RECURRENT SELECTION FOR SEED YIELD IMPROVEMENT IN LOTUS CORNICULATUS, CULT LEO

1973 ◽  
Vol 53 (4) ◽  
pp. 811-815 ◽  
Author(s):  
G. S. SANDHA ◽  
B. E. TWAMLEY
Keyword(s):  
Seed Yield ◽  
Recurrent Selection ◽  
No Reduction ◽  
Lotus Corniculatus ◽  
Birdsfoot Trefoil ◽  
Phenotypic Method ◽  
Coefficient Of Variability ◽  
Selection For ◽  
Phenotypic Methods ◽  
Seed Yields

Birdsfoot trefoil (Lotus corniculatus L.), cult Leo, was used as a base population for a recurrent selection program for seed yield. Objectives were: (1) improvement of seed yield, and (2) comparison of a genotypic and a geno-phenotypic method of selection. Two cycles were completed and evaluated. Seed yields for the genotypic and geno-phenotypic methods were 132 and 158%, respectively, of Leo after two cycles of selection. The geno-phenotypic method proved superior to the genotypic after each cycle. The broad sense heritability (61% for cycles 1 and 2), genotypic standard deviation, and genotypic coefficient of variability estimates (16.9 and 15.0% for cycles 1 and 2) indicated no reduction in genotypic variability with the geno-phenotypic method. However, the variability was practically exhausted with the genotypic method after cycle 2. Thus, further improvement with additional cycles of selection should be possible with the geno-phenotypic method but not with the genotypic method.

OAC Bright birdsfoot trefoil

1997 ◽  
Vol 77 (2) ◽  
pp. 251-253 ◽  
Author(s):  
B. E. Twamley ◽  
D. T. Tomes ◽  
S. R. Bowley
Keyword(s):  
Key Words ◽  
Seed Yield ◽  
Recurrent Selection ◽  
Lotus Corniculatus ◽  
Birdsfoot Trefoil ◽  
Science Department ◽  
Seedling Vigour ◽  
Herbage Yield ◽  
Cultivar Description ◽  
Selection For

OAC Bright is a birdsfoot trefoil (Lotus corniculatus L.) cultivar developed by the Crop Science Department, University of Guelph. It was developed by within and among half-sib progeny recurrent selection for seedling vigour and seed yield. OAC Bright has 2% higher seedling vigour and 0.8% higher herbage yield than Leo. It has similar maturity and persistence to Leo. Key words: Birdsfoot trefoil, cultivar description, seedling vigour, seed yield, recurrent selection

GENOTYPIC, PHENOTYPIC, AND GENO-PHENOTYPIC METHODS OF SELECTION FOR SEEDLING VIGOR IN BIRDSFOOT TREFOIL

1972 ◽  
Vol 52 (2) ◽  
pp. 227-232 ◽  
Author(s):  
B. E. TWAMLEY
Keyword(s):  
Combining Ability ◽  
Birdsfoot Trefoil ◽  
Seedling Vigor ◽  
The Third ◽  
Method Selection ◽  
Phenotypic Group ◽  
Phenotypic Method ◽  
Genotypic Group ◽  
Selection For ◽  
Phenotypic Methods

A 72-line, six-replicate seedling vigor test was used to initiate three methods of selection for seedling vigor. In the genotypic method, selection was based on progeny test. In the phenotypic, it was based purely on the vigor of the seedling. In the third or geno-phenotypic method vigorous seedlings were selected from the most vigorous lines. The selected plants were polycrossed within groups and the seed so produced was used to establish new nurseries. From these, seed was collected and comparative seedling vigor tests were undertaken. Heritability tests were also run. The geno-phenotypic group outyielded the genotypic group by an average of 11%. The phenotypic group behaved erratically. Heritability for seedling vigor was low, and for combining ability for seedling vigor, considerably higher. The best method of selecting good germplasm for seedling vigor was to select the most vigorous seedlings from the most vigorous progeny lines.

Bruce birdsfoot trefoil

2008 ◽  
Vol 88 (6) ◽  
pp. 1093-1094
Author(s):  
Y. A. Papadopoulos ◽  
K. B. McRae ◽  
D. Gehl ◽  
S. A. E. Fillmore
Keyword(s):  
Nova Scotia ◽  
Root Growth ◽  
Key Words ◽  
Lotus Corniculatus ◽  
Birdsfoot Trefoil ◽  
Mass Selection ◽  
Plant Vigour ◽  
Growth Vigour ◽  
Cultivar Description ◽  
Selection For

