Evaluation of field resistance toStriga hermonthica(Del.) Benth. inSorghum bicolor(L.) Moench. The relationship with strigolactones

2016 ◽  
Vol 72 (11) ◽  
pp. 2082-2090 ◽  
Author(s):  
Nasreldin Mohemed ◽  
Tatsiana Charnikhova ◽  
Evert J Bakker ◽  
Aad van Ast ◽  
Abdelgabar GT Babiker ◽  
...  
Keyword(s):  
Field Resistance ◽  
The Relationship

The relationship between seedling and field resistance to two races of stem rust in Thatcher wheat

2001 ◽  
Vol 81 (3) ◽  
pp. 415-418 ◽  
Author(s):  
D. R. Knott
Keyword(s):  
Key Words ◽  
Stem Rust ◽  
Field Resistance ◽  
Limited Effect ◽  
Seedling Resistance ◽  
The Cross ◽  
The Relationship ◽  
Adult Plants

A set of 169 single descent lines from the cross Thatcher/LMPG-6 was used to study the inheritance of seedling resistance to six races of stem rust in Thatcher. The same lines were tested with two of the races in separate field nurseries. The results showed that at least some of the genes for seedling resistance had a significant, but limited, effect on field resistance. Additional genes conferred resistance only in adult plants in the field. Key words: Field resistance, stem rust, Thatcher wheat

Associations between earliness, Ascochyta response, and grain yield in chickpea

2006 ◽  
Vol 57 (4) ◽  
pp. 465 ◽  
Author(s):  
D. J. Bonfil ◽  
Judith Lichtenzveig ◽  
I. Shai ◽  
A. Lerner ◽  
Sharon Tam ◽  
...  
Keyword(s):  
Grain Yield ◽  
Cicer Arietinum ◽  
Ascochyta Blight ◽  
Temperature Response ◽  
Field Resistance ◽  
Late Flowering ◽  
Cicer Arietinum L ◽  
Moderate Field ◽  
The Relationship ◽  
Advanced Generation

Evidence from an array of dryland systems suggests that chickpea (Cicer arietinum L.) grain yield could be improved through better phenological adaptation. However, information on the relationship between phenology and Ascochyta response genes, and their possible interaction with biomass and grain yield, is missing. Accordingly, the aim of the present study was to determine the associations between the above factors and biomass and grain yield in chickpea. To that end, standard Israeli cultivars and advanced generation bulked progeny from the cv. Hadas × ICC5810 cross were used. Hadas is a late-flowering, high-yielding Israeli kabuli (0.45 g/seed) cultivar with moderate field resistance to Ascochyta blight, whereas ICC5810 is a day-neutral desi (0.15 g/seed) genotype with a strong temperature response, from India. Higher yields were observed among the late-flowering bulks of the Hadas × ICC5810 progeny. No relationship between the Ascochyta response and biomass and grain yield was observed. No interaction between the phenology and Ascochyta response grouping on biomass and grain yield was observed. The results demonstrate the feasibility of combining Ascochyta resistance with earlier flowering and its potential to improve chickpea adaptation to dryland systems.

THE RELATIONSHIP BETWEEN MORPHOLOGIC CHARACTERS AND RUST RESISTANCE IN A CROSS BETWEEN EMMER, (TRITICUM DICOCCUM) AND COMMON WHEAT, (TRITICUM VULGARE)

1930 ◽  
Vol 2 (5) ◽  
pp. 295-311 ◽  
Author(s):  
J. B. Harrington
Keyword(s):  
Rust Resistance ◽  
Correlation Coefficients ◽  
Great Difficulty ◽  
Field Resistance ◽  
Puccinia Graminis ◽  
Strong Correlations ◽  
Random Group ◽  
Triticum Vulgare ◽  
Triticum Dicoccum ◽  
The Relationship

A study of morphologic character in relation to field resistance to black stem rust of wheat (Puccinia graminis tritici, Erikss. & Henn) was made on the cross Vernal (Triticum dicoccum, Schubl.) × Marquis (T. vulgare, Host.). Fifteen morphologic characters were used including spike form, spike compactness, stem hollowness, rachis articulation, rachis width, spikelet adherence, glume adherence, keel sharpness and seed character, all of which are of species differentiating importance. A random group of 276 F2 plants showed no strong or moderately strong correlations between rust reaction and other characters: the most significant correlation coefficients ranged from.13 to.27. Between any two morphologic characters no strong relationships were found, the highest correlation coefficient obtained being.37. In the entire F2 population of 21,480 plants there were 232 vulgare-like hybrids showing the high rust resistance of Vernal, although Marquis had a fairly uniform infection of moderate severity. All of these hybrids proved, upon laboratory examination, to be of vulgare or near-vulgare type in nearly all characters especially the economically important characters spike form, rachis articulation, spikelet adherence and glume adherence. This study, therefore, demonstrates that high rust resistance can be transferred from dicoccum to a vulgare-type wheat without great difficulty. It is concluded that the attainment of desirable combinations of emmer rust resistance with important morphologic characters of vulgare depends primarily upon having a population of many thousands of individuals from which to select.

