INFLUENCE DES CULTIVARS ET DES STADES DE PRÉLÈVEMENT DE LA PREMIÈRE POUSSE SUR LA PRODUCTION DE SEMENCE DE TRÈFLE ROUGE

1990 ◽  
Vol 70 (4) ◽  
pp. 1071-1080 ◽  
Author(s):  
LUCIUS BELZILE
Keyword(s):  
Seed Germination ◽  
Seed Production ◽  
Seed Yield ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Kernel Weight ◽  
Climatic Conditions ◽  
Cultivar Group ◽  
Stage Of Development ◽  
Clover Seed

For five years, the effect of cultivars and vegetative stage of cutting were measured on red clover (Trifolium pratense L.) seed production. The first group of cultivars included Hungaropoli, Ottawa and Lakeland harvested in 1981 and 1982. The second group included Arlington, Florex and Prosper I harvested in 1984, 1985 and 1987. The total annual seed yield differed within cultivars and the highest seed yield was obtained with Hungaropoly and Florex. In the first cultivar group, the tetraploid Hungaropoly obtained a kernel weight higher than the diploids Lakeland and Ottawa. In the second group of cultivars, all diploids, Arlington yielded the highest kernel weight. The percentage of seed germination of Hungaropoly was higher than Lakeland and Ottawa while for Florex it was slightly higher than Arlington and Prosper I. A prior vegetative cutting is essential for good seed yield. In the absence of vegetative cutting seed weight seemed improved. The stage of development at which vegetative cutting is done has little influence on percentage seed germination. These results have shown that despite the strong effect of climatic conditions on seed production, the choice of the optimum stage for vegetative cutting and a well adapted cultivar are important aspects in successful seed production.Key words: Red clover, seed production, cultivar, stage of cutting

scholarly journals Comparative study of seed yield and seed quality of advanced lines and commercial varieties of red clover (Trifolium pratense L.)

2017 ◽  
Author(s):  
Borislav Petkovic ◽  
Novo Przulj ◽  
Vojo Radic ◽  
Milan Mirosavljevic
Keyword(s):  
Grain Yield ◽  
Seed Production ◽  
Seed Yield ◽  
Trifolium Pratense ◽  
Seed Quality ◽  
Red Clover ◽  
Kernel Weight ◽  
Thousand Kernel Weight ◽  
Trifolium Pratense L ◽  
Clover Seed

Red clover (Trifolium pratense L.) is one of the most important forage legumes in areas with acidic and nutrient poorer soils where alfalfa fails to growth. In 2010-2011 years period we studied four advanced lines and four commercial varieties of red clover, which are widely used in the production in Bosnia and Herzegovina. Our results showed that the variation in grain yield, thousand kernel weight and germination energy was under control of growth. Across genotypes seed yield in 2010 and 2011 was 205 and 223 kg ha-1, respectively. The highest yield of seed was obtained from second growth in the second year. Extreme precipitation during anthesis and grain filling and ripening in 2010 negatively affected red clover seed production. Advanced line DS-2 had the highest grain yield (234 kg ha-1) and thousand kernel weight (1.75 g). Low seeds yields of the tested genotypes are questioning the cost-effectiveness of red clover seed production at this site.

Effet des types de sol sur la production de semence du trèfle rouge

1991 ◽  
Vol 71 (4) ◽  
pp. 1039-1046 ◽  
Author(s):  
Lucius Belzile
Keyword(s):  
Seed Production ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Climatic Conditions ◽  
Thousand Grain Weight ◽  
Light Soil ◽  
Different Types ◽  
Percent Germination ◽  
Trifolium Pratense L ◽  
Clover Seed

