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single seed descent method

single seed descent method

GPB 232, Single seed descent method, procedure of SSD, Merits and demerits of SSD Prof. Gharge P. V. Merits and Demerits. 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. Meaning of Single Seed Descent Method: 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. This is a modified form of bulk breeding method. Single seed descent method is the modification of bulk method of breeding. Theoritically SCD method is considered more ! In this article we will discuss about:- 1. You can change your ad preferences anytime. Large number of crosses can be evaluated by this method, because less space and labour is required in each generation. Q. Higher number of transgressive lines was obtained for three traits, including plant height, days … He noted that a wheat breeding program could be divided into two stages: a) the development of pure lines from segregating populations and, b) selection among the resulting pure lines. Topic 28. soybeans, peanut, spring-sown small grains). The single seed descent (SSD) method of selection has been evaluated in safflower (Carthamus tinctoriusL.). Single seed descent (SSD) is a specialized form of inbreeding where one grows the F2 generation under a high density and restricted water and nutrient supply to provide single-stemmed plants with few grain. 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 The idea of this method was first suggested by Goulden (1941) and subsequently modified by Brim (1960). Hetrosis breeding 3. Single Seed Descent (SSD) Procedure for Single Seed Descent Method. 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. SINGLE SEED DESCENT METHOD Genetics Congress) although he did not use the term ‘Single Seed Descent’. See our Privacy Policy and User Agreement for details. Approximately 75% of the crosses made are single crosses involving only elite adapted parents. It provides a way to speed up the development of inbred lines and reduces the time, 3. Instead of bulking whole seed lot of selected plants, a single seed is selected randomly from each selected plant to make bulk. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 3. Topic 30. The idea of this method was first suggested by […] Mass, F 2-derived-family, and single-seed-descent (SSD) selection methods were compared in an interracial population (ICA Pijao × Pinto UI 114) of common bean (Phaseolus vulgaris L.). Molecular breeding 5. 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) 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. Title: Single Seed Descent 1 Single Seed Descent 2 SSD. This method is able to retain considerable variability in a breeding population. However, for soybean [Glycine max (L.) Merr. 24. RGA is a breeding approach that uses single seed descent (SSD) as the breeding method in a small screenhouse or glasshouse space. In F7 and F8, selection is practised between progeny and superior progeny are isolated based on preliminary replicated trial. 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 Higher number of transgressive lines was obtained for three traits, including plant height, days … This method is modification of bulk method. Breeders must carefully consider which method will be the most effective for their purposes. Looks like you’ve clipped this slide to already. 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 study was conducted to compare the effectiveness between the pedigree selection (PS) and single seed descent (SSD) methods in two yardlong bean crosses. Topic 18. 2. achievements of bulk method– comparison between pedigree and bulk method – single seed descent method 15. What is Single Seed Descent (SSD) Method – Definition? From each of the selected plants, F3 seeds are harvested, bulked and planted. Meaning of Single Seed Descent Method 2. The success of breeding program depends on the choice of best parents and selection method. 310. Now customize the name of a clipboard to store your clips. 4. The identity of superior F1 plants cannot be maintained in this method, their identity is lost. An accelerated-generation increase program for establishing near-homozygous lines was evaluated by both single-seed descent (SSD) and random bulk-population (BP) methods. In this method, only one seed is selected randomly from each plant in F1 and subsequent generations. 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. Individual plant selection is then conducted. The idea of this method was first suggested by Goulden (1941) and subsequently modified by Brim (1960). 2. The selected seed is bulked and is used to grow the next generation. It is a means to maintain descendants of as many F2 plants as possible, 2. The method traces to Goulden (1941, Proc 7th Int. 3 Goulden (1941) proposed a similar system (without Single Seed descent method 7. : The symbol is the notation for selfing. It provides a way to speed up the development of inbred lines and reduces the time, 3. From each of the selected plants, F3 seeds are harvested, bulked and planted. The success of breeding program depends on the choice of best parents and selection method. One seed per 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. One seed per Breeders must carefully consider which method will be the most effective for their purposes. Similarly F3, F4, F5 generation when the plants are homozygous plant progenies are advanced to next generation. Giga-fren. If you continue browsing the site, you agree to the use of cookies on this website. SAM HIGGINBOTTOM INSTITUTE OF AGRICULTURE A modification of the SSD technique (MSSD) is used in the Univ. But the modification is in such a way that it allows the equal survival of a segregates. Topic 31. *FREE* shipping on qualifying offers. 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. Single Seed Descent Method: This method was suggested by Coulden (1939) for advancing segregating generation of self-pollinated crops. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Symbols for basic crosses F: The symbol F (for filial) denotes the progeny of a cross between two parents. 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. Comparison of conventional, modified single seed descent, and doubled haploid breeding methods for maize inbred line development using GEM breeding crosses. 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. The remaining crosses involve one parent that may be considered "exotic," but possesses desirable genes.

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