Inheritance of Coleoptile Length and Culm Length in Crosses Involving Olesen's Dwarf Spring Wheat 1

Crop Science ◽  
1973 ◽  
Vol 13 (2) ◽  
pp. 181-184 ◽  
Author(s):  
J. C. Hoff ◽  
B. J. Kolp ◽  
K. E. Bohnenblust
Keyword(s):  
Spring Wheat ◽  
Coleoptile Length ◽  
Culm Length

RELATIONSHIP BETWEEN COLEOPTILE LENGTH AND CULM LENGTH IN BARLEY

1980 ◽  
Vol 60 (2) ◽  
pp. 687-693 ◽  
Author(s):  
S. CECCARELLI ◽  
M. T. PEGIATI ◽  
F. SIMEONI
Keyword(s):  
Major Gene ◽  
Genetic System ◽  
Pleiotropic Effect ◽  
Selection Experiment ◽  
New Combinations ◽  
Coleoptile Length ◽  
Culm Length ◽  
Degree Of Association ◽  
The Relationship

Coleoptile length and culm length in barley (Hordeum sativum Jess.) appeared to be strictly associated in a number of F6 lines derived from a two-way selection experiment for culm length. When the relationship between the two characters was studied in six cultivars and six F2 populations, the degree of association was variable depending upon the parental cultivars. In one F2 population, the two traits were largely independent while in the two F2 populations used in the selection experiment, coleoptile length and culm length were associated, though a small number of plants with new combinations of the two traits were recovered. The presence of a major gene with pleiotropic effect on culm and coleoptile length and closely associated to the genetic system for culm length is suggested to explain the observed results.

scholarly journals Effect of pesticide treatment of spring wheat plots on seed yields

2021 ◽  
pp. 117-125
Author(s):  
O. A. Demydov ◽  
A. A. Siroshtan ◽  
V. P. Kavunets ◽  
O. A. Zaima ◽  
S. F. Liskovskiy
Keyword(s):  
Spring Wheat ◽  
Field Experiments ◽  
Effective Means ◽  
Cost Effective ◽  
Initial Growth ◽  
Seeding Rate ◽  
Coleoptile Length ◽  
Wheat Varieties ◽  
Pesticide Treatment ◽  
Wheat Seeds

Introduction. High-quality varietal seeds, which can ensure a gain of 0.2–0.4 t/ha in the yields from their offspring, is one of the most important and cost-effective means to increase the gross grain collection of grain. Purpose. To study productive capacities of spring wheat seeds depending on treatment of fields with fungicides and insecticides. Materials and methods. The following indicators were evaluated: swelling activity, germination energy, laboratory germinability, initial growth strength, coleoptile length and the number of radicles. Seed samples that after pesticide treatment had showed the best results were tested in field experiments for productive capacities. The experimental plot area was 10 m2, in six replications. Seeds were sown with a seeder SN-10Ts after soybean with a seeding rate of 5 million germinable seeds per hectare. Spring wheat seeds produced in the experimental plots, which were treated with fungicides Akula (0.6 L/ha) and Soligor 425 EC (0.6 L/ha) and insecticides Fas (0.15 L/ha) and Karate Zeon 050 CS (0.15 L/ha) in organogenesis stages VI, VIII and X, were evaluated for productive capacities. The study was carried out on varieties MIP Zlata, Bozhena, MIP Raiduzhna and Diana. Results and discussion. Over the study years, the gain in the yields of spring wheat varieties grown from seeds of fungicide-treated plants was 0.23–0.36 t/ha; the gain in the yields of spring wheat varieties grown from seeds of insecticide-treated plants was – 0.24-0.31 t/ha. Pesticide-treated parental plants produced seeds with increased productive capacities: when such seeds were sown, the field germinability increased by 3-5%, and the plant survival – by 5-7%. Conclusions. The results indicate that the treatment of vegetating plants of spring wheat varieties in seed plots with fungicides and insecticides is a reliable way to obtain seeds with high productive capacities

Inheritance of Coleoptile Length and Its Association with Culm Length in Four Winter Wheat Crosses 1

Crop Science ◽  
1961 ◽  
Vol 1 (5) ◽  
pp. 328-332 ◽  
Author(s):  
R. E. Allan ◽  
O. A. Vogel ◽  
J. R. Burleigh ◽  
C. J. Peterson
Keyword(s):  
Winter Wheat ◽  
Coleoptile Length ◽  
Culm Length

In vitro and in vivo screening for drought tolerance in winter × spring wheat doubled haploids derived through chromosome elimination

2010 ◽  
Vol 58 (3) ◽  
pp. 301-312 ◽  
Author(s):  
S. Sharma ◽  
H. Chaudhary ◽  
G. Sethi
Keyword(s):  
Drought Tolerance ◽  
Spring Wheat ◽  
Root Number ◽  
Seedling Vigour ◽  
Coleoptile Length ◽  
Drought Susceptibility Index ◽  
Susceptibility Index ◽  
Vigour Index