Red clover (Trifolium pratense L.) was grown for seed production after the seeding year on two different types of soils, in the same climatic area. An important difference in yield which was often related to cultivar and sometimes to year was observed between the two soils — the light soil, Saint-André gravelly loam, produced more seed than the heavy Kamouraska clay. Seed yield differed between cultivars with Florex and Arlington producing the most. On an annual basis, the thousand-grain weight was higher on Kamouraska than on Saint-André. The percent germination was not influenced by soil type and cultivar but variation between years was observed. The production of heads per plant was higher on Saint-André. The number of seeds produced per plant and per head was, as for yield, higher on Saint-André than Kamouraska. The influence of cultivars and years was not always visible on these last parameters. Therefore these results demonstrate that generally the success of red clover seed production depends not only on cultivar and climatic conditions, but that within the same climatic area the type of soil is a major factor. Key words: Red clover, seed production, soil effect, year of harvest, cultivar, yield components

Rendement potentiel en semence l'année du semis de cultivars de trèfle rouge

1994 ◽  
Vol 74 (4) ◽  
pp. 807-809 ◽  
Author(s):  
Lucius Belzile
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Seed Weight ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Dominant Effect ◽  
Age Diversity ◽  
Trifolium Pratense L ◽  
Clover Seed ◽  
Moisture Conditions

The potential of seed production of red clover (Trifolium pratense L.) in the seeding year was studied for 4 yr using five cultivars on two soil types. Data were collected on seed yield, weight and germination. Yields of up to 580 kg ha−1 were obtained. Interactions of the effects of soil, year and cultivar on seed yield were observed. The absence of a dominant effect on seed yield is probably related to the varying moisture conditions among years and the age diversity of the plant population from which seeds were harvested. Seed germination varied among years and cultivars and seed weight among cultivars. Key words: Red clover, seed production, cultivar, seeding year

scholarly journals Review of seed yield components and pollination conditions in red clover (Trifolium pratense L.) seed production

Euphytica ◽  
2021 ◽  
Vol 217 (4) ◽  
Author(s):  
Shuxuan Jing ◽  
Per Kryger ◽  
Birte Boelt
Keyword(s):  
Reproductive Success ◽  
Seed Production ◽  
Seed Yield ◽  
Yield Components ◽  
Trifolium Pratense ◽  
Comprehensive Evaluation ◽  
Red Clover ◽  
Reproductive Traits ◽  
Seed Yield Components ◽  
Clover Seed

AbstractRed clover (Trifolium pratense L.) is an important forage legume grown in many of the temperate regions around the world. In order to evaluate possible causes for the low seed yield in particular in tetraploid red clover, we surveyed 71 studies of red clover seed production published from 1948 to 2019, reviewing seed yield components, pollination and reproductive traits. Seed yield components are recorded to contribute to and improve our understanding of the complex processes leading to the red clover seed yield. However, the measurement approaches varied largely among the studies, depending on whether the seed yield components are directly measured or calculated. Red clover seed production is dependent on insect pollen transfer. However, much uncertainty of pollination and reproductive success remains. Pollination conditions were often neglected: one third of the papers did not mention pollination conditions. The information that connects pollination and seed set are lacking, very few studies measured traits in floral morphology, ovule fertilisation and seed maturation. We suggest that consistent and comprehensive evaluation of pollination and reproductive success are required to improve our understanding of reasons for the low seed yield in red clover and hence the possibilities for future improvement.

scholarly journals Boron application in red clover (Trifolium pratense L.) seed production

2015 ◽  
Vol 54 (1) ◽  
pp. 59-63 ◽  
Author(s):  
Dalibor Tomić ◽  
Vladeta Stevović ◽  
Dragan Đurović ◽  
Milomirka Madić ◽  
Nikola Bokan ◽  
...  
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Trifolium Pratense ◽  
Acid Soil ◽  
Red Clover ◽  
Relative Increase ◽  
Second Growth ◽  
Trifolium Pratense L ◽  
Second Year ◽  
Positive Effect

AbstractA field trial with four red clover cultivars was established on acid soil in order to evaluate the effect of foliar boron application on seed yield. The crop received foliar boron treatment during the second growth of the second year at two applications. Although seed yield showed a significant increase in boron-treated plants in 2011 compared with control (26.0%), its relative increase was far higher in 2010 (43.2%), which had increased total rainfall amounts during flowering. Sufficient level of boron supply to red clover plants for seed production has a remarkably positive effect under conditions hampering pollination and fertilisation.

