Breeding Methods For Self Pollinated Crops

Pedigree breeding is a method of genetic improvement of self-pollinated species in which superior genotypes are selected from segregating generations and proper records of the ancestry of selected plants are maintained in each generation. Self-fertilization where pollen from a plant will fertilise reproductive cells or ovules of the same plant Cross-pollination where pollen from one plant can only fertilize a different plant.

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In mass selection seeds are collected from.

Breeding methods for self pollinated crops. Breeding in self pollinated crops- pedigree breeding method Advantages of pedigree breeding Each pureline can be traced back to its ancestral F2 plant. And 4 development of hybrid varieties. 2 Rimpar Method 1867.

In other words formation of a seed by union of the male and the female gametes from the same plant also refered as autogamy. Breeding method in self pollinated crop Breeding method in cross pollinated crop Breeding Population Breeding method in self and cross pollinated crop. During this process the record of parents as well as off-springs is kept for which it is known as pedigree method.

Before we proceed into a discussion of these methods let us consider the question What is a variety. Pureline refers to the homogenous progeny of a self pollinated homozygous plant. F2 parent can be reselected to further exploit its within family variation Lots of genetic information can be gathered Selection is based on progeny tests.

Breeding Self Pollinated Crops. The deliberate mixture of isolines closely related lines or unrelated lines are referred to as multilines and the method of developing a variety from any of these mixtures is known as multiline breeding. Transfer of pollen from an anther to a stigma within the same flower or to a stigma of another flower on the same plant.

Breeding methods in self pollinated crops Various procedures like introduction selection hybridization mutations are used for genetic improvement of crop plants. Mass selection is a method of breeding in which individual plants are selected on the basis of phenotype from a mixed population their seeds are bulked and used to grow the next generation. The concept of pure line was proposed by Danish botanist Johan seen in 1903 on the basis of his studies on Princess beans Phaseolus vulgaris which is highly self pollinated species.

In this method the crop is grown under ordinary condition or unfavourable conditions with minimum water and fertilizers and the mass selection is practised. 2020-10-08 1 25 1 25. The challenge of the plant breeder is to develop better varieties.

I Pedigree Method ii Bulk Method iii Back Cross Method The objectives. Plant breeders use different methods depending on the mode of reproduction of crops which include. Cultivars Cultivar Is a group of genetically similar plants which may be identified by some means from other groups of genetically similar plants Essential Characteristics.

1 Selection of desirable plants from the segregating population in self- pollinated crops. Method of Plant Breeding in Self Pollinated Plants Pure Line Selection Johansons Pure Line Theory 1903. 3 It is also used in the selection of new superior recombinant types ie Transgressive breeding.

Method of Plant Breeding in Self Pollinated Plants Pedigree Methods Mass selection and pure line selection cannot be applied to segregating population. Breeding methods in Self Pollinated crops Breeding methods in Self Pollinated crops Deependra Dhakal Deependra Dhakal 20190415 updated. G F2 F3 etc.

Cultivar must be distinguishable from other cultivars Reproducibility. The choice of breeding method mainly depends upon four main factors. The object of hybridization is to combine desirable genes found in two or more different varieties and to produce pure-breeding progeny superior in many respects to the parental types.

The breeding method used depends on the type of cultivar to be produced. 3 hybridization with the segregating generations handled by the pedigree method the bulk method or by the backcross method. In this chapter we are concerned with the methods by which new varieties of self-pollinated crop plants originate.

The method is generally used for handling segregation generation may be grouped into three categories. For selection of a new variety from a segregating population after hybridization the methods followed in self-pollinated crop are of three types. During the 20th century planned hybridization between carefully selected parents has become dominant in the breeding of self-pollinated species.

Breeding Methods In crops Breeding Self Pollinated Crops Self-pollination. The breeding methods that have proved successful with self-pollinated species are. Individual plant progeny is selected from F 2 and subsequent generations and their progenies are tested.

In this method the crop is grown under the best environmental conditions and maximum amounts of water and fertilization to given and then mass selection practised. 2 This method is commonly used to correct some specific weaknesses of an established variety Combination breeding. There are basic types of cultivars viz inbred pure lines open-pollinated populations hybrids and clones.

The distinguishing characteristics need to be reproduced in the progeny faithfully. Application of Pedigree Method.

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