Ear Development of some Local and Australian wheat Varieties in Different Temperature Regimes

1999 ◽  
Vol 2 (1) ◽  
pp. 70-80
Author(s):  
Ahmad H. A. Hama Rashid ◽  
Keyword(s):  
Wheat Varieties ◽  
Ear Development ◽  
Temperature Regimes ◽  
Australian Wheat

Variation in skikelet initiation and ear development of old and modern Australian wheat varieties

1989 ◽  
Vol 20 (2) ◽  
pp. 113-128 ◽  
Author(s):  
E.J.M. Kirby ◽  
K.H.M. Siddique ◽  
M.W. Perry ◽  
D. Kaesehagen ◽  
W.R. Stern
Keyword(s):  
Wheat Varieties ◽  
Ear Development ◽  
Australian Wheat

Australian Wheat Varieties

1983 ◽  
Author(s):  
RW Fitzsimmons ◽  
RH Martin ◽  
CW Wrigley
Keyword(s):  
Seed Production ◽  
Growth Stages ◽  
Wheat Grain ◽  
Wheat Varieties ◽  
Broad Audience ◽  
Grain Trade ◽  
Australian Wheat

This handbook provides a practical description of wheat grain, heads and plants at several growth stages. It is designed to assist in distinguishing varieties currently grown throughout Australia, in the regions where each is usually grown. It is directed at a broad audience, including those involved with the grain trade at all stages, from seed production, through growing and harvesting, to receival and segregation, sales and utilization. Although Australia-wide in its overall approach, it is hoped that the handbook will form a basis to meet specialised local needs. Thus smaller sets of sheets, relating to local groups of varieties, might be selected and additional comments added, in the space provided, relating to the particular locality and season. In such a case, the characters that show the greatest differences between the particular varieties should be selected for identification.

The effect of stripe rust on the quality of Australian wheat varieties

1990 ◽  
Vol 41 (5) ◽  
pp. 827 ◽  
Author(s):  
L O'Brien ◽  
JS Brown ◽  
JF Panozzo ◽  
MJ Archer
Keyword(s):  
Stripe Rust ◽  
Field Experiments ◽  
Grain Protein Content ◽  
Wheat Varieties ◽  
Flour Milling ◽  
Australian Wheat ◽  
Dough Development Time ◽  
Milling Yield ◽  
Disease Free

The effect of stripe rust on the processing quality of Australian wheat varieties was examined over a four year period. Each year in field experiments, stripe rust was allowed to develop naturally on one half of each plot block while the other was kept disease free using three weekly applications of fungicide. Changes in grain quality were observed with susceptible varieties when subjected to an epiphytotic of the disease. Stripe rust caused kernels to be shrivelled, which resulted in reduced test weight and flour milling yield and increased grain protein content. Dough properties were also affected. Dough development time was shorter, mixing tolerance deteriorated and extensograph maximum resistance was lower for susceptible varieties affected by the disease.

scholarly journals Strengths and Weaknesses of National Variety Trial Data for Multi-Environment Analysis: A Case Study on Grain Yield and Protein Content

Agronomy ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 753 ◽  
Author(s):  
Vahid Rahimi Eichi ◽  
Mamoru Okamoto ◽  
Trevor Garnett ◽  
Paul Eckermann ◽  
Benoit Darrier ◽  
...  
Keyword(s):  
Grain Yield ◽  
Protein Content ◽  
Complex Traits ◽  
Wheat Varieties ◽  
Environment Analysis ◽  
Environment Study ◽  
Australian Wheat ◽  
The Impact ◽  
The Relationship

Multi-environment trial studies provide an opportunity for the detailed analysis of complex traits. However, conducting trials across a large number of regions can be costly and labor intensive. The Australian National Variety Trials (NVT) provide grain yield and protein content (GPC) data of over 200 wheat varieties in many and varied environments across the Australian wheat-belt and is representative of similar trials conducted in other countries. Through our analysis of the NVT dataset, we highlight the advantages and limitations in using these data to explore the relationship between grain yield and GPC in the low yielding environments of Australia. Eight environment types (ETs), categorized in a previous study based on the time and intensity of drought stress, were used to analyze the impact of drought on the relationship between grain yield and protein content. The study illustrates the value of comprehensive multi-environment analysis to explore the complex relationship between yield and GPC, and to identify the most appropriate environments to select for a favorable relationship. However, the NVT trial design does not follow the rigor associated with a normal genotype × environment study and this limits the accuracy of the interpretation.