Bruce birdsfoot trefoil (Lotus corniculatus L.) is a 71-clone synthetic variety developed at the Nappan Research Farm, Agriculture and Agri-Food Canada, Nappan, Nova Scotia. Bruce was developed through two cycles of mass selection for plant vigour (top and root growth) and winterhardiness, and one cycle of mass selection for re-growth vigour under grazing. In Atlantic Canada, Bruce produced more forage than the check cultivar Leo during 3 post-seeding years. It was also superior in spring growth with high first-cut herbage yields. Key words: Birdsfoot trefoil, Lotus corniculatus, cultivar description

Recovery of field-grown canola from sulfur deficiency

1996 ◽  
Vol 36 (1) ◽  
pp. 79 ◽  
Author(s):  
PJ Hocking ◽  
A Pinkerton ◽  
A Good
Keyword(s):  
Seed Yield ◽  
Seed Oil ◽  
No Reduction ◽  
Stem Elongation ◽  
Potassium Sulfate ◽  
Growth Stages ◽  
Flower Buds ◽  
S Deficiency ◽  
Oil Concentration ◽  
Seed Yields

Sulfate-sulfur was applied to sulfur (S)-deficient canola at several growth stages in a field experiment at Cargo near Orange, New South Wales. Applications of 0, 10 or 40 kg S/ha (S0, S10 and S40) as mixtures of potassium sulfate and potassium chloride were made at sowing, the 5-6 leaf rosette stage, flower buds visible, stem elongation and first flowering. The plots received either 80 or 160 kg nitrogen (N)/ha at sowing. Plants from the S0 plots showed symptoms of severe S deficiency during rapid stem elongation, and had a 52% reduction in seed yield and a 21% reduction in seed oil concentration compared with the S40 plants. Application of S10 at sowing, or topdressing S-deficient plants with this rate of S, was inadequate because, although seed oil concentrations were normal (39-42%), seed yields were 25% lower than those from plots that received S40. Topdressing S-deficient plants with S40 at either the 5-6 leaf rosette stage, flower buds visible or stem elongation resulted in the same seed yields and seed oil concentrations as obtained when S40 was applied at sowing. However, there was a 15% reduction in seed yield but no reduction in seed oil concentration when the S40 topdressing was delayed until flowering. Although S10 was inadequate to correct the S deficiency, there was no reduction in either seed yield or seed oil concentration when S10 was topdressed as late as flowering, when compared with this rate of S applied at sowing. Seed meal protein levels were increased by the S40 topdressings. Concentrations of S in seed from the S0 and S10 plants were below the critical value of 0.36% for canola. Seed N:S concentration ratios of S-deficient plants were greater than 10, but 7.5 for plants which received adequate S. Total glucosinolates in seed were increased by the application of S, but the levels were still well below the limit set for the canola standard.

Alternative strategies of recurrent selection for seed yield of soybean

Euphytica ◽  
1989 ◽  
Vol 40 (1-2) ◽  
pp. 111-120 ◽  
Author(s):  
Elcio P. Guimaraes ◽  
Walter R. Fehr
Keyword(s):  
Seed Yield ◽  
Recurrent Selection ◽  
Alternative Strategies ◽  
Selection For

scholarly journals Yield evaluation of varieties from the world collection of birdsfoot trefoil (Lotus corniculatus L.)

2011 ◽  
Vol 48 (No. 6) ◽  
pp. 265-270
Author(s):  
J. Pelikán
Keyword(s):  
Seed Yield ◽  
Lotus Corniculatus ◽  
Field Trials ◽  
Birdsfoot Trefoil ◽  
Local Varieties ◽  
World Collection ◽  
The World ◽  
Herbage Yield ◽  
Second Year ◽  
Good Productivity

In field trials in 1998–2000, ten varieties of the world collection of birdsfoot trefoil (Lotus corniculatus) were evaluated for herbage and hay yields. In all the years of testing yields from three cuttings and total annual production were evaluated. In 1999, seed yield was also recorded. As a control, alfalfa (Medicago sativa) variety was included in the experiment. The test varieties showed good productivity in the first and especially in the second year of testing, most of them exceeded alfalfa in herbage yield in individual cuttings and in total productions. As for hay yield, the differences were not so great. Local varieties showed very good productivity, predominantly in herbage yields. Of foreign varieties, the best herbage, hay and seed yielder was the Hungarian variety Puszta. There were no statistical differences in seed yield between the varieties. The yields were, however, relatively low.

Evaluation of Self and Polycross Progeny Testing in Birdsfoot Trefoil (Lotus corniculatus L.) for Forage and Seed Yield

1987 ◽  
Vol 98 (2) ◽  
pp. 141-148 ◽  
Author(s):  
O. U. Onokpise ◽  
S. R. Boinley ◽  
D. T. Tomes ◽  
B. E. Twamley
Keyword(s):  
Seed Yield ◽  
Lotus Corniculatus ◽  
Birdsfoot Trefoil ◽  
Progeny Testing
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