Molecular Mechanisms Regulating the Columnar Tree Architecture in Apple

Okada, Kazuma; Honda, C.

doi:10.3390/f13071084

Cited by 5 publications

(2 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The proportion of columnar seedlings from the total of hybrids was close to the value obtained in a similar study containing hybrids of various origins [ 53 ]. If the columnar ideotype was determined by the Co dominant gene [ 54 ], in hybrid combinations with columnar progeny at least one of the parents should have been heterozygous for the Co allele. This is unlikely because it would have resulted in Mendelian segregation of the columnar offspring.…”

Section: Discussionmentioning

confidence: 99%

Quantitative Traits of Interest in Apple Breeding and Their Implications for Selection

Sestraş

Sestraș

2023

Plants

View full text Add to dashboard Cite

Apple breeding is a laborious and long-lasting process that requires qualified resources, land, time, and funds. In this study, more than 5000 F1 apple hybrids from direct and testcrosses were analyzed. The results revealed how the phenotypic expression of the main quantitative traits of interest assessed in five half-sib families was controlled by the additive genetic effects and by non-additive effects of dominance and epistasis. The statistical number of hybrids required to ensure efficient selection increased exponentially with the number of desirable traits. The minimum number of progenies required to obtain a hybrid with associated quantitative traits of agronomic interest was highly variable. For two independent traits essential in selection (fruit size and quality), but incorporated together in the same hybrid, the statistical number was between about 30 and 300. If three more cumulative traits were added (a large number of fruits per tree, resistance/tolerance to apple scab, and powdery mildew attack), the limits increased to between 1500 and 18,000. The study highlighted the need for new apple varieties due to the narrowing of the genetic diversity of the cultivated species and how the choice of parents used in hybridizations (as well as the objectives pursued in the selection) can increase the efficiency of apple breeding.

show abstract

Section: Discussionmentioning

confidence: 99%

Quantitative Traits of Interest in Apple Breeding and Their Implications for Selection

Sestraş

Sestraș

2023

Plants

View full text Add to dashboard Cite

show abstract

“…Overexpression of Co32 did not change the phenotypes in transgenic tobaccos compared to CK and EV (Figure S1), regarding plant height, internode length, leaf size, and branching. According to previous studies, columnar apples have thicker branches than non-columnar apples [40], indicating Co32's possible function in cell wall development. To date, the function of Co33 is not reported.…”

Section: Functional Analysis Of Upregulated Genes In 'Wijcik' Apple C...mentioning

confidence: 90%

Screening Candidate Genes at the Co Locus Conferring to the Columnar Growth Habit in Apple (Malus × Domestica Borkh.)

Guo

Zhao

Chu

et al. 2023

Genes

View full text Add to dashboard Cite

The columnar growth trait of apple (Malus × domestica Borkh.) is genetically controlled by the Columnar (Co) locus on 10 chromosomes, including several candidate genes. Except for MdCo31, other candidate genes at the Co locus are less elucidated. In this study, a strategy of step-by-step screening was adopted to select 11 candidate genes by experimental cloning, transient expression, and genetic transformation. There existed several SNPs in four genes by sequence alignment in columnar and non-columnar apples. Two genes were detected in the nucleus and three genes in the cell membrane, other genes were located in multiple cellular structures by subcellular location. Ectopic expression demonstrated that more branching occurred in MdCo38-OE by upregulating NtPIN1 and NtGA2ox and enlarged leaves in MdCo41-OE tobaccos by upregulating NtCCDs. Transcripts of MdCo38 and MdCo41 were associated with the Co genotypes in apples. The results indicate that MdCo38 and MdCo41 are involved in the columnar growth phenotype in apple, probably through altering polar auxin transport, active gibberellin levels, and strigolactone biosynthesis.

show abstract

Targeted Gene Editing in Pome Fruit Genetics and Breeding: State-of-the-Art, Application Potential and Perspectives

Claessen,

Aert,

De Storme

2023

A Roadmap for Plant Genome Editing

View full text Add to dashboard Cite

Even though traditional breeding of perennial fruit trees such as apple and pear has resulted in high performing cultivars in the past, it is a very lengthy and costly process that is unable to keep up with the increasing demands for improved yield, resistance and fruit quality posed by the growing world population and the rapidly changing climate. In the last decade, significant research advances have been made that can revolutionize pome fruit breeding to meet current needs, including the sequencing of apple and pear genomes, the increased understanding of associations between gene(s) and traits of interest, and the advancement in genetic engineering tools. In particular the emergence of genome-editing tools such as the CRISPR/Cas9 technology can significantly improve the speed and accuracy of pome fruit breeding programs. This chapter reviews the progress, opportunities and challenges of genome editing tools in apple and pear, and discusses the genetic basis of several important breeding goals to find possible targets for new gene-editing applications.

show abstract

Molecular Mechanisms Regulating the Columnar Tree Architecture in Apple

Cited by 5 publications

References 43 publications

Quantitative Traits of Interest in Apple Breeding and Their Implications for Selection

Quantitative Traits of Interest in Apple Breeding and Their Implications for Selection

Screening Candidate Genes at the Co Locus Conferring to the Columnar Growth Habit in Apple (Malus × Domestica Borkh.)

Targeted Gene Editing in Pome Fruit Genetics and Breeding: State-of-the-Art, Application Potential and Perspectives

Contact Info

Product

Resources

About