Multi environmental evaluation of persistence and drought tolerance in smooth bromegrass (Bromus inermis): genetic analysis for stability in combining ability

2021 ◽  
Author(s):  
F. Saeidnia ◽  
M. M. Majidi ◽  
M. R. Dehghani ◽  
A. Mirlohi ◽  
B. Araghi
Keyword(s):  
Drought Tolerance ◽  
Genetic Analysis ◽  
Combining Ability ◽  
Bromus Inermis ◽  
Smooth Bromegrass ◽  
Environmental Evaluation

GENOTYPE × ENVIRONMENT INTERACTIONS IN SMOOTH BROMEGRASS. I. YIELD

1979 ◽  
Vol 21 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Wai-Koon Tan ◽  
Geok-Yong Tan ◽  
P. D. Walton
Keyword(s):  
Genetic Variation ◽  
Analysis Of Variance ◽  
Combining Ability ◽  
Significant Variation ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Bromus Inermis ◽  
Smooth Bromegrass ◽  
Combining Ability Analysis ◽  
Half Diallel

Twenty-one progenies and the parents of a 7 × 7 half diallel cross of smooth bromegrass (Bromus inermis Leyss.) were evaluated at four locations in Alberta in each of two years, for genetic variation and genetic by environment interactions in the expression of their yield potentials. Years, locations and their interactions were highly significant in the combined analysis of variance. Combining ability analysis revealed that general combining ability (GCA) and specific combining ability (SCA) were both important in the expression of yield, including spring, fall and annual yield, whereas GCA was more important than SCA for yield per area. Although the genotype × environment interactions were all highly significant, variation accounted for by combining ability effects was generally higher than the interaction effects of GCA and SCA respectively, with environments. High average GCA effects for spring, fall and annual yield were demonstrated for the clones UA5, UA9 and B42. These together with the high average SCA effects suggested that the three clones could be included in a synthetic to develop high yielding cultivars. The results suggested that recurrent selections involving multi-location and multi-year testing seems necessary in breeding for high yielding bromegrass cultivars in Alberta.

Inheritance and combining ability of persistence and drought recovery in smooth bromegrass (Bromus inermis L.)

Euphytica ◽  
2019 ◽  
Vol 215 (10) ◽  
Author(s):  
Fatemeh Saeidnia ◽  
Mohammad Mahdi Majidi ◽  
Aghafakhr Mirlohi ◽  
Sajed Bahrami
Keyword(s):  
Combining Ability ◽  
Bromus Inermis ◽  
Smooth Bromegrass ◽  
Drought Recovery

Genetic analysis of seed-related traits in smooth bromegrass (Bromus inermis) under well-watered and water-stressed conditions

2016 ◽  
Vol 72 (1) ◽  
pp. 163-173 ◽  
Author(s):  
M. M. Majidi ◽  
S. Bahrami ◽  
M. Abtahi ◽  
A. Mirlohi ◽  
B. Araghi
Keyword(s):  
Genetic Analysis ◽  
Bromus Inermis ◽  
Smooth Bromegrass

Breeding for Seed Yield and Seed Quality in Smooth Bromegrass, Bromus inermis Leyss . 1

Crop Science ◽  
1970 ◽  
Vol 10 (5) ◽  
pp. 539-542 ◽  
Author(s):  
R. P. Knowles ◽  
D. A. Cooke ◽  
E. Buglass
Keyword(s):  
Seed Yield ◽  
Seed Quality ◽  
Bromus Inermis ◽  
Smooth Bromegrass

SEEDLING PUBESCENCE AS A GENETIC MARKER IN SMOOTH BROMEGRASS (BROMUS INERMIS LEYSS.)

