14 Result(s)
within
John McCallum
Life Sciences
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Article
Open AccessImplementation of different relationship estimate methodologies in breeding value prediction in kiwiberry (Actinidia arguta)
In dioecious crops such as Actinidia arguta (kiwiberries), some of the main challenges when breeding for fruit characteristics are the selection of potential male parents and the long juvenile period. Currently, ...
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Article
Open AccessA manually annotated Actinidia chinensis var. chinensis (kiwifruit) genome highlights the challenges associated with draft genomes and gene prediction in plants
Most published genome sequences are drafts, and most are dominated by computational gene prediction. Draft genomes typically incorporate considerable sequence data that are not assigned to chromosomes, and pre...
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Chapter
Gene Family Evolution in Allium Species
During evolution, plant genomes have undergone duplications, deletions and rearrangements resulting in a wide variation in genome size and number of gene family members between different species. The variation...
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Molecular Map** of Genes and QTL: Progress to Date and Development of New Population Resources for NGS Genetics
Ability to conduct molecular analyses in Allium species was previously limited by the power of available technologies to sample very large heterozygous genomes in a cost-effective manner. The emergence of third-g...
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Article
A DNA-based diagnostic for differentiating among New Zealand endemic Podocarpus
Species of the genus Podocarpus are primarily found in the Southern Hemisphere. In New Zealand, there are four endemic species—Podocarpus acutifolius, Podocarpus nivalis, Podocarpus totara and Podocarpus cunningh...
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Article
Genetic analyses of bolting in bulb onion (Allium cepa L.)
We present the first evidence for a QTL conditioning an adaptive trait in bulb onion, and the first linkage and population genetics analyses of candidate genes involved in photoperiod and verna...
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Article
Development of robust genomic simple sequence repeat markers for estimation of genetic diversity within and among bulb onion (Allium cepa L.) populations
Improved understanding of genetic diversity in onion and shallot (Allium cepa L.) is required to inform breeding and genetic resource conservation, and to enable development of association genetics and seed quali...
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Article
Open AccessAlliumMap-A comparative genomics resource for cultivated Allium vegetables
Vegetables of the genus Allium are widely consumed but remain poorly understood genetically. Genetic map** has been conducted in intraspecific crosses of onion (Allium cepa L.), A. fistulosum and interspecific ...
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Article
Pilot sequencing of onion genomic DNA reveals fragments of transposable elements, low gene densities, and significant gene enrichment after methyl filtration
Sequencing of the onion (Allium cepa) genome is challenging because it has one of the largest nuclear genomes among cultivated plants. We undertook pilot sequencing of onion genomic DNA to estimate gene densities...
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Article
Genetic map** of sulfur assimilation genes reveals a QTL for onion bulb pungency
Onion exhibits wide genetic and environmental variation in bioactive organosulfur compounds that impart pungency and health benefits. A PCR-based molecular marker map that included candidate genes for sulfur a...
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Onion
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Article
Genetic map** of a major gene affecting onion bulb fructan content
The non-structural dry matter content of onion bulbs consists principally of fructose, glucose, sucrose and fructans. The objective of this study was to understand the genetic basis for the wide variation obse...
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Article
Genetic map** of expressed sequences in onion and in silico comparisons with rice show scant colinearity
The Poales (which include the grasses) and Asparagales [which include onion (Allium cepa L.) and other Allium species] are the two most economically important monocot orders. Enormous genomic resources have been ...
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Article
Sulfur and nitrogen fertility affects flavour of field-grown onions
Although glasshouse studies have conclusively demonstrated that S nutrition can affect onion (Allium cepaL.) pungency this has been rarely observed in field-based studies due to difficulties in controlling S nutr...
