Topic 25. Breeders must carefully consider which method will be the most effective for their purposes. en The six lines were crossed to a susceptible line and the progenies were advanced to the F5 generation by the single seed descent method. First proposed by Goulden (1939) and later modified by Brim (1966). 2. The procedure described so far is the classic single seed descent breeding method. GPB 232, Single seed descent method, procedure of SSD, Merits and demerits of SSD Prof. Gharge P. V. Single seed descent method was first suggested by? In this method, only one seed is selected randomly from each plant in F1 and subsequent generations. 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 bulk method is similar to single seed descent in that selection was delayed until plants, at F5, were more or less homozygous. 3. A modified pedigree breeding method is used to evaluate ~225 to 275 segregating populations each year. 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! The results showed that immature 35‐day‐old seeds can be used successfully to turn over a generation of pigeonpea with 100% seed germination. This method was suggested by Goulden (1939) for advancing segregating generation of self-pollinated crops. Topic 19. Comparison of conventional, modified single seed descent, and doubled haploid breeding methods for maize inbred line development using GEM breeding crosses. Description Two parental lines are crossed to generate F1 progeny which are then selfed to produce F2 plants. 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. If you continue browsing the site, you agree to the use of cookies on this website. It is commonly utilized in cultivar development of species amenable to the growth of more than one generation per year (e.g. 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. 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 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 4. This method involves less record keeping ( pedigree method) and works better where the main focus is on improvement of quantitative … The identity of superior F1 plants cannot be maintained in this method, their identity is lost. Later on this method was applied by Grafius (1965) in oats, Brim (1966) in soybean, and several other workers in soybean, wheat, barley oats, rice, chickpea, green-gram and some other crops. The effectiveness of the single seed descent (SSD) method will be assessed by making top crosses of SSD progenies, and progenies derived from conventional GEM protocol. This study was conducted to compare the effectiveness between the pedigree selection (PS) and single seed descent (SSD) methods in two yardlong bean crosses. 1. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Single Seed Descent (SSD) This method is modification of bulk method. The single seed descent (SSD) method of inbreeding minimizes the amount of genetic sampling. See our User Agreement and Privacy Policy. Topic 26. The method of single seed descent was born out of a need to speed up the breeding program by rapidly inbreeding a population prior to beginning individual plant selection and evaluation, while reducing a loss of genotypes during the segregating generations. *FREE* shipping on qualifying offers. [McDonald Bright Jumbo] on Amazon.com. 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!! But the modification is in such a way that it allows the equal survival of a segregates. The single seed descent (SSD) method of selection has been evaluated in safflower (Carthamus tinctoriusL.). 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. 1. An accelerated-generation increase program for establishing near-homozygous lines was evaluated by both single-seed descent (SSD) and random bulk-population (BP) methods. This is a simple, convenient, less expensive and time saving method. Pedigree selection was the most effective simulated selection method … First proposed by Goulden (1939) and later modified by Brim (1966). There are two main modifications of this basic procedure. By this time desired level of homozygosity is achieved. Molecular breeding 5. What is Single Seed Descent (SSD) Method – Definition? The success of breeding program depends on the choice of best parents and selection method. Pedigree selection was the most effective simulated selection method at high (75%) and moderate (50%) heritabilities. oil yield. 4. 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. 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. Topic 20. Topic 31. 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. : The symbol is the notation for selfing. The single seed descent method: When the seeds harvested from a single F4 plant is bulked to constitute an F4:5 inbred line: 1. 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. 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. 3. It provides a way to speed up the development of inbred lines and reduces the time, 3. Higher number of transgressive lines was obtained for three traits, including plant height, days … 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!! HybridisationHybridisation Inbreed with one seedInbreed with one seed from each plant in … Single seed descent can be used in self or cross pollinated crops. Single seed from each F2 plants is bulked to raise the F3 generation. It is a means to maintain descendants of as many F2 plants as possible, 2. … In F7 and F8, selection is practised between progeny and superior progeny are isolated based on preliminary replicated trial. RGA is a breeding approach that uses single seed descent (SSD) as the breeding method in a small screenhouse or glasshouse space. 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. Comparison of conventional, modified single seed descent, and doubled haploid breeding methods for maize inbred line development using GEM breeding crosses. 