The reproductive biology of the potato and its implication for breeding

HannemanJr, R. E.

doi:10.1007/bf02357859

Cited by 39 publications

(24 citation statements)

References 175 publications

(194 reference statements)

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“…The allele fs is responsible for the merging of the two chromosomes sets, also in metaphase II. These two alleles promote the first division restitution (Hanneman, 1999). The products of the pc1 and pc2 genes are responsible for the omission of the second meiotic division, causing premature cytokinesis with the formation of dyads or triads (Mok and Peloquin, 1975).…”

Section: Discussionmentioning

confidence: 99%

Implications of mitotic and meiotic irregularities in common beans (Phaseolus vulgaris L.)

et al. 2016

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ABSTRACT. The common bean has great social and economic importance in Brazil and is the subject of a high number of publications, especially in the fields of genetics and breeding. Breeding programs aim to increase grain yield; however, mitosis and meiosis represent under explored research areas that have a direct impact on grain yield. Therefore, the study of cell division could be another tool available to bean geneticists and breeders. The aim of this study was to investigate irregularities occurring during the cell cycle and meiosis in common bean. The common bean cultivar used was BRSMG Talismã, which owing to its high yield and grain quality is recommended for cultivation in Brazil. We classified the interphase nuclei, estimated the mitotic and meiotic index, grain pollen viability, and percentage of abnormalities in both processes. The mitotic index was 4.1%, the interphase nucleus was non-reticulated, and 19% of dividing somatic cells showed abnormal behavior. Meiosis also presented irregularities resulting in a meiotic index of 44.6%. Viability of pollen grains was 94.3%. These results indicate that the common bean cultivar BRSMG Talismã possesses repair mechanisms that compensate for changes by producing a large number of pollen grains. Another important strategy adopted by bean plants to ensure stability is the elimination of abnormal cells by apoptosis. As the common bean cultivar BRSMG Talismã is recommended for cultivation because of its good agronomic performance, it can be concluded that mitotic and meiotic irregularities have no negative influence on its grain quality and yield.

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Section: Discussionmentioning

confidence: 99%

Implications of mitotic and meiotic irregularities in common beans (Phaseolus vulgaris L.)

et al. 2016

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“…Dihaploid x wild species hybrids can be crossed with cultivated potato via unilateral sexual polyploidization (4x -2x crosses) using 2n gametes. Also, two dihaploid x wild species hybrids that produce 2n pollen and 2n eggs can be crossed in a bilateral sexual polyploidization (2x -2x crosses) to create novel tetraploids (Hermsen 1994, Hanneman 1999. It is reasonable that the wild parent should be selected for important traits as tuberization, tuber quality traits, tolerance to environmental stresses and resistance to diseases and pests, sexual fertility and 2n gamete production before crossing with dihaploids.…”

Section: Important Characteristis Of Vegetatively Propagated Cropsmentioning

confidence: 99%

“…It is reasonable that the wild parent should be selected for important traits as tuberization, tuber quality traits, tolerance to environmental stresses and resistance to diseases and pests, sexual fertility and 2n gamete production before crossing with dihaploids. Therefore, the knowledge and use of endosperm balance number, dihaploids and 2n gametes made available a wide range of the Solanum genetic diversity to potato breeders (Hanneman 1999).…”

Section: Important Characteristis Of Vegetatively Propagated Cropsmentioning

confidence: 99%

Breeding vegetatively propagated horticultural crops

Bisognin

2011

Crop Breed. Appl. Biotechnol.

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-Horticulture is an important part of agriculture with many important crops being vegetatively propagated. The objectives of this work were to discuss some of the most important characteristics of vegetatively propagated crops and the breeding strategies to develop and propagate new cultivars. Vegetative propagation enables to fix favorable combinations of important traits, very specific chemical compositions, superior genetic variance interactions and high levels of heterozygosity. Breeding new cultivars involve few possibilities of genetic recombination by sexual reproduction and many generations of selection and vegetative propagation. Marker assisted selection should be useful for genotyping and selecting complementary parents for crossing and for identifying superior genotypes at early stages of selection. The tissue culture technique enables to get disease free stock plants and to maximize its multiplication rate, having an important role in yield and quality of these crops.

