SEEDLING VIGOR STUDIES IN MORSHANSK BIRDSFOOT TREFOIL

1969 ◽  
Vol 49 (2) ◽  
pp. 203-208 ◽  
Author(s):  
B. E. Twamley
Keyword(s):  
Seed Size ◽  
Birdsfoot Trefoil ◽  
Seedling Vigor ◽  
Russian Strain ◽  
Unselected Population

Progenies of 60 birdsfoot trefoil plants out of the Russian strain Morshansk which differed in maturity, seed load, and seed size were evaluated for speed of germination, seedling vigor, and rate of tillering.The results indicated that, first, seed load is unlikely to affect greatly the seed size and seedling vigor of the progeny; secondly, late-maturing strains with good seedling vigor can be found; thirdly, in a population of progeny lines, 80% of the lines may be discarded on the basis of seed size without serious danger of discarding much good seedling vigor germplasm; fourthly, plants arising from large seeds had a pronounced tendency to tiller early; and, fifthly, speed of germination may be of considerable value in detecting lines with good seedling vigor in an unselected population, but is of limited value for that purpose within the large-seeded fraction of the population.

HERITABILITY FOR COMBINING ABILITY OF SEEDLING VIGOR IN BIRDSFOOT TREFOIL

1972 ◽  
Vol 52 (6) ◽  
pp. 1059-1065 ◽  
Author(s):  
B. E. TWAMLEY
Keyword(s):  
Seed Size ◽  
Combining Ability ◽  
Gene Action ◽  
Birdsfoot Trefoil ◽  
Seedling Vigor ◽  
Additive Gene Action ◽  
Predictive Values ◽  
Additive Gene ◽  
Estimate Heritability ◽  
Selection Of

Twenty birdsfoot trefoil families were studied, first, to investigate variation in seed size and seedling vigor; second, to determine predictive values of parental performance; and third, to estimate heritability for combining ability. The experimental material consisted of open-pollination seed collected from 20 parents and 10 daughters of each. It was examined for seed size and was used for a seedling vigor test. Wide variation for both seed size and for seedling vigor existed both within and among families. The performance of the parents with respect to neither seed size nor seedling vigor was a valid indicator of the combining ability of the daughters. Heritability for these traits was low. In the discussion, the postulate was made that in selecting material for the Syn 0 generation of a new cultivar on the basis of combining ability, greater emphasis should be placed on additive gene action. The program would involve the selection of only those plants that, in addition to being high in combining ability themselves, had offspring with a high combining ability average.

SEED SIZE AND SEEDLING VIGOR IN BIRDSFOOT TREFOIL

1967 ◽  
Vol 47 (5) ◽  
pp. 603-609 ◽  
Author(s):  
B. E. Twamley
Keyword(s):  
Seed Size ◽  
Forage Yield ◽  
Birdsfoot Trefoil ◽  
Seedling Vigor ◽  
Open Pollination ◽  
Original Population ◽  
Screening Techniques ◽  
Laboratory Screening ◽  
The Relationship ◽  
Made In

The relationship between seed size and seedling vigor in the field and greenhouse was determined for European-type birdsroot trefoil (Lotus corniculatus L).Sixty-four open-pollination progeny lines drawn from a nursery of 2,000 plants were grouped, on the basis of seed size, into eight classes each having eight lines. The largest-seeded lines were about twice as heavy as the smallest. Seedings were made in the greenhouse and in two field sites and the lines were evaluated visually and by weight for seedling vigor.The larger-seeded lines, on the average, outperformed the smaller ones but even they contained some poorer material. However, the best six lines all originated in the three larger-seeded classes. Forage yield in the greenhouse at six weeks of age provided a good index for predicting seedling vigor in the field.Suggestions are made for carrying out a breeding program aimed at developing a strain of trefoil excelling in seedling vigor. The scheme envisages the use of two laboratory screening techniques destined to eliminate all but the most vigorous lines and thereby to reduce the number of lines to be field-tested to 10% of the original population.

scholarly journals Size Variability in Seed Lot Impact Seed Nutritional Balance, Seedling Vigor, Microbial Composition and Plant Performance of Common Corn Hybrids