scholarly journals Frost Tolerance of Eight Olive Cultivars

HortScience ◽  
2005 ◽  
Vol 40 (3) ◽  
pp. 558-560 ◽  
Author(s):  
Diego Barranco ◽  
Natividad Ruiz ◽  
María Gómez-del Campo
Keyword(s):  
Leaf Tissue ◽  
Freezing Temperature ◽  
Frost Damage ◽  
Frost Tolerance ◽  
Field Resistance ◽  
Ion Leakage ◽  
Susceptible Cultivar ◽  
Olive Cultivars ◽  
The Relationship ◽  
Resistance Data

This study aims to determine the relationship between laboratory frost-resistance data for the leaves of eight olive cultivars and observed field resistance in the same genotypes undergoing natural frost damage. The lethal freezing temperature (LT50) for each cultivar was established by measuring the electrical conductivity (EC) of the medium into which solutes from damaged leaf tissue were leaked. The value obtained was then correlated with percentage frost shoot for the same eight cultivars damaged by natural frosts in a field test. A negative correlation was observed between the percentage frost shoot and leaf LT50 for all the cultivars under study. The most frost-hardy cultivars (`Cornicabra', `Arbequina', and `Picual') were those presenting the lowest percentage frost shoot and lowest LT50. Conversely, the most frost-susceptible cultivar (`Empeltre') displayed 100% frost shoot, together with one of the highest LT50 values (–9.5 °C). According to these results, lethal freezing temperature (LT50) calculated from leaf ion leakage at a range of freezing temperatures, seem to be a valid parameter for evaluating frost tolerance in olive cultivars.

Interstellar gas in the central region of the Galaxy

1967 ◽  
Vol 31 ◽  
pp. 239-251 ◽  
Author(s):  
F. J. Kerr
Keyword(s):  
Central Region ◽  
Galactic Plane ◽  
Neutral Hydrogen ◽  
Continuum Emission ◽  
Galactic Centre ◽  
Interstellar Gas ◽  
Hydrogen Recombination ◽  
The Galaxy ◽  
Centre Region ◽  
The Relationship

A review is given of information on the galactic-centre region obtained from recent observations of the 21-cm line from neutral hydrogen, the 18-cm group of OH lines, a hydrogen recombination line at 6 cm wavelength, and the continuum emission from ionized hydrogen.Both inward and outward motions are important in this region, in addition to rotation. Several types of observation indicate the presence of material in features inclined to the galactic plane. The relationship between the H and OH concentrations is not yet clear, but a rough picture of the central region can be proposed.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Choosing a Markov blanket

2020 ◽  
Vol 43 ◽  
Author(s):  
Thomas Parr
Keyword(s):  
Markov Blanket ◽  
Target Article ◽  
The Relationship

Abstract This commentary focuses upon the relationship between two themes in the target article: the ways in which a Markov blanket may be defined and the role of precision and salience in mediating the interactions between what is internal and external to a system. These each rest upon the different perspectives we might take while “choosing” a Markov blanket.

Tinkering with cognitive gadgets: Cultural evolutionary psychology meets active inference

2019 ◽  
Vol 42 ◽  
Author(s):  
Paul Benjamin Badcock ◽  
Axel Constant ◽  
Maxwell James Désormeau Ramstead
Keyword(s):  
Evolutionary Psychology ◽  
Research Program ◽  
Active Inference ◽  
Innovative Research ◽  
Cognitive Faculties ◽  
Cultural Evolutionary ◽  
The Relationship

Abstract Cognitive Gadgets offers a new, convincing perspective on the origins of our distinctive cognitive faculties, coupled with a clear, innovative research program. Although we broadly endorse Heyes’ ideas, we raise some concerns about her characterisation of evolutionary psychology and the relationship between biology and culture, before discussing the potential fruits of examining cognitive gadgets through the lens of active inference.

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