is lost in the next generation. Breeding methods in self pollinated crops in mass selection, seeds are collected from usually a few dozen to a few hundred desirable appearing.