Effect of Timing of Irrigation on Total Nonstructural Carbohydrate Level in Roots and on Seed Yield of Alfalfa ( Medicago sativa L.) 1

Crop Science ◽  
1972 ◽  
Vol 12 (5) ◽  
pp. 634-636 ◽  
Author(s):  
Y. Cohen ◽  
H. Bielorai ◽  
A. Dovrat
Keyword(s):  
Medicago Sativa ◽  
Seed Yield ◽  
Carbohydrate Level ◽  
Nonstructural Carbohydrate ◽  
Medicago Sativa L

Field evaluation following two cycles of backcross transfer of somatic embryogenesis to commercial alfalfa germplasm

1993 ◽  
Vol 73 (1) ◽  
pp. 131-137 ◽  
Author(s):  
S. R. Bowley ◽  
G. A. Kielly ◽  
K. Anandarajah ◽  
B. D. McKersie ◽  
T. Senaratna
Keyword(s):  
Somatic Embryogenesis ◽  
Medicago Sativa ◽  
Seed Yield ◽  
Field Experiments ◽  
Field Evaluation ◽  
Growth Characteristics ◽  
Seed Technology ◽  
Artificial Seed ◽  
Medicago Sativa L

For successful application of artificial seed technology to alfalfa (Medicago sativa L.), parental plants must possess the necessary genes for somatic embryogenesis and produce progeny having high commercial value. A backcross procedure was initiated to transfer the ability to form somatic embryos from genotype A70-34, a selection from the cultivar Rangelander, to multiple-pest-resistant alfalfa germplasm. The objectives of this study were to evaluate the growth characteristics and seed yield of the F1; BC1 and BC2 generations to determine if introgression with commercial germplasm had improved the agronomic features of the embryogenic germplasm. This study consisted of two field experiments, each conducted at two locations. One experiment evaluated herbage growth characteristics and herbage production at Elora and Woodstock, Ontario, and the other evaluated seed yield at Elora and Delhi, Ontario. Significant increases in fall regrowth height, leaflet length:width ratio, and seed yield were detected over the cycles of crossing. By the BC2, fall dormancy and leaflet length:width ratio were similar to those in commercial populations. Although improvements in seed yield were detected, the BC2 was inferior in seed yield compared with commercial germplasm, and further introgression and (or) conscious selection for improved seed yield will be required. Through a population backcross procedure, it appears possible to develop commercial alfalfa germplasm capable of in vitro manipulation. Key words: Alfalfa, Medicago sativa L., somatic embryogenesis, artificial seed, backcross

EFFECTS OF ESTABLISHMENT METHOD AND A RAPESEED COMPANION CROP ON ALFALFA SEED YIELD

1987 ◽  
Vol 67 (1) ◽  
pp. 263-266 ◽  
Author(s):  
J. WADDINGTON ◽  
N. MALIK
Keyword(s):  
Medicago Sativa ◽  
Seed Production ◽  
Seed Yield ◽  
Brassica Campestris ◽  
Establishment Method ◽  
Alfalfa Seed ◽  
Medicago Sativa L ◽  
Companion Crop

In two experiments at Melfort using alfalfa (Medicago sativa L. ’Beaver’) seeded at a rate of 2 kg ha−1 with and without a Polish rapeseed (Brassica campestris L. ’Candle’) companion crop seeded at 5.5 kg ha−1, rapeseed yields in the establishment year were maximum when alfalfa and rapeseed were mixed and planted in 15-cm rows. Alfalfa showed no consistent seed yield differences between broadcast seeding, seeding in 15- or 61-cm rows, or seeding with or without the companion crop.Key words: Alfalfa, rapeseed, Brassica campestris, seed production

Effect of cutting management, seeding rates and sowing method on seed yield of alfalfa (Medicago sativa L.)

2020 ◽  
Vol 52 (4) ◽  
Author(s):  
Jamshaid Ahmad ◽  
Asif Iqbal ◽  
Athar Mahmood ◽  
Muhmmad Aamir Iqbal ◽  
Haroon Zaman Khan ◽  
...  
Keyword(s):  
Medicago Sativa ◽  
Seed Yield ◽  
Medicago Sativa L ◽  
Cutting Management

scholarly journals Effect of Row Spacing and Seeding Rate on Yield Component and Seed Yield of Alfalfa (Medicago sativa L.)

