Marker-assisted selection in segregating generations of self-fertilizing crops

Liu, Pengyuan; Zhu, Jun; Lü, Yan

doi:10.1007/s00122-004-1636-6

Cited by 30 publications

(19 citation statements)

References 26 publications

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“…The calculations in Figure 8 (figure on the right-hand side) show that the contribution decreases with increasing number of accelerated generations. This is in agreement with the trend pointed out by Liu et al (2004) who suggested that MBS is less effective when applied in later generations. In conclusion, our calculations do not substantiate the superiority of systems F 5 + MBS, F 6 + MBS and F 7 + MBS over that of system F 4 + MBS; F 6 + MBS and F 7 + MBS will not be rewardingly effective, while system F 5 + MBS may be selected in some cases when L as well as L 1 is large and the necessary cost can be afforded.…”

Section: Effectiveness Of System F 4 + Mbs Compared To Gab With Longesupporting

confidence: 93%

Marker-based Selection as a Tool for Enhancing the Efficiency of Two Conventional Breeding Methods of Self-fertilizing Crop Plants, the Generation-accelerated Bulk Breeding and Doubled Haploid Breeding

Yonezawa

Ishii

2005

Breed. Sci.

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The effectiveness of marker-based selection (MBS) for enhancing the efficiency of two conventional breeding methods of self-fertilizing crop plants, i.e., generation-accelerated bulk breeding (GAB) and doubled haploid breeding (DHB), is evaluated. When incorporated into GAB, MBS is assumed to be applied in F 2 and F 3 generations based on DNA markers that are linked with desirable trait genes. The effectiveness of MBS is evaluated based on its contribution to increasing the probability of obtaining the desired genotype. Our calculations of the probability show that the effectiveness of MBS depends on the number of trait genes involved in the breeding objective as well as the number of available markers; MBS will produce a great increase in the probability when more than about 12 genes are involved in the breeding objective and markers are available for several or more of these trait genes. In such a case, MBS is useful even when as few as 100 plants are tested in F 2 and F 3 generations, compared to conventional GAB in which 2000 plants are grown for generation acceleration. The effectiveness of MBS increases in the presence of repulsion linkage between desirable trait genes, whereas it decreases in the presence of coupling linkage. Although codominant markers are superior under most practically possible conditions, dominant markers (linked with desirable trait genes) could be superior when relatively few, roughly fewer than 12, genes are involved in the breeding objective and desirable trait genes are linked prevalently in the coupling phase. When MBS is based on more than several codominant markers, it is important to widen the range of the marker genotypes to be selected; not only the best but also the second and third best, partially heterozygous genotypes should be selected. Linkage between trait genes and markers needs not to be perfect; when many markers are available, the advantage of MBS is not lost even with a map distance as long as 10 cM. When desirable trait genes are linked prevalently in the repulsion phase, MBS could effectively be combined with DHB for eliminating unpromising doubled haploid genotypes prior to field test, or for selecting from an F 2 population, plants that should be treated for doubled haploidization.

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Section: Effectiveness Of System F 4 + Mbs Compared To Gab With Longesupporting

confidence: 93%

Marker-based Selection as a Tool for Enhancing the Efficiency of Two Conventional Breeding Methods of Self-fertilizing Crop Plants, the Generation-accelerated Bulk Breeding and Doubled Haploid Breeding

Yonezawa

Ishii

2005

Breed. Sci.

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“…Molecular markers may facilitate gamete selection in the identification of early-generation populations that continue to possess the desired alleles ). Liu et al (2004) found in computer simulations that marker-assisted selection of self-fertilized crops was more advantageous in earlier generations. Marker-assisted selection in early generations allows the elimination of breeding lines having inferior genotypes while maintaining sufficient variability to produce superior breeding lines in later generations.…”

Section: Backcrossmentioning

confidence: 96%

Achievements and limitations of contemporary common bean breeding using conventional and molecular approaches

Beaver

Osorno

2009

Euphytica

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Common bean (Phaseolus vulgaris L.) improvement programs have been successful using conventional breeding methods to accomplish a wide array of important objectives. Specific achievements include the extension of range of adaptation of the crop, the development of cultivars with enhanced levels of disease and pest resistance and breeding lines that possess greater tolerance to drought. The most effective breeding method depends on the expression and inheritance of the trait to be selected and the target environment. Many bean improvement programs use molecular markers to facilitate cultivar development. In fact, several recent germplasm releases have used molecular markers to introgress and or pyramid major genes and QTL for disease resistance. Related species (P. coccineus and P. acultifolius) via interspecific hybridizations remain an important albeit long-term source for resistance to economically important diseases. Slow progress has been made in the improvement of traits such as adaptation to low soil fertility and tolerance to high levels of soluble Al in the soil using conventional breeding methods. The inability to directly measure root traits and the importance of genotype 9 environment interaction complicate the selection of these traits. In addition, symbiotic relationships with Rhizobium and mycorrhiza need to be taken into consideration when selecting for enhanced biological N fixation and greater or more efficient acquisition of soil P. Genomic examination of complex traits such as these should help bean breeders devise more effective selection strategies. As integration of genomics in plant breeding advances, the challenge will be to develop molecular tools that also benefit breeding programs in developing countries. Transgenic breeding methods for bean improvement are not well defined, nor efficient, as beans are recalcitrant to regeneration from cell cultures. Moreover, if issues related to consumer acceptance of GMOs cannot be resolved, traits such as herbicide tolerance in transgenic bean cultivars which would help farmers reduce production costs and decrease soil erosion will remain unrealized.

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“…Data simulated by Liu et al (2004) illustrate that the frequency of superior homozygous genotypes for the main t genotypes is five times higher than that obtained by phenotypic selection in early generations (F 2 to F 4 ) and three times higher than phenotypic selection in the more advanced generations (F 5 to F 7 ). In the SSD method, where phenotypic selection is performed only in advanced generations, MAS used in the early as well as in advanced stages present frequency of superior homozygous genotypes for the main t genotypes three times higher than phenotypic selection in advanced phases.…”

Section: Mas For Qtl In Self-pollination Breeding Programsmentioning

confidence: 78%

“…Liu et al (2004) proposed an index to rank the plants based on the weighted sum of all possible genotypic values.…”

Section: Mas For Qtl In Self-pollination Breeding Programsmentioning

confidence: 99%

Marker-assisted selection for quantitative traits

Schuster¹

2011

Crop Breed. Appl. Biotechnol.

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Marker-assisted selection in segregating generations of self-fertilizing crops

Cited by 30 publications

References 26 publications

Marker-based Selection as a Tool for Enhancing the Efficiency of Two Conventional Breeding Methods of Self-fertilizing Crop Plants, the Generation-accelerated Bulk Breeding and Doubled Haploid Breeding

Marker-based Selection as a Tool for Enhancing the Efficiency of Two Conventional Breeding Methods of Self-fertilizing Crop Plants, the Generation-accelerated Bulk Breeding and Doubled Haploid Breeding

Achievements and limitations of contemporary common bean breeding using conventional and molecular approaches

Marker-assisted selection for quantitative traits

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