Note that the outline if for one parental combination and that selection can be practiced in any generation. Accelerated pedigree selection aps involves initial selection based on the assessment of lines rather than individual plants. The results showed that immature 35dayold seeds can be used successfully to turn over a generation of pigeonpea with 100% seed germination. Positive impact of similarity on twice single seed descent of purification on bambara groundnut vigna. Pdf genetical consequences of single seed descent in the.
Hundreds of inbreds have been developed from two parental sets after one parental cross and five generations of inbreds. Mar 29, 2016 single seed descent method this is the classic procedure of having a single seed from each plant, bulking the individual seeds, and planting out the next generation. The single pod descent spd and bulk methods bm produce redundant inbred lines that are descended from either the same f2 or f3 plant. This method uses estimates of the mean m and additive genetic variance d of a. The single seed descent ssd method of selection has been evaluated in safflower carthamus tinctorius l. There were 20 selected local lines evaluated twice with single seed descent method. The ssd method is a very straightforward and cost efficient approach to advancing populations during inbreeding. Breeding methods that do not require hybridization. Search and free download all ebooks, handbook, textbook, user guide pdf files on the internet quickly and easily. Rapid generation advance rga with single seed descent is an effective tool for rice breeders. As well as over 40 free seed promotions, seedsman gives you up to 20% off your order depending on its size. Repeated selfing or singleseed descent is the fastest way to achieve homozygosity with a group or family.
Pdf the theoretical changes in the mean and variance of a segregating. The resulting phase and amplitude functions are then carefully expanded across the traces in an adequately smooth way. Thus, the random bulk method is recommended unless competition effects are important, whereupon single seed descent becomes the preferred method. Note taking is reduced to a simple population number and generation of inbreeding. The north dakota breeding program primarily uses a modified pedigree program and, to a lesser degree, backcross, single seed descent, recurrent selection. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Pdf single seed descent method in plant breeding mugisha.
You can also get free shipping to europe plus double freebies with orders paid by bitcoin. Ppt plant breeding methods powerpoint presentation free. Selection methods an overview sciencedirect topics. 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 method involves heating polycrystalline material in a container above its melting point and slowly cooling it from one end where a seed crystal is located. 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. But the modification is in such a way that it allows the equal survival of a segregates. Comparison of single seed descent, selective intermating and mass. Brief outlines of aps for spring and winter cereals are. Single seed descent ssd is a method that enables plant breeders to advance generations while maintaining genetic variability johnson and bernard 1962. The bridgmann technique is a method of growing single crystal ingots or boules. With plants grown from selfed populations, there is a better probability of finding selfprogeny of all desired traits within a plant.
Jun 18, 2009 read single seed descent as a breeding method for swedes brassica napus l. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. 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. Unlike single seed descent, the multiple seed procedure would allow plant breeders to benefit from divergence in segregation patterns in lines derived from the same fj plant. Single seed descent permits each fj plant to be represented only once in the fg generation. These lines can be derived by accelerated generation procedures. It speeds up the breeding cycle, increases the number of favorable genotypes, and reduces breeding costs. Detection of stable qtls for grain protein content in rice. Backcross breeding method 410 hort 407 1 plant breeding methods i. Pedigree selection was the most effective simulated selection method at high 75 % and.
Single seed descent ssd method includes stages as described below. Feb 06, 2017 an overview of pedigree method being employed in the plant breeding. From each of the selected plants, f3 seeds are harvested, bulked and planted. Transgressive segregation for yield and oil content producing lines with considerably higher values than the better parent was observed in bc 2 f 4 and bc 2 f 5.
Pedigree selection was the most effective simulated selection method at high 75% and. October 4, 2007 at north carolina state university department of crop science. On the first single seed descent, it got similarity coefficient of 0. How does single seed descent differ from the bulk breeding method. Pdf on jan 1, 20, malinee janwan and others published rice breeding for high yield by advanced single seed. Use of immature seed germination and single seed descent for. In soybean, ssd was found to be more efficient than pedigree selection for yield improvement. It is a method of inbreeding a segregating population that is quite conducive to environments that are not typical. Single seed descent 36 offseason sites 36 breeding schemes for pureline cultivars 37 bulk method 37 pedigree method 38 bulkpedigree method 38 modi. Single seed descent method ssd is a modification of bulk method. In a system of rapidgeneration turnover where only a few seeds per plant are produced the bp method can be applied more efficiently than ssd.
