Brett McVittie

Genome‐Wide Association Study Elucidates the Genetic Architecture of Manganese Tolerance in Brassica napus

Harsh Raman, Zetao Bai, Brett McVittie, Hugh D. Goold et autres

ABSTRACT Brassica napus (canola) is a significant contributor to the world's oil production and is cultivated across continents, yet acidic soils with aluminium (Al3+) and manganese (Mn2+) toxicities limit its production. The genetic determinants underlying natural variation for acidic soil tolerance in …

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Genome-wide association study elucidates the genetic architecture of manganese tolerance in Brassica napus

Harsh Raman, Zetao Bai, Brett McVittie, Sourav Mukherjee et autres

Abstract Brassica napus (canola) is a significant contributor to the world’s oil production and is cultivated across continents, yet acidic soils with Al 3+ and Mn 2+ toxicities limit its production. The genetic determinants underlying acidic soil tolerance in canola are unknown …

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Novel quantitative trait loci from an interspecific Brassica rapa derivative improve pod shatter resistance in Brassica napus

Harsh Raman, Rosy Raman, Niharika Sharma, Xiaobo Cui et autres

Pod shatter is a trait of agricultural relevance that ensures plants dehisce seeds in their native environment and has been subjected to domestication and selection for non-shattering types in several broadacre crops. However, pod shattering causes a significant yield reduction in canola …

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Quantitative Trait Loci for Genotype and Genotype by Environment Interaction Effects for Seed Yield Plasticity to Terminal Water-Deficit Conditions in Canola (Brassica napus L.)

Harsh Raman, Nawar Shamaya, Ramethaa Pirathiban, Brett McVittie et autres

Canola plants suffer severe crop yield and oil content reductions when exposed to water-deficit conditions, especially during the reproductive stages of plant development. There is a pressing need to develop canola cultivars that can perform better under increased water-deficit conditions with changing …

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Multienvironment QTL analysis delineates a major locus associated with homoeologous exchanges for water‐use efficiency and seed yield in canola

Harsh Raman, Rosy Raman, Ramethaa Pirathiban, Brett McVittie et autres

Abstract Canola varieties exhibit variation in drought avoidance and drought escape traits, reflecting adaptation to water‐deficit environments. Our understanding of underlying genes and their interaction across environments in improving crop productivity is limited. A doubled haploid population was analysed to identify quantitative …

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Multi-environment QTL analysis delineates a major locus associated with homoeologous exchanges for water-use efficiency and seed yield in allopolyploid Brassica napus

Harsh Raman, Rosy Raman, Ramethaa Pirathiban, Brett McVittie et autres

Summary Canola varieties exhibit discernible variation in drought avoidance and drought escape traits, suggesting its adaptation to water-deficit environments. However, the underlying mechanisms are poorly understood. A doubled haploid (DH) population was analysed to identify QTL associated with water use efficiency (WUE) …

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Genetic and physiological bases for variation in water use efficiency in canola

Harsh Raman, Rosy Raman, Brett McVittie, Lauren Borg et autres

Abstract Drought stress due to water deficiency threatens production of canola worldwide. Carbon isotope discrimination (Δ13C), a trait that can be used to assess efficient water use, provides an opportunity to exploit natural variation in canola for stable production. Here, we show …

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Genome-Wide Association Mapping Identifies Novel Loci for Quantitative Resistance to Blackleg Disease in Canola

Harsh Raman, Brett McVittie, Ramethaa Pirathiban, Rosy Raman et autres

Blackleg disease, caused by the fungal pathogen Leptosphaeria maculans, continues to be a major concern for sustainable production of canola (Brassica napus L.) in many parts of the world. The deployment of effective quantitative resistance (QR) is recognised as a durable strategy …

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Stable Quantitative Resistance Loci to Blackleg Disease in Canola (Brassica napus L.) Over Continents

Harsh Raman, Rosy Raman, Simon Diffey, Yu Qiu et autres

The hemibiotrophic fungus, Leptosphaeria maculans is the most devastating pathogen, causing blackleg disease in canola (Brassica napus L). To study the genomic regions involved in quantitative resistance (QR), 259 to 276 DH lines from Darmor-bzh/Yudal (DYDH) population were assessed for resistance to …

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Genomic selection in global diversity pools-a new paradigm for pre-breeding in canola

Harsh Raman, Robert Banks, Shengyi Liu, Rosy Raman et autres

We propose a new paradigm for pre-breeding in canola based on genomic selection in a globally diverse pool of Brassica napus germplasm. The base population comprising over 400 diverse canola lines representing global genetic diversity in the crop was developed at NSW …

A Major Locus for Manganese Tolerance Maps on Chromosome A09 in a Doubled Haploid Population of Brassica napus L.

Harsh Raman, Rosy Raman, Brett McVittie, B. Orchard et autres

Soil acidity poses a major threat to productivity of several crops; mainly due to the prevalence of toxic levels of Al3+ and Mn2+. Crop productivity could be harnessed on acid soils via the development of plant varieties tolerant to phytotoxic levels of …

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Relative tolerance to aluminium and manganese toxicities of Phalaris, cocksfoot, and tall fescue genotypes developed for low rainfall environments

Yantao Song, Richard C. Hayes, G. A. Sandral, Brett McVittie et autres

New breeding lines of Phalaris (Phalaris aquatica), cocksfoot (Dactylis glomerata) and tall fescue (Festuca arundinacea = syn. Lolium arundinaceum) are currently under evaluation for the selection of new cultivars for low rainfall environments. The aim was to test the relative tolerance of …

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