that may affect crop emergence is seed size. Edamame seed mass is ≈30 g/100-seed compared with 15 to 20 g/100-seed for grain-type soybean ( Bernard, 2005 ; Dong et al., 2014 ; Williams, 2015 ). The literature is inconclusive on how seed size affects
sweetpotato slips (D. Godwin, D. Scott, and J. Jones, personal communication). However, a lack of knowledge exists on what is the optimum seed root density and size for production of sweetpotato slips. Depending on grower’s equipment, the propagation beds are
chromosome size, nuclear volume, and cellular volume ( Bennett, 1987 ; Grant, 1987 ), which has been called nucleotype effects ( Bennett, 1972 ). The nucleotype effects can cause variation in phenotypic traits such as seed mass, and many previous studies
( Cucurbita sp.) ( Robinson and Decker-Walters, 1997 ). Watermelon production is mainly focused on the edible flesh of the fruit, placing a premium on fruit characteristics. Seed size is important because watermelon breeders aim to develop hybrid cultivars
mutants of Hydrangea after treating seeds with EMS, but the frequency and degree of dwarfing was not reported. Fig. 3. Size index [SI = (Height × Width 1 × Width 2 ) 1/3 ] of 4-year-old Sarcococca confusa plants derived from seed exposed to increasing
Abstract
Nine seedling populations involving small-, intermediate-, and large-seeded parental clones of tetraploid blackberries (Rubus sp., subgenus Eubatus) were evaluated for seed-size inheritance. All seedling progenies exhibited a wide range of seed sizes with high frequencies of transgressive segregation especially for small seed size The frequency distribution curves were skewed in the direction of small seed size. The data support a model for quantitative inheritance with partial dominance for small seed size. Calculations of heritabihty show an average maximum estimate of 97%, supporting previous observations of the lack of environmental effects on the expression of seed size in blackberries.
Abstract
Pooled data from several cultivars of highbush blueberry (Vaccinium corymbosum L.) and rabbiteye blueberry (V. ashei Reade) showed a highly significant correlation between fruit size and developed seed content although there were exceptions of individual cultivars means. Fruit size and seed no. decreased with progressively later harvests in all cultivars. Seed size differed among the various cultivars but was not related to fruit size. The % of total seeds that developed varied among cultivars and was correlated with fruit size.
The growing of transplants in plug cell trays is the primary method of producing brassica transplants in many countries. Seed quality is an important aspect to achieve success in transplant production. Seed size may affect seed performance, seedling growth and development of brassica transplants. Seeds of cauliflower (`Vitoria de vero') and cabbage (`Unio') from Embrapa Vegetables were used in this study. During seed conditioning, seeds were classified using round screens generating three (>1.5, 1.5-2.0, and 2.0-2.5 mm) and four (>1.5, 1.5-2.0, 2.0-2.5, and < 2.5 mm) seed size categories, for cauliflower and cabbage, respectively. The original seed lot was used as control. Seed weight increased with seed size. Seed germination (laboratory) and seedling emergence (greenhouse) were not affected by seed size. In both species, root and shoot weight, and leaf area, measured 30 days after seeding, in greenhouse conditions, increased with seed size. Also, transplants from larger seed size resulted in a significantly higher root weight, shoot weight, and leaf area relative to the original (control) seeds. The results indicate that, overall, an adequate seed conditioning improve brassica transplant quality.
Abstract
Seed counts of 2 size grades from 3 fruit sizes were made from 30 fruits each of 21 rabbiteye (Vaccinium ashei Reade) cultivars and selections. Total seeds/berry ranged from 110 for ‘Briteblue’ to 28 for selection T-111. Generally, larger fruit had more total and large seeds than smaller fruit; however, this relationship was not constant for all cultivars. Total seed number and number of large seeds per fruit appear to be heritable.
Objectives of this study were to determine the effects of lima bean seed size differences and a short chilling period after planting on seedling emergence rate, seedling abnormalities and vigor. Individual seeds of 'Jackson Wonder' lima bean were weighed and placed into one of five size classes: 24-33. 36-41. 44-49, 52-57, and 60-73 g per 100 seed. Seed of each size class were germinated at a constant 23-26C or chilled at 8C for 24 hrs and then moved to 23-26C conditions for the remainder of the study. A 24 hr chilling period after planting had a detrimental effect on subsequent lima bean seedling emergence only from 8 through 11 days after planting. Plant fresh and dry weights were significantly less for the chilled seed treatment. Temperature treatments had no effect on percent normal and abnormal seedlings or primary leaf area. No differences in seedling emergence number or rate were found among seed size classes. Smaller seedclasses had significantly fewer normal and more abnormal seedlings than larger seed size classes. The largest seed class produced seedlings with about two times more fresh and dry weights and leaf area than those from the smallest seed weight class. Plant fresh and dry weights and leaf areas from all seed size classes were significantly different from each other.