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“…Several approaches for direct introgression into cultivated potato have been used to overcome reproductive barriers between potato species. These include embryo rescue with and without auxin treatment (Dinu et al 2005), double pollination, ploidy manipulations, and somatic hybridization (Helgeson et al 1998;Hanneman 1999). Application of these methods to obtain sexual F 1 progeny in direct crosses with Mexican species has been difficult (Novy and Hanneman 1991;Kuhl et al 2002;Ramon and Hanneman 2002;Dinu et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Unilateral and bilateral hybridization barriers in inter-series crosses of 4x 2EBN Solanum stoloniferum, S. pinnatisectum, S. cardiophyllum, and 2x 2EBN S. tuberosum haploids and haploid-species hybrids

2005

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Wild Mexican potato species are an important untapped source of useful variation for potato improvement. Introgression methods such as 2n gametes, chromosome doubling, and crossing with disomic 4x 2 endosperm balance number (EBN) bridge species have been used to overcome post-zygotic endosperm failure according to the EBN hypothesis. Stylar barriers can prevent zygote formation, bilaterally when zygote formation is blocked in both directions of the cross or unilaterally when zygote formation is blocked in self incompatible (SI) · self compatible (SC) crosses. In several Solanaceae species, the S-locus for SI has been implicated in interspecific incompatibility. The objectives of this research were to determine if: (1) disomic 4x 2EBN Solanum stoloniferum can be used as a bridge species for introgression of the Mexican 2x 1EBN species Solanum cardiophyllum and Solanum pinnatisectum, (2) pre-and/ or post-zygotic barriers limit hybridization among EBN compatible Solanum inter-series crosses, and (3) reproductive barriers act unilaterally or bilaterally. Fruit formation and seed set was recorded for inter-pollinations of S. stoloniferum, 4x 2EBN chromosome doubled S. cardiophyllum and S. pinnatisectum, and 2x 2EBN S. tuberosum haploids (HAP) or haploid-species hybrids (H-S). In vivo pollen tube growth was analyzed for each cross combination with fluorescence microscopy. Attempts to create bridge hybrids between S. stoloniferum, and S. cardiophyllum or S. pinnatisectum were not successful. Pre-and post-zygotic barriers prevented seed formation in crosses involving S. cardiophyllum and S. pinnatisectum. Self compatibility in S. stoloniferum and S. pinnatisectum suggests that the S-locus does not contribute to the stylar barriers observed with these species. Alternatively, the presence of functional and nonfunctional (SC) S-alleles may explain interspecific incompatibility in intra-and inter-ploidy crosses. A non-stylar unilateral incongruity was discovered in H-S/HAP · S. stoloniferum crosses, indicating either a post-zygotic barrier, or a pre-zygotic barrier acting at or within the ovary. Furthermore, lack of S. stoloniferum pollen rejection may occur through absence of S. stoloniferum pollenactive genes needed to initiate pollen rejection, or through competitive interaction in S-locus heterozygous S. stoloniferum pollen. Introgression strategies using these species would benefit potato breeding by introducing genetic diversity for several traits simultaneously through co-current introgression.

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The reproductive biology of the potato and its implication for breeding

Cited by 39 publications

References 175 publications

Implications of mitotic and meiotic irregularities in common beans (Phaseolus vulgaris L.)

Implications of mitotic and meiotic irregularities in common beans (Phaseolus vulgaris L.)

Breeding vegetatively propagated horticultural crops

Unilateral and bilateral hybridization barriers in inter-series crosses of 4x 2EBN Solanum stoloniferum, S. pinnatisectum, S. cardiophyllum, and 2x 2EBN S. tuberosum haploids and haploid-species hybrids

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