Agronomy ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 157
Author(s):  
Saveetha Kandasamy ◽  
Nimalka Weerasuriya ◽  
Daniella Gritsiouk ◽  
Greg Patterson ◽  
Soledad Saldias ◽  
...  
Keyword(s):  
Seed Size ◽  
Seed Quality ◽  
Nutritional Composition ◽  
Plant Performance ◽  
Growth Stages ◽  
Seedling Vigor ◽  
Microbial Composition ◽  
Corn Hybrids ◽  
Plant Vigor ◽  
Microbial Profile

Soils with highly uniform textural, physical, and chemical characteristics still give rise to crop stand variability. Seed quality is one of the factors adding to yield variability and has become a concern for corn growers. Hybrid seed producers claim that their seeds provide a uniformity in crop emergence and productivity, but they do not always provide detailed studies to support this claim. Based on growers’ concerns, we examined fields planted with three different hybrid varieties and found that 25% to 50% of the stand had relatively weak vigor, where seed variety A showed 15% of seedlings with lower vigor, and varieties B and C had 30% of seedlings with low vigor. These apparent differences in plant vigor prompted us to initiate a cursory investigation to identify how seed size influenced seedling vigor and if the seedling’s microbial profile played a role in the early growth stages of three commonly grown corn hybrids in Ontario. Seeds were separated based on size, prior to conducting a growth room study. Different sizes of seeds from the same seed lot showed significant differences in vigor capacity and related biometric components. Significant differences were also found in their nutritional composition and microbial profiles within the different seed sizes and the roots and shoots of seedlings derived from such seeds. The results clearly indicate that seed size greatly impacts the plant growth and its microbiome, resulting in seedlings with different plant vigor, microbiomes, and performance.

MATERNAL INFLUENCE IN BIRDSFOOT TREFOIL ON THE SEEDLING VIGOR OF THE PROGENY

1970 ◽  
Vol 50 (1) ◽  
pp. 103-106 ◽  
Author(s):  
B. E. TWAMLEY
Keyword(s):  
Seed Weight ◽  
Growth Habit ◽  
Morphological Type ◽  
Maternal Influence ◽  
Birdsfoot Trefoil ◽  
Seedling Vigor ◽  
Open Pollination ◽  
Early Type ◽  
The One ◽  
100 Seed Weight

Several hundred two-year-old nursery plants originating in the early-type trefoil cultivar Maitland were rated for flowering maturity, morphological features and growth pattern. Open-pollination seed was collected from these and 100-seed weight determinations were made.The experimental material was organized into two sections for testing purposes. In one, the effect of maternal maturity on the seedling vigor of the progeny was studied and in the other the effect of maternal morphology. Each section was made up of five classes, varying either in maturity or in morphology. Each class contained either nine or ten progeny lines. The range in seed size was similar for all classes. No relationship was found between maturity, morphological type or growth habit of the maternal parent on the one hand and the seedling vigor rating of their progeny at six and ten weeks of age on the other.The breeding implications of these findings are discussed.

VARIATION IN SEED AND SEEDLING TRAITS OF COMMON VETCH (VICIA SATIVA L.)

1979 ◽  
Vol 59 (2) ◽  
pp. 511-513 ◽  
Author(s):  
ESVET ACIKGOZ ◽  
M. D. RUM-BAUGH
Keyword(s):  
Seed Size ◽  
Vicia Sativa ◽  
Seedling Vigor ◽  
Emergence Time ◽  
Common Vetch ◽  
Negatively Associated ◽  
Seedling Size ◽  
Seedling Traits ◽  
Time Required ◽  
Seedling Characteristics

Significant differences among 25 common vetch (Vicia sativa L.) cultivars existed for each of eight seed and seedling traits. Weight of 50 seeds was positively correlated with seedling characteristics but not with time required for emergence. Emergence time was negatively associated with seedling size 14 days after planting. Breeders can select common vetch lines for seedling vigor by selecting for large seed size.

Sign in / Sign up

Export Citation Format

Share Document