The relative efficiency of in vitro and in vivo screening techniques for drought tolerance, comprising various parameters, namely germination (%), shoot length, root length, coleoptile length, root number, root/shoot ratio and seedling vigour index (SVI) under in vitro conditions and morpho-physiological and yield-contributing traits under in vivo conditions, was studied using 78 winter × spring wheat-derived doubled haploid lines of bread wheat along with 13 parental genotypes and two check varieties, HPW 155 and PBW 343. Analysis of variance for different in vitro parameters in control (0 MPa) and stress (−0.7 MPa) environments and various in vivo parameters under irrigated and rainfed environments indicated sufficient genetic variability and the differential response of the genotypes to the different stress levels for all the in vitro and in vivo parameters. Correlation studies revealed the significance of percentage germination, root number, coleoptile length and seedling vigour index under in vitro conditions and relative water content and excised leaf water loss under in vivo conditions as important selection criteria for drought tolerance, as these parameters were related with each other as well as with the drought susceptibility index (S). The significant positive rank correlation between the in vitro (−0.7 MPa) and in vivo (rainfed) stress conditions indicated that the performance of a genotype under field conditions is very similar to its performance under laboratory conditions. Hence, the selection precision for a crucial and complex trait like drought tolerance in wheat can be enhanced by exercising in vitro selection coupled with evaluation in the field. The drought susceptibility index ‘S’ should not be taken as the sole criterion to categorize genotypes as drought-tolerant or susceptible ones.

scholarly journals Phenotyping and Identification of Reduced Height (Rht) Alleles (Rht-B1b and Rht-D1b) in a Nepali Spring Wheat (Triticum aestivum L.) Diversity Panel to Enable Seedling Vigor Selection

Agronomy ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2412
Author(s):  
Kamal Khadka ◽  
Mina Kaviani ◽  
Manish N. Raizada ◽  
Alireza Navabi
Keyword(s):  
Triticum Aestivum ◽  
Drought Stress ◽  
Spring Wheat ◽  
Allelic Variation ◽  
Triticum Aestivum L ◽  
Coleoptile Length ◽  
Early Season ◽  
Positive Effects ◽  
Seedling Root ◽  
Reduced Height

Nepal is facing more intense early-season drought stress associated with climate change. The introgression of reduced height (Rht) alleles to enable stem dwarfism in bread wheat (Triticum aestivum L.) inadvertently reduced coleoptile length and growth plasticity in seedlings, making improved varieties less suitable for deep seeding; these alleles may have also reduced seedling root length. Therefore, with the long-term objective of breeding wheat for early-season drought stress, a Nepali spring wheat panel was evaluated to assess allelic variation at the most common dwarfing-associated loci (Rht-B1, Rht-D1) and their impact on coleoptile/seedling root traits, and to identify accessions with longer and/or more GA-responsive coleoptiles as parents for future breeding. Here, Kompetitive Allele Specific PCR (KASP) was used to genotype accessions. The panel was phenotyped using the cigar-roll method in the presence/absence of GA3. Plant height was measured under field conditions. The results showed that Nepali landraces had a significantly higher frequency of the non-dwarfing allele Rht-B1a. The dwarfing alleles Rht-B1b and Rht-D1b had negative effects on coleoptile length but positive effects on the length of the longest seedling root. However, 40 potential semi-dwarf accessions (possessing Rht-B1b and/or Rht-D1b alleles) with long and/or more plastic coleoptiles suited for deep sowing were identified. This included 12 accessions that exhibited significant changes in coleoptile length in response to GA3 treatment.

Effectiveness of complex inoculation of spring wheat with N[2] -fi xing bacteria Azospirillum brasilense and mold-antagonist Chaetomium cochliodes

2014 ◽  
Vol 1 (3) ◽  
pp. 57-61
Author(s):  
E. Kopylov
Keyword(s):  
Spring Wheat ◽  
Root Zone ◽  
Wheat Root ◽  
Root Surface ◽  
Atmospheric Nitrogen ◽  
Rhizospheric Soil ◽  
Chain Reaction ◽  
Wheat Roots ◽  
Chlorophyll A And B ◽  
Polymerase Chain

Aim. To study the specifi cities of complex inoculation of spring wheat roots with the bacteria of Azospirillum genus and Chaetomium cochliodes Palliser 3250, and the isolation of bacteria of Azospirillum genus, capable of fi xing atmospheric nitrogen, from the rhizospheric soil, washed-off roots and histoshere. Materials and meth- ods. The phenotypic features of the selected bacteria were identifi ed according to Bergi key. The molecular the polymerase chain reaction and genetic analysis was used for the identifi cation the bacteria. Results. It has been demonstrated that during the introduction into the root system of spring wheat the strain of A. brasilensе 102 actively colonizes rhizospheric soil, root surface and is capable of penetrating into the inner plant tissues. Conclusions. The soil ascomucete of C. cochliodes 3250 promotes better settling down of Azospirillum cells in spring wheat root zone, especially in plant histosphere which induces the increase in the content of chlorophyll a and b in the leaves and yield of the crop.

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