2010 ◽  
Vol 2 (1) ◽  
pp. 74-80 ◽  
Author(s):  
Gholamreza ABADOUZ ◽  
Abdollah HASANZADEH GORTTAPEH ◽  
Abdol Amir RAHNEMA ◽  
Adela BEHRADFAR
Keyword(s):  
Medicago Sativa ◽  
Seed Yield ◽  
Yield Component ◽  
Row Spacing ◽  
Seeding Rate ◽  
Medicago Sativa L

scholarly journals Genetic variation for seed yield and its components in alfalfa (Medicago sativa L.) populations

Agronomie ◽  
2000 ◽  
Vol 20 (3) ◽  
pp. 333-345 ◽  
Author(s):  
Eduardo-Daniel Bolaños-Aguilar ◽  
Christian Huyghe ◽  
Bernadette Julier ◽  
Christian Ecalle
Keyword(s):  
Genetic Variation ◽  
Medicago Sativa ◽  
Seed Yield ◽  
Medicago Sativa L

Effect of phalaris (Phalaris aquatica L.) and lucerne (Medicago sativa L.) density on seed yield and regeneration of subterranean clover (Trifolium subterraneum L.)

2000 ◽  
Vol 51 (2) ◽  
pp. 267 ◽  
Author(s):  
B. S. Dear ◽  
P. S. Cocks ◽  
A. D. Swan ◽  
E. C. Wolfe ◽  
L. M. Ayre
Keyword(s):  
Medicago Sativa ◽  
Seed Yield ◽  
Seed Bank ◽  
Seed Set ◽  
Basal Area ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Phalaris Aquatica ◽  
Medicago Sativa L ◽  
Clover Seed

A mixture of 3 subterranean clover (Trifolium subterraneum L.) cultivars (cvv. Goulburn, Seaton Park, and Dalkeith) was grown with 5–40 plants/m2 of phalaris (Phalaris aquatica L.) or lucerne (Medicago sativa L.) for 3 years at Wagga Wagga, NSW (147°21´E, 35°03´S). Clover seed yield was assessed each year, the number of regenerating clover seedlings was counted, herbage yield of clover and the perennials was measured, and the change in perennial density recorded. The influence of perennials on water availability in spring and light during clover seed set was also examined. The impact of perennial density on clover was assessed using regression analyses. In each of the 3 years, subterranean clover seed yield was negatively related to perennial density, but phalaris suppressed clover seed yield more than equivalent densities of lucerne in 2 of the years. Clover seed yield was positively related (R2 = 0.30–0.85) to clover biomass in spring in all 3 years (except for subterranean clover in phalaris in 1994) and to the proportion of total photosynthetically active radiation reaching the clover canopy beneath the perennial (R2 = 0.33–0.83) in 2 of the 3 years. There was a positive relationship between clover seedling regeneration in autumn and size of the summer seed bank in both years in lucerne (R2 = 0.40–0.76) and in 1 year in phalaris (R2 = 0.76) and a negative association between perennial density and clover seedling regeneration. The rate at which the surface profile (0–37 cm) dried in spring was independent of phalaris and lucerne density over the 3 years and did not differ from that of pure clover. The late season clover cultivar, Goulburn, constituted between 57% and 79% of the seed bank following seed set, substantially more than the earlier flowering cultivars, Seaton Park and Dalkeith. Neither perennial density nor species changed the relative competitiveness of the 3 cultivars. The high seed yield of Goulburn and the lack of a perennial-induced change in surface soil water in spring suggest that growing perennials in association with subterranean clover does not increase the level of moisture stress during clover seed set. The good performance of Goulburn is attributed to superior competitive ability for light in late spring. The basal area occupied by lucerne and phalaris increased with perennial density in each of the first 2 years. However, in the third year, phalaris basal area was similar at all densities. The findings suggest that sowing low densities of lucerne should assist in promoting seed yield and regeneration of subterranean clover. Management of phalaris, which has the capacity to substantially increase plant size at low densities, may require additional strategies such as more frequent grazing in spring.

Effects of row spacing and plant growth regulation on alfalfa seed yield (Medicago sativa L.)

2020 ◽  
Vol 52 (5) ◽  
Author(s):  
Duro Pajcin ◽  
Savo Vuckovic ◽  
Vera Popovic ◽  
Aleksandar Simic ◽  
Sandra Popovic ◽  
...  
Keyword(s):  
Plant Growth ◽  
Medicago Sativa ◽  
Seed Yield ◽  
Growth Regulation ◽  
Row Spacing ◽  
Plant Growth Regulation ◽  
Alfalfa Seed ◽  
Medicago Sativa L
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