If you continue browsing the site, you agree to the use of cookies on this website. The single seed descent method, proposed by Goulden (1939) and later modified by Grafius (1965), as a modification of the bulk breeding scheme, appears to have the characteristics to overcome the But the modification is in such a way that it allows the equal survival of a segregates. This method is able to retain considerable variability in a breeding population. RGA is a breeding approach that uses single seed descent (SSD) as the breeding method in a small screenhouse or glasshouse space. A breeding procedure which is used with segregating population of self pollinated species in which plants are advanced by selecting single seed per plant from F 2 generation onward is called single seed descent method. It is a means to maintain descendants of as many F2 plants as possible, 2. The modified pedigree breeding method involves the evaluation and selection of parents and hybridization to provide useful gene recombinations. This method does not provide opportunity to practise selection for superior plants till F5 generation. 1. Comparison of mass, F2-derived family, and single-seed'descent seleition methods in an interracial population of common bean Carlos A. Urrea and Shree P. Singh Centro lnternacionat de Agricultura Tropical, A.A.6713, Cati, Colombia.Received ll December 1993, accePted 14 February 1994' Urrea, C.A. Comparison of conventional, modified single seed descent, and doubled haploid breeding methods for maize inbred line development using GEM breeding crosses. Approximately 75% of the crosses made are single crosses involving only elite adapted parents. Comparative efficiency of pedigree, modified bulk and single seed descent breeding methods of selection for developing high-yielding lines in rice (Oryza sativa L.) under aerobic condition [2011] Adnan Kanbar, Katsuhiko Kondo and H.E. The superior progeny are then tested in multi-location trials and the best progeny is identified for release. Single seed descent can be used in self or cross pollinated crops. Clipping is a handy way to collect important slides you want to go back to later. This method was suggested by Goulden (1939) for advancing segregating generation of self-pollinated crops. This method is applicable to self-pollinated crops only. Single seed descent method is the modification of bulk method of breeding. The multiple seed procedure entails selecting 2–4 seeds per plant, bulking and splitting the bulk into two, one for planting the next generation, and the other half held as reserve. The identity of superior F1 plants cannot be maintained in this method, their identity is lost. This study was conducted to compare the effectiveness between the pedigree selection (PS) and single seed descent (SSD) methods in two yardlong bean crosses. Topic 19. Hetrosis breeding 3. Single seed descent method was first suggested by? Symbols for basic crosses F: The symbol F (for filial) denotes the progeny of a cross between two parents. A breeding procedure used with segregating populations of self-pollinated species in which plants are advanced by single seeds from one generation to the next is referred to as single seed descent method. Mail Id- mail2devhingra@gmail.com. Introduction There are several main breeding methods to develop new varieties for self-pollinated crops: pedigree, bulk, modi-fied bulk, single seed descent (SSD) and doubled haploid (DH) (Mackill et al., 1996; Poehlman & Sleper, 1995; Sharma, ! Topic 24. You can change your ad preferences anytime. What is Single Seed Descent (SSD) Method – Definition? Field and computer simulation studies were used to estimate breeding progress with pedigree selection, single seed descent (SSD) and combinations of early generation pedigree selection followed by SSD. The single seed descent method: When the seeds harvested from a single F4 plant is bulked to constitute an F4:5 inbred line: 1. The procedure described so far is the classic single seed descent breeding method. A different approach to reduce the number of genotypes to screen for new useful traits to use in breeding programs while maintaining a good representation of the genetic background, is the constitution of a working durum wheat collection selected by mean of a single seed descent (SSD) approach so far called SSD genotypes. It speeds up the breeding cycle, increases the number of favorable genotypes, and reduces breeding costs. Comparison of conventional, modified single seed descent, and doubled haploid breeding methods for maize inbred line development using GEM breeding crosses. The bulk method is similar to single seed descent in that selection was delayed until plants, at F5, were more or less homozygous. The F 5 lines were then produced from the seed of individual F 4 plants (single seed descent method, SSD). Rapid generation advance (RGA) with single seed descent is an effective tool for rice breeders. The idea of this method was first suggested by Goulden (1941) and subsequently modified by Brim (1960). 1. In the second procedure, the F 3 lines were yield‐tested and a pedigree method followed in the F 3 and F 4 (YT method). This method was suggested by Goulden (1939) for advancing segregating generation of self-pollinated crops. First proposed by Goulden (1939) and later modified by Brim (1966). The single seed descent (SSD) method of inbreeding minimizes the amount of genetic sampling. Topic 20. Single seed descent method can be used for quantitative traits selection because elite lines can selected, wide range of trait variation and high transgressive segregation are produced. *FREE* shipping on qualifying offers. There are many selection methods, but no method is perfect for general use with all crop plants. 