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. Search and free download all ebooks, handbook, textbook, user guide pdf files on the internet quickly and easily. Positive impact of similarity on twice single seed descent of purification on bambara groundnut vigna. The efficiency of pedigree and single seed descent selections.
Single seed descent permits each fj plant to be represented only once in the fg generation. Using rapid generation advance with single seed descent in. This method uses estimates of the mean m and additive genetic variance d of a. Use of the single seed descent method in breeding safflower. Principles of plant breeding icar e course free pdf book. This minimises the risk of differential mortality or sterility. Rice breeding for high yield by advanced single seed.
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. 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. On the selection for specific genes by single seed descent. Breeding methods that do not require hybridization. A breeding procedure used with segregating populations of selfpollinated species in which plants are advanced by single seeds from one generation to the. Backcross breeding method 410 hort 407 1 plant breeding methods i. Single seed descent in selffertilized crops two main functions are progress toward homozygosity. Jun 18, 2009 read single seed descent as a breeding method for swedes brassica napus l. Rice breeding for high yield by advanced single seed descent method of selection. There are many selection methods, but no method is perfect for general use with all crop plants. The ssd method is a very straightforward and cost efficient approach to advancing populations during inbreeding. Breeding methods self pollinated crops single seed descent modified pedigree general outline. Malinee janwan, tanee sreewongchai and prapa sripichitt, 20. With plants grown from selfed populations, there is a better probability of finding selfprogeny of all desired traits within a plant.
The single seed descent ssd method of selection has been evaluated in safflower carthamus tinctorius l. 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. Goulden 1941 proposed a similar system without calling it ssd. Efficiency of single seed descent and early selection in the. Phase and amplitude tracking for seismic event separation. Pedigree selection was the most effective simulated selection method at high 75% and moderate 50% heritabilities. 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. Repeated selfing or singleseed descent is the fastest way to achieve homozygosity with a group or family. A modified pedigree method of selection in soybeans. Agronomic performance of lines derived from anther.
Singleseed descent, singlepod, and bulk sampling methods. The cost function is minimized using a gradient descent method. Speed breeding in growth chambers and glasshouses for. Comparison of single seed descent, selective intermating and mass. Pdf single seed descent method in plant breeding mugisha paul academia.
This study was conducted to compare the effectiveness between the pedigree selection ps and single seed descent ssd methods in two yardlong bean crosses. 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. 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. Therefore, the multiple seed procedure of ssd would generate. 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. 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 ssd method includes stages as described below. Hundreds of inbreds have been developed from two parental sets after one parental cross and five generations of inbreds. Pedigree selection was the most effective simulated selection method at high 75% and. Three selection methods single seed descent ssd, mass selection and selective intermating were applied simultaneously to a highly heterogeneous and bro. The results showed that immature 35dayold seeds can be used successfully to turn over a generation of pigeonpea with 100% seed germination. These lines can be derived by accelerated generation procedures. On the first single seed descent, it got similarity coefficient of 0. 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. The bridgmann technique is a method of growing single crystal ingots or boules. Th e source materials for the development of hybrid populations were 15 genotypes. Seedsman strongly believes that our loyal customers deserve to be rewarded for trusting us as their cannabis seeds supplier. The efficiency of pedigree and single seed descent. Breeders must carefully consider which method will be the most effective for their purposes.
October 4, 2007 at north carolina state university department of crop science. Pdf the theoretical changes in the mean and variance of a segregating. Pdf rice breeding for high yield by advanced single seed. It is a method of inbreeding a segregating population that is quite conducive to environments that are not typical. Pdf genetical consequences of single seed descent in the. Rice breeding for high yield by advanced single seed descent. You can also get free shipping to europe plus double freebies with orders paid by bitcoin. 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. As well as over 40 free seed promotions, seedsman gives you up to 20% off your order depending on its size. 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. Apr 01, 2019 single seed descent method is the modification of bulk method of breeding. The north dakota breeding program primarily uses a modified pedigree program and, to a lesser degree, backcross, single seed descent, recurrent selection. It speeds up the breeding cycle, increases the number of favorable genotypes, and reduces breeding costs.
Single seed descent method ssd is a modification of bulk method. Note that the outline if for one parental combination and that selection can be practiced in any generation. Note taking is reduced to a simple population number and generation of inbreeding. 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.
Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. This paper reports the development of an rga technology that integrates the germination of immature seeds with single seed descent method of breeding. In soybean, ssd was found to be more efficient than pedigree selection for yield improvement. Single seed descent is an easy inbreeding strategy aimed at deferring selection in successive. 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 this is the classic procedure of having a single seed from each plant, bulking the individual seeds, and planting out the next generation. 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. Pdf on jan 1, 20, malinee janwan and others published rice breeding for high yield by advanced single seed. Brief outlines of aps for spring and winter cereals are. How does single seed descent differ from the bulk breeding method. The single pod descent spd and bulk methods bm produce redundant inbred lines that are descended from either the same f2 or f3 plant.
The resulting phase and amplitude functions are then carefully expanded across the traces in an adequately smooth way. Unlike single seed descent ssd, line selection can begin in an early generation. From each of the selected plants, f3 seeds are harvested, bulked and planted. The sb method can be carried out in a number of ways, one of which. Feb 06, 2017 an overview of pedigree method being employed in the plant breeding. Detection of stable qtls for grain protein content in rice. Use of immature seed germination and single seed descent for. Principles of plant breeding icar e course free pdf book download e krishi shiksha. 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. 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. Pdf single seed descent method in plant breeding mugisha. Ppt plant breeding methods powerpoint presentation free.
Accelerated pedigree selection aps involves initial selection based on the assessment of lines rather than individual plants. There were 20 selected local lines evaluated twice with single seed descent method. 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. As a result of the speed and economy, the single seed descent scheme is becoming increasingly popular with the breeder. Genstat 5 release 2, reference manual supplement, oxford. Download adobe acrobat reader free software to read pdf files. The idea of this method was first suggested by goulden 1941 and subsequently modified by brim 1960. Description two parental lines are crossed to generate f1. Breeding procedure of single seed descent method 3. 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 library consists of 6400 m 4 seed pools, each of which was derived from an independent m 1 seed through single seed descent. 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. Selection methods an overview sciencedirect topics. Positive impact of similarity on twice single seed descent of. Single seed descent ssd is a method that enables plant breeders to advance generations while maintaining genetic variability johnson and bernard 1962. Pedigree method and single seed descent method authorstream. 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. Pedigree selection was the most effective simulated selection method at high 75 % and.
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. But the modification is in such a way that it allows the equal survival of a segregates. The aim of the ssd procedure is to make many homozygous lines in a short time at a low cost.
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