scholarly journals Seed Production of Red Clover (Trifolium pratense L.) under Danish Field Conditions

Agriculture ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1289
Author(s):  
Shuxuan Jing ◽  
Birte Boelt
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Seed Weight ◽  
Trifolium Pratense ◽  
Seed Set ◽  
Red Clover ◽  
Flower Head ◽  
Trifolium Pratense L ◽  
Thousand Seed Weight ◽  
High Seed Yield

High and stable seed yield is critical for red clover (Trifolium pratense L.) seed production and the commercial exploitation of the crop. A three-year experiment was conducted from 2013 to 2015 under Danish field conditions to explore the influence of precipitation during peak flowering on the seed yield of three red clover cultivars. We investigated the flowering duration and intensity based on a visual scale assessment, seed yield, and thousand seed weight in all three experimental years. In 2014 and 2015 we measured the seed yield components of floret number per flower head, seed number per flower head, and seed set. During the experimental period, high seed yields of more than 1000 kg ha−1 were obtained for the diploid cultivars ‘Rajah’ and ‘Suez’. Although a relatively high seed yield of 500 kg ha−1 was obtained in the tetraploid cultivar ‘Amos’, this was only around half of the seed yield and seed set of the diploid cultivars. Precipitation during peak flowering positively influenced the seed yield and thousand seed weight for the three cultivars. We conclude that observations of flowering phenology are required to determine the impact of environmental conditions on seed yield in red clover cultivars. Further, adequate water supply during peak flowering is important to obtain the high seed yield of red clover.

EFFECTS OF ISOLATION DISTANCE AND BORDER REMOVAL ON CONTAMINATION IN RED CLOVER SEED PRODUCTION

1975 ◽  
Vol 55 (2) ◽  
pp. 391-395 ◽  
Author(s):  
P. PANKIW
Keyword(s):  
Seed Production ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Minor Degree ◽  
Trifolium Pratense L ◽  
Foundation Seed ◽  
Isolation Distance ◽  
Isolation Distances ◽  
Clover Seed ◽  
A Minor

A recessive white-flowered strain of the red clover (Trifolium pratense L.) cultivar LaSalle was used as a marker to study the effects of various isolation distances and border removal on contamination of small plots. The clover was pollinated primarily by honey bees (Apis mellifera L.) and to a minor degree by Bombus spp. When bloom on the contaminant area was equal to bloom on the marker plots, the contamination of contiguous (0–183 m), 50 m, 100 m, 183 m and 274 m was 5.0, 4.4, 3.4, 2.5 and 2.6%, respectively. When contaminant bloom was four times as great as bloom on marker plots, contamination was twice as high. Contamination was considerably higher in the perimeter of the plots, with a gradual decrease towards the center of the plots. It is suggested that the present isolation distance of 183 m, with a minimum of contaminant bloom in the area, be retained for the smaller acreages of foundation seed, but that for larger fields as occurs with certified seed production, border removal in lieu of isolation distance may be a practical alternative.

scholarly journals The Effects of Red Clover Seed Treatment with Cold Plasma and Electromagnetic Field on Germination and Seedling Growth Are Dependent on Seed Color

2021 ◽  
Vol 11 (10) ◽  
pp. 4676
Author(s):  
Anatolii Ivankov ◽  
Rasa Zukiene ◽  
Zita Nauciene ◽  
Laima Degutyte-Fomins ◽  
Irina Filatova ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Cold Plasma ◽  
Trifolium Pratense ◽  
Root Nodules ◽  
Germination Rate ◽  
Red Clover ◽  
Seed Color ◽  
Seed Treatments ◽  
Capacitively Coupled ◽  
Clover Seed