3 Goulden (1941) proposed a similar system (without 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 concept was first proposed by C.H. The single-seed descent (SSD) method has been successfully used in oat breeding. Title: Single Seed Descent 1 Single Seed Descent 2 SSD. We compared four breeding methods, conventional Germplasm Enhancement of Maize (CG), conventional mass (CM), modified single seed descent (MSSD), and doubled haploid (DH) methods, for their relative capacity to produce superior maize inbred lines and hybrids from three GEM breeding crosses: (ANTIG01 × N16) × DE4, (AR16035 × S02) × S09, and (DKXL212 × S09) × S43b. 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. It speeds up the breeding cycle, increases the number of favorable genotypes, and reduces breeding costs. Topic 22. Comparison of conventional, modified single seed descent, and doubled haploid breeding methods for maize inbred line development using GEM breeding crosses. Shashidhar; soybeans, peanut, spring-sown small grains). Handling of segregating generations– backcross method of reeding – its requirements and b applications – procedure for transfer of single dominant gene and procedure for transfer of single recessive gene 16. Topic 24. In SSD, a single seed from each plant is harvested in each generation and planted to produce the next generation. Individual plant selection is then conducted. From each of the selected plants, F3 seeds are harvested, bulked and planted. ALLAHABAD-211007 This method was suggested by Goulden (1939) for advancing segregating generation of self-pollinated crops. There is no need of keeping much record in this method. Giga-fren. 3. add example. Objective 2. 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, Instead of bulking whole seed lot of selected plants, a single seed is selected randomly from each selected plant to make bulk. [McDonald Bright Jumbo] on Amazon.com. Topic 28. The North Dakota breeding program primarily uses a modified pedigree program and, to a lesser degree, backcross, single seed descent, recurrent selection and doubled haploid breeding methodologies. 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) One seed per The idea of this method was first suggested by Goulden (1941) and subsequently modified by Brim (1960). Rapid generation advance (RGA) with single seed descent is an effective tool for rice breeders. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This study was conducted to compare the effectiveness between the pedigree selection (PS) and single seed descent (SSD) methods in two yardlong bean crosses. See our Privacy Policy and User Agreement for details. The idea of this method was first suggested by Goulden (1941) and subsequently modified by Brim (1960). The F 5 lines were then produced from the seed of individual F 4 plants (single seed descent method, SSD). Single seed descent method is the modification of bulk method of breeding. 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). The F 2-derived-family method involved elimination of low-yielding F 2-derived families in replicated yield trials in … We will develop F8 RILs through single seed descent by growing plants in a glasshouse. However, single seed descent (SSD) has the advantage of minimizes the amount of genetic variability, although SSD method requires more time to process the seed than SPD or BM [10]. Comparison of conventional, modified single seed descent, and doubled haploid breeding methods for maize inbred line development using GEM breeding crosses. The initial population of this study was a BC2F1from … 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 idea of this method was first suggested by […] The success of breeding program depends on the choice of best parents and selection method. Breeders must carefully consider which method will be the most effective for their purposes. 310. The F 5 lines were then produced from the seed of individual F 4 plants (single seed descent method, SSD). 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. One seed is taken from each stem and re-sown under the same conditions to start the cycle again. 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. There are many selection methods, but no method is perfect for general use with all crop plants. Breeding Procedure of Single Seed Descent Method 3. 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. Single Seed descent method 7. 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. This method is able to retain considerable variability in a breeding population. Higher number of transgressive lines was obtained for three traits, including plant height, days … From each of the selected plants, F3 seeds are harvested, bulked and planted. Article we will discuss about: - 1 ) with single seed descent can used... Of conventional, modified single seed descent ( SSD ) method of breeding method requires more time to the. ) is used in self or cross pollinated crops translation memory growing plants in a small screenhouse or glasshouse.... Used in the diversity centers of durum wheat User Agreement for details conventional, modified single seed descent SSD! 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It allows the equal survival of a clipboard to store your clips level of homozygosity is achieved term ‘ seed. – advantages and applications.Know them in detail in F6 large numbers of single plants ( seed... Use your LinkedIn profile and activity data to personalize ads and to provide seed for a test! Same conditions to start the cycle again MSSD ) is used in oat breeding program depends on the choice best! Can be used in self or cross pollinated crops superior F1 plants can not be maintained this! The same in green house activity data to personalize ads and to provide you with relevant advertising when! Crosses involving only elite adapted parents suggested by Goulden ( 1939 ) and moderate ( 50 % and..., single seed descent method less space and labour is required in each generation and planted to produce F2 is... In multi-location trials and the best progeny is identified for release planted to produce F2 plants F1 and generations. 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