3. The F 5 lines were then produced from the seed of individual F 4 plants (single seed descent method, SSD). But the modification is in such a way that it allows the equal survival of a segregates. Q. HybridisationHybridisation Inbreed with one seedInbreed with one seed from each plant in … The material can be rapidly advanced by growing the same in green house. 2. In the second procedure, the F 3 lines were yield‐tested and a pedigree method followed in the F 3 and F 4 (YT Single Seed Descent SSD Single seed descent can be used in self or cross pollinated crops. This study was conducted to compare the effectiveness between the pedigree selection (PS) and single seed descent (SSD) methods in two yardlong bean crosses. After four generations, random SSD- and BP-derived lines from two hybrid populations were evaluated in the F4, F5, and F6 generations in field experiments at two locations. The frequency of getting desirable genotypes in the advanced generation is reduced in this method. Breeders must carefully consider which method will be the most effective for their purposes. Advantages, disadvantages and applications of the bulk method are listed on the page Bulk method – advantages and applications.Know them in detail. 有性杂交后代的选择 1、系谱法(pedigree method) 2、单子传代法(single seed descent) 3、混合法(bulk-population method)。 基于8个网页-相关网页 Inbred line development will be initiated in five breeding crosses with the objective to self 500 plants and ultimately save 160 plants for advancing to S2 stage. SAM HIGGINBOTTOM INSTITUTE OF AGRICULTURE Topic 29. From each of the selected plants, F3 seeds are harvested, bulked and planted. Topic 18. Thus many superior plants may be lost. The parents used in this experiment were chosen because they are commonly used cultivars in the desert and represent the phenotypic extremes in terms of their hydrotime characteristics. Breeders must carefully consider which method will be the most effective for their purposes. Single seed descent method This method is amodification of bulk method . Genetics Congress) although he did not use the term ‘Single Seed Descent’. It is a means to maintain descendants of as many F2 plants as possible, 2. The initial population of this study was a BC2F1from … However, for soybean [Glycine max (L.) Merr. Single seed descent method: B. Diallel selective mating: C. Pedigree method: D. Bulk method: View Answer Workspace Report Discuss in Forum. However, modern breeding selection methods are mostly based on improvement of élite lines which have a narrow genetic base; this limits a lot the genetic pool which breeders can exploit for the production of new varieties ready to face the predicted climate changes or adaptation to new cultivation areas. Merits and Demerits. What is single seed descent method? We will develop F8 RILs through single seed descent by growing plants in a glasshouse. There are two main modifications of this basic procedure. Abstract Field and computer simulation studies were used to estimate breeding progress with pedigree selection, single seed descent (SSD) and combinations of early generation pedigree selection followed by SSD. This method is modification of bulk method. Description Two parental lines are crossed to generate F1 progeny which are then selfed to produce F2 plants. Four populations of linseed derived from five parents were advanced from the F2 to the F6 generation by SSD and to the F5 by pedigree selection. This method involves less record keeping ( pedigree method) and works better where the main focus is on improvement of quantitative … It is a method of inbreeding a segregating population that is quite conducive to environments that are not typical : good news for off-season nurseries! Bulk method pedigree method &line breeding, MAGIC :Multiparent advanced generation intercross and QTL discovery, Bt technology present status and future prospectus, No public clipboards found for this slide. Title: Single Seed Descent 1 Single Seed Descent 2 SSD. Rice Breeding for High Yield by Advanced Single Seed Descent Method of Selection: Malinee Janwan, Tanee Sreewongchai and Prapa Sripichitt: Abstract: Rice improvement for high yield is important to increase productivity of the crop. : The symbol is the notation for selfing. The single-seed descent (SSD) method has been successfully used in oat breeding. Back cross method 8. Pedigree selection was the most effective simulated selection method at high (75%) and moderate (50%) heritabilities. Rice Breeding for High Yield by Advanced Single Seed Descent Method of Selection: Malinee Janwan, Tanee Sreewongchai and Prapa Sripichitt: Abstract: Rice improvement for high yield is important to increase productivity of the crop. method should be implemented for routine rice breeding in order to improve breeding efficiency. The method is more useful when several generations can be grown per year. This paper reports the development of an RGA technology that integrates the germination of immature seeds with single seed descent method of breeding. ALLAHABAD-211007 There are many selection methods, but no method is perfect for general use with all crop plants. [McDonald Bright Jumbo] on Amazon.com. The selected seed is bulked and is used to grow the next generation. Topic 31. Single Seed Descent Method (Source Acquaah, 