1980 ◽  
Vol 60 (4) ◽  
pp. 1163-1170 ◽  
Author(s):  
R. P. KNOWLES
Keyword(s):  
Genetic Marker ◽  
North American ◽  
Inbred Lines ◽  
Bromus Inermis ◽  
Mass Selection ◽  
Smooth Bromegrass ◽  
Leaf Stage ◽  
Temperature Conditions ◽  
Early Fall ◽  
Controlled Crosses

Seedlings of a group of North American cultivars of smooth bromegrass were examined at the three-leaf stage for pubescence under greenhouse conditions. Southern strains showed 90–98% strongly pubescent seedlings while northern strains had 60–70% strongly pubescent seedlings. Saratoga, although considered southern in type, was less pubescent than all other cultivars except Polar. The degree of pubescence was greater in spring and early fall plantings than in winter plantings, indicating that pubescence depends on good light and temperature conditions. Strains nearly pure for strong pubescence were formed by repeated cycles of mass selection. Few inbred lines showed uniformity for pubescent or smooth seedlings. Pure-breeding smooth stocks were more difficult to produce than highly pubescent strains. Controlled crosses showed partial dominace for pubescence and little difference between reciprocals. Adjacent plantings of pubescent and smooth seedling stocks showed as much as 45% off-type seedlings from seed produced at the interface of plots. Contamination declined to 10% or less at 10 m from the border.

NITROGENASE ACTIVITY OF ALFALFA GROWN ALONE AND IN MIXTURE WITH GRASS UNDER GREENHOUSE CONDITIONS

1985 ◽  
Vol 65 (3) ◽  
pp. 787-791
Author(s):  
H. A. BURITY ◽  
B. E. COULMAN ◽  
M. A. FARIS
Keyword(s):  
Medicago Sativa ◽  
Nitrogenase Activity ◽  
Dactylis Glomerata ◽  
Phleum Pratense ◽  
Bromus Inermis ◽  
Smooth Bromegrass ◽  
Medicago Sativa L ◽  
Dactylis Glomerata L ◽  
Phleum Pratense L ◽  
Nodule Tissue

A greenhouse experiment has shown that total nitrogenase activity of alfalfa (Medicago sativa L.) is not significantly affected when grown in association with timothy (Phleum pratense L.), smooth bromegrass (Bromus inermis Leyss) or orchardgrass (Dactylis glomerata L.) except after initial harvest when decreased alfalfa activity was associated with smooth bromegrass or orchardgrass. It was concluded that mixed cultures of alfalfa with timothy, smooth bromegrass or orchardgrass have no effect on alfalfa N2 fixation. The results also suggest the occurrence of N transference from alfalfa to associated grasses. It is speculated that this transfer is not primarily due to the death of roots and nodule tissue (after harvest), but involves some degree of N excretion during the period before initial harvest.Key words: Alfalfa-grass mixtures, N2-fixation, nodule activity, N-transference

EARLY SEEDLING VIGOUR AND SEED WEIGHT IN RELATION TO BREEDING IN SMOOTH BROMEGRASS, BROMUS INERMIS LEYSS.

1960 ◽  
Vol 40 (2) ◽  
pp. 268-280 ◽  
Author(s):  
W. E. Tossell
Keyword(s):  
Seed Weight ◽  
Field Trials ◽  
Bromus Inermis ◽  
Rapid Progress ◽  
Initial Screening ◽  
Agronomic Characters ◽  
Smooth Bromegrass ◽  
Seedling Vigour ◽  
Close Relationship ◽  
Early Seedling

Variability in early seedling vigour was studied in polycross progenies from highly selected plants rated as good in other agronomic characters and in open-pollinated progenies from previously unselected So plants. Differences were found in both groups in rate and per cent emergence, and in height and vigour at 28 days. Considering the variability observed in these characters and the favourable associations found, it appears that early seedling vigour in bromegrass can be improved by selection within the species.Seed weight was closely associated with early seedling vigour. Plants differed widely in seed weight, and in breeding for early seedling vigour it appears that most rapid progress can be made by screening breeding material for seed weight. Because seed weight did not account for all of the differences among progenies in seedling vigour, progenies from high seed weight plants or families should be subjected to a seedling vigour test to further select for this character. The close relationship found between greenhouse and field trials indicates that at least the initial screening can be done in the greenhouse.

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