Th e following study was conducted in order to compare the modifi ed single seed descent method of selection used in soybean breeding at the institute of field and vegetable crops in novi sad, serbia, with the standard bulk method and the pedigree method. Finally, 200 lines of bc 3 f 4 and bc 3 f 5 were developed by three consecutive backcrossing followed by single seed descent method. Pdf rice breeding for high yield by advanced single seed. There are many selection methods, but no method is perfect for general use with all crop plants. Phase and amplitude tracking for seismic event separation. Request pdf singleseed descent, singlepod, and bulk sampling methods for soybean the single seed descent ssd method of inbreeding minimizes the amount of genetic sampling. Apr 01, 2019 single seed descent method is the modification of bulk method of breeding. Single seed descent is an easy inbreeding strategy aimed at deferring selection in successive.
Using rapid generation advance with single seed descent in. The initial population of this study was a bc 2 f 1 from a cross between a well adapted and a high oil cultivar. Single seed descent method is a selection procedure in which f 2 plants and their progenies are advanced by single seed from each plant until genetic purity is virtually attained i. Nov 29, 2012 the single seed descent ssd method of inbreeding minimizes the amount of genetic sampling. A breeding procedure used with segregating populations of selfpollinated species in which plants are advanced by single seeds from one generation to the. Principles of plant breeding icar e course free pdf book. Malinee janwan, tanee sreewongchai and prapa sripichitt, 20. 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.
Rice breeding for high yield by advanced single seed. The idea of this method was first suggested by goulden 1941 and subsequently modified by brim 1960. Goulden 1941 proposed a similar system without calling it ssd. Singleseed descent is a plant that is selffertilized and the resulting seeds are collected. We re ne this initial solution to account for dispersion and imperfect knowledge of the wavelet at the seed traces by tting the observed data using a gradient descent method. This paper reports the development of an rga technology that integrates the germination of immature seeds with single seed descent method of breeding. Speed breeding in growth chambers and glasshouses for. Download adobe acrobat reader free software to read pdf files. Single seed descent method this is the classic procedure of having a single seed from each plant, bulking the individual seeds, and planting out the next generation. Transgressive segregation for yield and oil content producing lines with considerably higher values than the better parent was observed in bc 2 f 4 and bc 2 f 5 generations. A modified pedigree method of selection in soybeans. Breeding procedure of single seed descent method 3. Rice breeding for high yield by advanced single seed descent method of selection.
Single seed descent in selffertilized crops two main functions are progress toward homozygosity. This study was conducted to compare the effectiveness between the pedigree selection ps and single seed descent ssd methods in two yardlong bean crosses. On the selection for specific genes by single seed descent. The library consists of 6400 m 4 seed pools, each of which was derived from an independent m 1 seed through single seed descent. Breeding methods self pollinated crops single seed descent modified pedigree general outline. This is the classic procedure of having a single seed from each plant, bulking the individual seeds, and planting out the next generation. Th e source materials for the development of hybrid populations were 15 genotypes. As a result of the speed and economy, the single seed descent scheme is becoming increasingly popular with the breeder. Use of the single seed descent method in breeding safflower. Singleseed descent, singlepod, and bulk sampling methods. 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. This minimises the risk of differential mortality or sterility.
Raising of f 3 and later generations from a bulk of one seed from each f2 and subsequent generation plant in order to ensure that each f2 plant is represented equally in the end population. Description two parental lines are crossed to generate f1. Development of uniform f1 hybrid varieties of korean radish. Genstat 5 release 2, reference manual supplement, oxford. Unlike single seed descent ssd, line selection can begin in an early generation.
The efficiency of pedigree and single seed descent selections. The efficiency of pedigree and single seed descent. Three selection methods single seed descent ssd, mass selection and selective intermating were applied simultaneously to a highly heterogeneous and bro. Pedigree method and single seed descent method authorstream. The cost function is minimized using a gradient descent method.
Therefore, the multiple seed procedure of ssd would generate. But, it does not involve selection process mainly artificial, so chances of loosing superior plants are comparatively more and because of the same reason does not eliminate weak plants early such as in other methods. Agronomic performance of lines derived from anther. Principles of plant breeding icar e course free pdf book download e krishi shiksha. Efficiency of single seed descent and early selection in the. Seedsman strongly believes that our loyal customers deserve to be rewarded for trusting us as their cannabis seeds supplier. Development of uniform f1 hybrid varieties of korean.
We have developed a pedigreed mutant library in btx623, the inbred line for generating the reference genome sequence. Read agronomic performance of lines derived from anther culture, maize pollination and single seed descent in a spring wheat cross, tag theoretical and applied genetics on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Pdf single seed descent method in plant breeding mugisha paul academia. Breeders must carefully consider which method will be the most effective for their purposes. Positive impact of similarity on twice single seed descent of. The sb method can be carried out in a number of ways, one of which. The aim of the ssd procedure is to make many homozygous lines in a short time at a low cost.
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