1. RGA is a breeding approach that uses single seed descent (SSD) as the breeding method in a small screenhouse or glasshouse space. It speeds up the breeding cycle, increases the number of favorable genotypes, and reduces breeding costs. The idea of this method was first suggested by Goulden (1941) and subsequently modified by Brim (1960). In F6 large numbers of single plants (400-500) are selected and their progeny are grown separately. Meaning of Single Seed Descent Method 2. Single Seed Descent Method: Single seed descent method is the modification of bulk method of breeding. 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. 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. achievements of bulk method– comparison between pedigree and bulk method – single seed descent method 15. 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). Comparison of conventional, modified single seed descent, and doubled haploid breeding methods for maize inbred line development using GEM breeding crosses. Single Seed Descent (SSD) Procedure for Single Seed Descent Method. This method is able to retain considerable variability in a breeding population. 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. Molecular breeding 5. By this time desired level of homozygosity is achieved. 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. Pedigree selection was the most effective simulated selection method … From each of the selected plants, F3 seeds are harvested, bulked and planted. One seed per Buy Single Seeds 1 Cannabis Seed Per Pack Single Seeds is proud to offer you premium cannabis seed connections. Objective 2. SAM HIGGINBOTTOM INSTITUTE OF AGRICULTURE Large number of crosses can be evaluated by this method, because less space and labour is required in each generation. A modification of the SSD technique (MSSD) is used in the Univ. Single seed descent method: B. Diallel selective mating: C. Pedigree method: D. Bulk method: View Answer Workspace Report Discuss in Forum. 1. Topic 24. add example. Topic 23. Similarly F3, F4, F5 generation when the plants are homozygous plant progenies are advanced to next generation. Higher number of transgressive lines was obtained for three traits, including plant height, days … ALLAHABAD-211007 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. 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 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. The procedure described so far is the classic single seed descent breeding method. Single Seed descent method 7. 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 (SSD) method of selection has been evaluated in safflower (Carthamus tinctoriusL.). 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. One seed per The single seed descent method: When the seeds harvested from a single F4 plant is bulked to constitute an F4:5 inbred line: 1. Now customize the name of a clipboard to store your clips. In this case, three-way crosses are used where the … Several breeding methods are available to plant breeders for germplasm improvement, such as the pedigree method, bulk method, single seed descent, backcross method, and recurrent selection. 310. Breeding Procedure of Single Seed Descent Method 3. ], the SSD method requires more time to process the seed than the SPD or BM. Comparison of conventional, modified single seed descent, and doubled haploid breeding methods for maize inbred line development using GEM breeding crosses. Topic 30. GPB 232, Single seed descent method, procedure of SSD, Merits and demerits of SSD Prof. Gharge P. V. It is a means to maintain descendants of as many F2 plants as possible, 2. The initial population of this study was a BC2F1from … If you continue browsing the site, you agree to the use of cookies on this website. The selected seed is bulked and is used to grow the next generation. This method is modification of bulk method. 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 4. 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. This process is generally continued upto F5 generation. Symbols for basic crosses F: The symbol F (for filial) denotes the progeny of a cross between two parents. 3 Goulden (1941) proposed a similar system (without Topic 18. Single seed descent can be used in self or cross pollinated crops. 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 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. oil yield. The F 2-derived-family method involved elimination of low-yielding F 2-derived families in replicated yield trials in … The bulk method is similar to single seed descent in that selection was delayed until plants, at F5, were more or less homozygous. This method involves less record keeping ( pedigree method) and works better where the main focus is on improvement of quantitative … It provides a way to speed up the development of inbred lines and reduces the time, 3. This study was conducted to compare the effectiveness between the pedigree selection (PS) and single seed descent (SSD) methods in two yardlong bean crosses. 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. 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. With the bulk method, however, no control is exercised over the contribution which each plant in the population makes to the next generation, whereas, with single seed descent, each F2 plant contributes exactly one de- scendant to the next and subsequent generations. Topic 26. 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.