Australian Wheat Varieties Supplement No.1

1985 ◽  
Author(s):  
RW Fitzsimmons ◽  
RH Martin ◽  
CW Wrigley
Keyword(s):  
Close Relative ◽  
Wheat Varieties ◽  
Australian Wheat

With the continuing improvement of wheat, there is a need to provide assistance in the identification of newly registered wheat varieties. Sixteen such wheats are described in this Supplement according to the characters explained in 'Australian wheat varieties: identification according to plant, head and grain characteristics', Second Edition, by R. W. Fitzsimmons, R. H. Martin and C. W. Wrigley (CSIRO: Melbourne, 1983). In addition, descriptions of eight Australian triticales are provided in this Supplement as an appendix, in view of the increasing popularity of this close relative of wheat.

Evolving usage of materials from CIMMYT in developing Australian wheat varieties

2006 ◽  
Vol 57 (9) ◽  
pp. 947 ◽  
Author(s):  
John P. Brennan ◽  
Kathryn J. Quade
Keyword(s):  
Developing Countries ◽  
Wheat Varieties ◽  
Breeding Programs ◽  
Wheat Improvement ◽  
Australian State ◽  
Australian Wheat ◽  
Different Origins ◽  
Over Time

Wheat genetic materials developed at the International Maize and Wheat Improvement Center (CIMMYT) in Mexico for developing countries and varieties developed from those genetic materials have resulted in yield increases in Australia. The usage of the genetic materials obtained from CIMMYT has evolved over time, with fewer Australian varieties resulting from either direct CIMMYT crosses or having a CIMMYT line as a parent. There has been an increasing tendency to use adapted Australian lines with CIMMYT ancestry, rather than CIMMYT lines, as parents. These changes are examined, both in terms of varieties released in Australia and for the shares of wheat area sown to crosses of different origins, for each Australian state. The results demonstrate that for the benefits of international developments to be made available to Australian producers, Australian-based breeding programs are essential.

Molecular characterisation of the NAM-1 genes in bread wheat in Australia

2018 ◽  
Vol 69 (12) ◽  
pp. 1173 ◽  
Author(s):  
Rongchang Yang ◽  
Angela Juhasz ◽  
Yujuan Zhang ◽  
Xueyan Chen ◽  
Yinjun Zhang ◽  
...  
Keyword(s):  
Triticum Aestivum L ◽  
Grain Protein Content ◽  
Molecular Characterisation ◽  
Nucleotide Polymorphisms ◽  
Wild Type ◽  
Wheat Varieties ◽  
Gene Variation ◽  
B1 Gene ◽  
Australian Wheat ◽  
Functional Alleles

The wheat NAM-B1 and NAM-A1 genes are positively associated with grain protein content (GPC) in wheat. We conducted molecular characterisation of the NAM-1 genes in 51 Australian wheat varieties (Triticum aestivum L.), with the aim of improving GPC and nitrogen-usage efficiency in Australian wheat. In summary, the wild type NAM-B1 gene, which originated from Israel, was identified in two Australian wheat varieties. Five varieties contained a deletion allele, whereas the majority (43) harboured a non-functional NAM-B1 allele and one variety contained both functional and non-functional alleles. Twenty-six Australian wheat varieties contained the NAM-A1a haplotype, which was similar to its well-characterised homoeolog NAM-B1 wild type and associated with high GPC. The NAM-D1 gene in the 51 wheat varieties was also characterised, and no gene variation in the exon regions was noted; only two single-nucleotide polymorphisms in introns 1 and 2 were found among the 51 varieties.

The Effect of High Temperature on Kernel Development in Wheat: Variability Related to Pre-Heading and Post-Anthesis Conditions

1994 ◽  
Vol 21 (6) ◽  
pp. 731 ◽  
Author(s):  
IF Wardlaw
Keyword(s):  
High Temperature ◽  
Temperature Tolerance ◽  
Kernel Weight ◽  
Light Penetration ◽  
Kernel Size ◽  
Low Light ◽  
Kernel Development ◽  
Ear Development ◽  
High Temperature Tolerance ◽  
Australian Wheat

In wheat, mean temperatures greater than 15-18�C following anthesis can result in a decrease in kernel weight at maturity, and breeding for high temperature tolerance during kernel filling could provide a significant increase in yield in large parts of the Australian wheat belt. The response of kernel filling to high temperature, however, varies from planting to planting and this variation has been shown to be related to both pre-heading and post-anthesis conditions. Thus high temperature (27/22�C), or low light (50% shade) during ear development can reduce the response of the developing grain to high temperature (30/25�C) following anthesis. In contrast, low light during kernel filling enhances the response to high temperature, resulting in a relatively greater reduction in kernel size. The latter response suggests that the slightly greater sensitivity to high temperature of grains from plants allowed to tiller freely in comparison with the responses observed using single culms, may be related to differences in light penetration of the canopy. This variation in response to high temperature, although not appearing to change the order of tolerance across cultivars, can create difficulties in selecting for high temperature tolerance over a number of generations, and can account for the apparent low heritability (h2 = 0.2) of high temperature tolerance determined here from a cross between the cultivars Kalyansona and Pinnacle.

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