scholarly journals 100 Gy60Coγ-Ray Induced Novel Mutations in Tetraploid Wheat

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Chuntao Yang ◽  
Jianshu Zhu ◽  
Yun Jiang ◽  
Xiaolu Wang ◽  
Mengxue Gu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Seed Germination ◽  
Chinese Spring ◽  
Germination Rate ◽  
Tetraploid Wheat ◽  
Wheat Breeding ◽  
Glutenin Subunits ◽  
Novel Mutations ◽  
Meiotic Process ◽  
Mother Cells

10 accessions of tetraploid wheat were radiated with 100 Gy60Coγ-ray. The germination energy, germination rate, special characters (secondary tillering, stalk with wax powder, and dwarf), meiotic process, and high-molecular-weight glutenin subunits (HMW-GSs) were observed. Different species has different radiation sensibility. With 1 seed germinated (5%),T. dicoccum(PI434999) is the most sensitive to this dose of radiation. With a seed germination rate of 35% and 40%, this dose also affectedT. polonicum(As304) andT. carthlicum(As293). Two mutant dwarf plants,T. turgidum(As2255) 253-10 andT. polonicum(As302) 224-14, were detected. Abnormal chromosome pairings were observed in pollen mother cells of bothT. dicoccoides(As835) 237-9 andT. dicoccoides(As838) 239-8 with HMW-GS 1Ax silent in seeds from them. Compared with the unirradiated seed ofT. polonicum(As304) CK, a novel HMW-GS was detected in seed ofT. polonicum(As304) 230-7 and its electrophoretic mobility was between 1By8 and 1Dy12 which were the HMW-GSs of Chinese Spring. These mutant materials would be resources for wheat breeding.

Composition of and variation in high- and low-molecular weight glutenin subunits, and omega gliadins in Ethiopian tetraploid wheat germplasm

2006 ◽  
Vol 4 (2) ◽  
pp. 134-143 ◽  
Author(s):  
Faris Hailu ◽  
Eva Johansson ◽  
Arnulf Merker ◽  
Getachew Belay ◽  
Harjit-Singh ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Tetraploid Wheat ◽  
Glutenin Subunit ◽  
Low Molecular Weight ◽  
Glutenin Subunits ◽  
Hmw Glutenin Subunits ◽  
Lmw Glutenin Subunits ◽  
Hmw Glutenin ◽  
Omega Gliadins ◽  
High Degree

A collection of 120 Ethiopian tetraploid wheat accessions was analysed for high-molecular weight (HMW) glutenin subunit, low-molecular weight (LMW) glutenin subunit and omega gliadin composition by SDS–PAGE. For the HMW glutenin subunits, a new allelic variant, 2****, was detected which has not been previously described at the Glu-A1 locus. A high proportion of Glu-A1x banding pattern was observed in durum wheat. For the Glu-B1 locus four different banding patterns were detected. Among those HMW glutenin subunits, 7+8 were the most common, while subunits 14+15 and 6+8 were found to be rare. A high degree of variation was evident for the LMW glutenin subunits and D-zone omega gliadins. The association of the composition of the gluten with quality has been discussed. This wide variation can be used in improving the quality of wheat and to widen its genetic base.

Amphidiploids between tetraploid wheat and Aegilops sharonensis Eig exhibit variations in high-molecular-weight glutenin subunits

2014 ◽  
Vol 61 (2) ◽  
pp. 299-305 ◽  
Author(s):  
Qian-Tao Jiang ◽  
Quan-Zhi Zhao ◽  
Qiang Yang ◽  
Jian Ma ◽  
Xiao-Wei Zhang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Tetraploid Wheat ◽  
Glutenin Subunits ◽  
Aegilops Sharonensis

scholarly journals A MALDI-TOF based analysis of high molecular weight glutenin subunits for wheat breeding

2009 ◽  
Vol 50 (2) ◽  
pp. 295-301 ◽  
Author(s):  
Li Liu ◽  
Aili Wang ◽  
Rudi Appels ◽  
Junhong Ma ◽  
Xianchun Xia ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Wheat Breeding ◽  
Glutenin Subunits ◽  
Maldi Tof

scholarly journals Genetic diversity of high and low molecular weight glutenin subunits in Saharan bread and durum wheats from Algerian oases