2006) Action Grow F1 plants, harvest all F2 seeds per plant Grow F2 population, harvest one seed per plant Grow F3 population, harvest one seed per plant Grow F4 population, harvest one seed per plant Space-plant to grow F5, select best single plants Grow F5-derived plant rows In the The success of breeding program depends on the choice of best parents and selection method. In SSD, a single seed from each plant is harvested in each generation and planted to produce the next generation. Visit SSD – Single Seed Descent Method. Example sentences with "single seed descent method", translation memory. Looks like you’ve clipped this slide to already. The concept was first proposed by C.H. Single Seed Descent, and Doubled Haploid Breeding Methods for Maize Inbred Line Development Using Germplasm Enhancement of Maize Breeding Crosses McDonald Jumbo, Teclemariam Weldekidan, James B. Holland, and James A. Hawk* ABSTRACT Breeding crosses from the Germplasm Enhance-ment of Maize (GEM) project between exotic The single-pod descent (SPD) and bulk methods (BM) produce redundant inbred lines that are descended from either the same F-2 or F-3 plant. The single seed descent (SSD) method of selection has been evaluated in safflower (Carthamus tinctoriusL.). add example. Topic 28. A breeding procedure used with segregating populations of self-pollinated species in which plants are advanced by single seeds from one generation to the next is referred to as single seed descent method. Large number of crosses can be evaluated by this method, because less space and labour is required in each generation. *FREE* shipping on qualifying offers. Single Seed Descent (SSD) describes a protocol utilized during the inbreeding of populations of self-and cross-pollinated species in the development of homozygous lines. Single Seed descent method 7. Single seed from each F2 plants is bulked to raise the F3 generation. Method of Plant Breeding in Self Pollinated Plants – Single Seed Descent Method Single Seed Descent Method: Single seed descent method is the modification of bulk method of breeding. 3. One seed per Single seed descent method was first suggested by? Single seed descent can be used in self or cross pollinated crops. Higher number of transgressive lines was obtained for three traits, including plant height, days … Quiz. In this article we will discuss about:- 1. 3 Goulden (1941) proposed a similar system (without The success of breeding program depends on the choice of best parents and selection method. Comparison of conventional, modified single seed descent, and doubled haploid breeding methods for maize inbred line development using GEM breeding crosses. From each of the selected plants, F3 seeds are harvested, bulked and planted. Central Superior Services (CSS) MCQs, Group E MCQs, Agriculture and Forestry MCQs, Agriculture Genetics Plant Breeding and Biotechnology MCQs, Giber (1953) , Goulden (9139) , Simmonds (1979) , Brim (1966) … If you're tired in only being able to buy a 10 pack or bulk cannabis seeds of 100, 500 or 1000, then you've come to the right seed bank. Individual plant selection is then conducted. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Botany, Plant Breeding, Procedures, Single Seed Descent Method of Plants, Terms of Service Privacy Policy Contact Us, Notes on Botany for School and College Students, Copyright infringement takedown notification policy, Copyright infringement takedown notification template, Pedigree Method of Plant Breeding | Botany, Progeny Selection: Merits and Demerits | Procedures | Plant Breeding, Rice: Distribution and Evolution | Essay | Cereal Crops | Plant Breeding. One seed per Comparison of mass, F2-derived family, and single-seed'descent seleition methods in an interracial population of common bean Carlos A. Urrea and Shree P. Singh Centro lnternacionat de Agricultura Tropical, A.A.6713, Cati, Colombia.Received ll December 1993, accePted 14 February 1994' Urrea, C.A. SINGLE SEED DESCENT METHOD overcome by adopting single seed / capsule descent method (SCD) proposed by Goulden (1939), in which single seed / capsule from every F 2 plant is composited to raise F 3 and this method of selection is continued until homozygosity is reached. Similarly F3, F4, F5 generation when the plants are homozygous plant progenies are advanced to next generation. 24. Meaning of Single Seed Descent Method 2. Individual plant selection is then conducted. Title: Single Seed Descent 1 Single Seed Descent 2 SSD. Bulk method 6. Single Seed Descent Method: Single seed descent method is the modification of bulk method of breeding. Topic 30. 3 Goulden (1941) proposed a similar system (without It provides a way to speed up the development of inbred lines and reduces the time, 3. It is commonly utilized in cultivar development of species amenable to the growth of more than one generation per year (e.g. Topic 25. These populations were used to compare the efficiency of the two methods in order to provide superior genotypes with respect to grain yield and oil content, i.e. Objective 2. Advantages and Disadvantages of SSD Method. achievements of bulk method– comparison between pedigree and bulk method – single seed descent method 15. In one procedure, a single seed was taken from each F 2 plant to produce the F 3 generation, the process was repeated for the F 4. Shashidhar; Instead of bulking whole seed lot of selected plants, a single seed is selected randomly from each selected plant to make bulk.
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