This study aimed to estimate the effects of cold plasma (CP) and electromagnetic field (EMF) treatment of red clover (Trifolium pratense) seeds with different coat colors on germination kinetics, the content of seed phytohormones, and the growth of seedlings. Seeds of red clover cultivar ‘Arimaiciai’ were treated with radio-frequency EMF or capacitively coupled low-pressure CP for different durations. There were no differences in germination kinetics between yellow, brown, and dark purple seeds in control, but the germination rate of seeds treated with CP and EMF depended on seed color: The germination of yellow seeds was stimulated stronger compared to dark purple and brown seeds, and EMF did not stimulate germination in brown seeds. The content of phytohormones in control seeds and the shift in their amount induced by seed treatments were also strongly dependent on seed color. No relationship was found between the effect on germination kinetics and changes in phytohormone levels. In the control, seedlings growing from the yellow seeds were heavier, and the number of root nodules was 12.5 times larger compared to seedlings of dark purple seeds. Seed treatments with CP and EMF significantly increased the number of root nodules, and this effect was stronger in seedlings from dark purple seeds compared to those from yellow seeds.

scholarly journals Creating and Characterisation of New Red Clover Variety ‘Jancis’/ Sarkanâ Âboliòa Ðíirnes ‘Jancis’ Izveidoðana Un Tâs Raksturojums

2014 ◽  
Vol 68 (3-4) ◽  
pp. 180-183
Author(s):  
Biruta Jansone ◽  
Sarmīte Rancāne ◽  
Pēteris Bērziņš ◽  
Aldis Jansons
Keyword(s):  
Seed Yield ◽  
Red Clover ◽  
Climatic Conditions ◽  
Family Selection ◽  
High Dry Matter ◽  
Bright Pink ◽  
Long Stem ◽  
Dark Green ◽  
High Seed Yield

Abstract The aim of this work was to develop a red clover variety adapted to agro-climatic conditions of Latvia, suitable for different requirements of forage producers, resistant to most widespread diseases and producing high seed yield annually. Medium late ripening diploid red clover variety ‘Jancis’ was created at the LLU Research Institute of Agriculture in long-term work carried out since 1985. After free pollination of best samples of red clover collections from the VIR (St. Petersburg), individual and family selection among hybrids were carried out for approximately 20 years. Finally, best breeding line Nr. 43047 was registered as a variety ‘Jancis’. The variety is characterised by good winter hardiness, high dry matter yield (10-12 t·ha-1) and good persistence in the sward - up to 3-4 years. The variety is characterised by a long stem (90-110 cm) with 8-9 internodes, dark green leaves with a distinctive brighter picture, medium length and width of medial leaflet, and bright pink flower heads. ‘Jancis’ has stable annual seed yield in the conditions of Latvia; under favourable conditions reaching 500- 600 kg·ha-1 seeds. Since 2010, the variety ‘Jancis’ has been included in the common Latvian and EU Plant Variety Catalogue.

scholarly journals Researches on the Main Characteristics of Red Clover Seedlings and their Influence in

2012 ◽  
Vol 69 (1) ◽  
Author(s):  
Marioara GREBENIȘAN ◽  
Doru PAMFIL ◽  
Dorottya Alice DOMOKOS
Keyword(s):  
Plant Breeding ◽  
Seed Production ◽  
Red Clover ◽  
Production Level ◽  
Seed Crop ◽  
Binding Process ◽  
Lower Variability ◽  
Clover Seed ◽  
Number Of Seeds

Concerning the red clover breeding, it is essential to choose as genitors those varieties that possess good characteristics. In order to identify potential genitors, two red clover varieties were studied at Cluj-Napoca: Roxana, diploid variety and Napoca-tetra, tetraploid variety. The analyzed traits comprised the number of capitula/plant, number of seeds/capitulum and the binding process, under the aspect of their contribution to the seed crop and the interaction between those components, in order to provide important clues about di-and tetraploid red clover seed production, for plant breeding. The highest variability (s%=30) presented regarding the number of flowers/capitulum, diploid variety comparatively with a lower variability (s%=26) regarding the number of flowers number/capitulum, tetraploid varieties. Several traits were compared between di-and tetraploid red clover varieties in order to find genitors which can be used for creating new genotypes with high seed production level.

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