2012 ◽  
Vol 48 (No. 1) ◽  
pp. 23-32 ◽  
Author(s):  
I. Bellil ◽  
M. Chekara Bouziani ◽  
D. Khelifi
Keyword(s):  
Genetic Diversity ◽  
Molecular Weight ◽  
Durum Wheat ◽  
Bread Wheat ◽  
Allelic Variation ◽  
Low Molecular Weight ◽  
Glutenin Subunits ◽  
Lmw Glutenin Subunits ◽  
Genotypic Identification ◽  
Diversity Studies

Saharan wheats have been studied particularly from a botanical viewpoint. Genotypic identification, classification and genetic diversity studies to date were essentially based on the morphology of the spike and grain. For this, the allelic variation at the glutenin loci was studied in a set of Saharan bread and durum wheats from Algerian oases where this crop has been traditionally cultivated. The high molecular weight and low molecular weight glutenin subunit composition of 40 Saharan bread and 30 durum wheats was determined by SDS-PAGE. In Saharan bread wheats 32 alleles at the six glutenin loci were detected, which in combination resulted in 36 different patterns including 17 for HMW and 23 for LMW glutenin subunits. For the Saharan durum wheats, 29 different alleles were identified for the five glutenin loci studied. Altogether, 29 glutenin patterns were detected, including 13 for HMW-GS and 20 for LMW-GS. Three new alleles were found in Saharan wheats, two in durum wheat at the Glu-B1 and Glu-B3 loci, and one in bread wheat at the Glu-B1 locus. The mean indices of genetic variation at the six loci in bread wheat and at the five loci in durum wheat were 0.59 and 0.63, respectively, showing that Saharan wheats were more diverse. This information could be useful to select Saharan varieties with improved quality and also as a source of genes to develop new lines when breeding for quality.

Identification of low-molecular weight glutenin subunits of wheat associated with bread-making quality

2004 ◽  
Vol 123 (4) ◽  
pp. 355-360 ◽  
Author(s):  
W. Maruyama-Funatsuki ◽  
K. Takata ◽  
Z. Nishio ◽  
T. Tabiki ◽  
E. Yahata ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Low Molecular Weight ◽  
Glutenin Subunits ◽  
Bread Making

scholarly journals TEMPERATURE - GERMINATION RESPONSES OF SUNFLOWER (Helianthus annuus L.) GENOTYPES / GERMINACION COMO REACCION A LA TEMPERATURA EN LOS GENOTIPOS DEL GIRASOL (Helianthus annuus L.) / GERMINATION - RÉACTION À LA TEMPÉRATURE DANS LES GÉNOTYPES DE TOURNESOL (Helianthus annuus L.)

Helia ◽  
2000 ◽  
Vol 23 (33) ◽  
pp. 97-104
Author(s):  
F.M. Khalifa ◽  
A.A. Schneiter ◽  
E.I. El Tayeb
Keyword(s):  
Seed Germination ◽  
Helianthus Annuus ◽  
Maximum Rate ◽  
Germination Rate ◽  
Thermal Time ◽  
Large Temperature ◽  
Climatic Zones ◽  
Helianthus Annuus L ◽  
Wide Range ◽  
Cardinal Temperature

SUMMARY Seed germination of six sunflower (Helianthus annuus L.) hybrids was investigated across a range of eleven constant temperatures between 5°C and 45°C. Large temperature differences in germination rate 1/t (d-1), cardinal temperature (°C) and thermal time θ (°cd) were observed among hybrids. Base temperatures (Tb) varied between 3.3°C and 6.7°C whereas maximum germination temperatures (Tm) varied between 41.7°C and 48.9°C. Final germination fraction was attained at 15°C - 25°C whereas the maximum rate of germination was attained at 30.4°C - 35.6°C. The maximum germination rate of hybrid USDA 894, the cultivar with the slowest germination rate, was only 50% of that of hybrid EX 47. The low Tb and high Tm of sunflower appear to be one of the factors which explain the successful adaptation of sunflower to a wide range of temperature. These findings are discussed in relation to the origin of the crop and its wide adaptations in diverse habitats and climatic zones.

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