scholarly journals The effect of male sterility on oil content and seed yield in sunflowers (Helianthus annuus L.)

Agronomie ◽  
1984 ◽  
Vol 4 (9) ◽  
pp. 901-904 ◽  
Author(s):  
Felicity VEAR
Keyword(s):  
Male Sterility ◽  
Helianthus Annuus ◽  
Seed Yield ◽  
Oil Content ◽  
Helianthus Annuus L

scholarly journals Combining ability for seed yield, its components and oil content in sunflower (Helianthus annuus L.)

2017 ◽  
Vol 8 (1) ◽  
pp. 96
Author(s):  
A.U. Ingle ◽  
S.S. Nichal ◽  
V.L. Gawande ◽  
E.R. Vaidya ◽  
B.S. Kharat
Keyword(s):  
Helianthus Annuus ◽  
Seed Yield ◽  
Combining Ability ◽  
Oil Content ◽  
Helianthus Annuus L

WILD OAT INTERFERENCE IN SUNFLOWER

1985 ◽  
Vol 65 (1) ◽  
pp. 219-222 ◽  
Author(s):  
W. O. CHUBB ◽  
G. H. FRIESEN
Keyword(s):  
Helianthus Annuus ◽  
Seed Yield ◽  
Critical Period ◽  
Oil Content ◽  
Field Experiments ◽  
Avena Fatua ◽  
Wild Oat ◽  
Helianthus Annuus L ◽  
Wild Oats ◽  
Postemergence Herbicides

In field experiments, sunflower (Helianthus annuus L. ’Hybrid 894’) recovered from initial effects of wild oat (Avena fatua L.) interference and yielded normally if the weed was removed within 4 wk after crop emergence and the crop was kept relatively free of wild oats thereafter until harvest. In widely spaced plantings, wild oats growing between-the-rows competed just as vigorously as in-the-row infestations. Selective postemergence herbicides did not always provide sufficient control of wild oats to prevent significant losses in sunflower yield.Key words: Competition, interference, seed yield, oil content, herbicides, critical period

HETEROSIS, COMBINING ABILITY, AND PREDICTED SYNTHETICS FROM A DIALLEL CROSS IN SUNFLOWERS (HELIANTHUS ANNUUS L.)

1966 ◽  
Vol 46 (1) ◽  
pp. 59-67 ◽  
Author(s):  
Eric D. Putt
Keyword(s):  
Helianthus Annuus ◽  
Combining Ability ◽  
Oil Content ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Helianthus Annuus L ◽  
The Mean ◽  
Seed Characters ◽  
Mature Weight

Heterosis occurred for the eight plant and seed characters studied. It was most frequent for yield of seed and height of plant. Mean squares for general combining ability (gca) and specific combining ability (sca) were significant (P =.01) for all characters. The estimated components for gca were greater than for sca for days to mature, weight per bushel, and percent oil in the seed; less for height and yield of seed; and essentially the same for days to bloom, diameter of head, and weight per 1000 seeds.The yield of seed and percent oil in the seed, for the highest ranking 100 synthetics that could be composed from the 10 lines, was predicted in F6 assuming 50 and 60% outcrossing between F2 and F6. Virtually all values exceeded the mean performance of four check samples of commercial hybrids. Many exceeded the highest rank check for oil content in the seed. Fourteen of the highest ranking 100 synthetics for yield and 30 for oil content consisted of two or three lines. It was concluded that synthetics can be superior to the present hybrids in heterosis and that desirable synthetics can be made from only a few lines.

Dwarf sunflower response to row spacing, stand reduction, and defoliation at different growth stages

2003 ◽  
Vol 83 (2) ◽  
pp. 319-326 ◽  
Author(s):  
B. L. Johnson
Keyword(s):  
Helianthus Annuus ◽  
Oil Content ◽  
Growth Stage ◽  
Total Yield ◽  
Reciprocal Relationship ◽  
Yield Response ◽  
Yield Reduction ◽  
Row Spacing ◽  
Growth Stages ◽  
Helianthus Annuus L

Growth compensation of dwarf sunflower (Helianthus annuus L.) hybrids to low initial stands, later stand losses, or plant defoliation has not been reported regarding replanting decisions and crop insurance yield loss assessment. Three experiments were conducted to study the affect of stand reduction, defoliation, and row spacing on dwarf sunflower yield and quality when grown in eastern North Dakota. Experiment 1 evaluated stand reduction (0, 25, 50 and 75%) applied at growth stages (V4, R1 and R6) in 15, 45 and 76 cm spaced rows. Row spacing interactions with stand reduction and growth stage were not significant for yield indicating growth stage and stand reduction effects on yield response were independent of row spacing. In exp. 2, significant growth stage (V4, V8, R1, R2, R3, R5 and R6) by stand reduction (0, 12, 25, 37, 50, 62 and 75%) interaction showed stand reduction at vegetative growth stages not influencing yield, but as maturity progressed yield reductions became greater with increased stand reduction. Achene weight increased with increasing stand reduction at vegetative and early reproductive stages. A reciprocal relationship was noted between achene weight and achene oil content where oil content decreased as achene weight increased. Interaction of growth stage (R1 and R6) and defoliation (0, 25, 50, 75 and 100%) in exp. 3 indicated greater reduction in yield, test weight, 1000-achene weight, and achene oil conte nt as defoliatin increased at growth stage R6. Yield compensating ability of dwarf sunflower is dependent on type and level of damage and growth stage of occurrence, with total yield reduction considering all effects. Key words: Sunflower, Helianthus annuus L., row spacing, stand reduction, defoliation

scholarly journals GENETIC DIVERSITY IN NON-OILSEED SUNFLOWER (Helianthus annuus L.) GENOTYPES / DIVERSIDAD GENETICA DE GENOTIPOS NO OLEAGINOSOS DEL GIRASOL (Helianthus annuus L.) / DIVERSITÉ GÉNÉTIQUE DANS LES GÉNOTYPES DE TOURNESOL NON-OLÉAGINEUX (Helianthus annuus L.)

Helia ◽  
2001 ◽  
Vol 24 (34) ◽  
pp. 17-24
Author(s):  
K. Manjula ◽  
H.L. Nadaf ◽  
K. Giriraj
Keyword(s):  
Genetic Diversity ◽  
Protein Content ◽  
Helianthus Annuus ◽  
Plant Height ◽  
Genetic Divergence ◽  
Oil Content ◽  
Diversité Génétique ◽  
Helianthus Annuus L ◽  
Volume Weight ◽  
Seed Characteristics

SUMMARYGenetic diversity was assessed in 46 non-oilseed sunflower genotypes for 14 characters by adopting D2 analysis. Oil content and plant height exhibited maximum contributions towards genetic divergence. The genotypes were grouped into 11 clusters. The inter-cluster D2 values ranged from 288.17 to 3972.34. The contribution of oil content towards genetic divergence in the 46 genotypes was confirmed when D2 analysis was performed for seed characteristics such as test weight, volume weight, hull content, kernel recovery, oil and protein content.

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