scholarly journals GENETIC DIVERSITY OF ASH GOURD (Benincasa hispida) GENOTYPES

2015 ◽  
Vol 26 (2) ◽  
pp. 01-08
Author(s):  
M. G. Rabbani ◽  
U. A. Naher ◽  
S. Pramanik ◽  
M. K. Quais
Keyword(s):  
Sex Ratio ◽  
Genetic Divergence ◽  
Field Performance ◽  
Average Weight ◽  
Performance Variability ◽  
Benincasa Hispida ◽  
Wide Range ◽  
Minimum Number ◽  
Ash Gourd ◽  
Fruit Diameter

An experiment was conducted to study the field performance, variability and genetic divergence for yield and yield contributing characters of 46 ash gourd genotypes at the Horticulture Farm, Bangladesh Agricultural University, Mymensingh. Wide range of variations were found among the ash gourd genotypes in respect of different parameters such as vine length at harvest, fruit length, fruit diameter, sex ratio, number of fruits plant-1, average weight fruit-1 and yield plant-1. The genotype BH21 showed the highest performance in number of fruits plant-1 and yield plant-1. In respect of average weight fruit-1, the genotype BH16 produced the heaviest (1.86 kg) fruit and the genotype BHl7 produced the lightest (0.67 kg) fruit. The genotype BH18 had the highest sex ratio (8.16) and the genotype BH14 had the lowest sex ratio (3.44). In case of number of fruits plant-1, the genotype BH46 and BH53 had the minimum number of fruits (1.33) and the genotype BH21 had the maximum number of fruits (16.16) per plant which was statistically similar with the genotype BH12 (15.00). The genotypes were also tested for genetic divergence utilizing the multivariate analysis. The genotypes were grouped into eight clusters. However, there was no relationship found between genetic divergence and geographic distribution of the genotypes.

scholarly journals GENETIC DIVERGENCE IN ASH GOURD (Benincasa hispida Thunb.)

2013 ◽  
Vol 20 (1) ◽  
pp. 19-24 ◽  
Author(s):  
F. Afroze ◽  
M. G. Rasul ◽  
A. K. M. Aminul Islam ◽  
M. A. K. Mian ◽  
T. Hossain
Keyword(s):  
Genetic Diversity ◽  
Genetic Divergence ◽  
Male Flower ◽  
Fruit Weight ◽  
Geographical Isolation ◽  
Benincasa Hispida ◽  
Cluster Distance ◽  
Total Divergence ◽  
Different Origins ◽  
Ash Gourd

Genetic divergence among 46 ash gourd genotypes from different origins was investigated to select the parents for hybridization using Mahalanobis D2 statistics. Though the genotypes grouped into seven clusters, the pattern of distribution of the genotypes into different clusters were random indicating that the geographical isolation was not always related to genetic diversity. Characters like fruit weight, fruits per plant, days to first male flower and nodes for first male flower contributed considerably to the total divergence. Maximum inter-cluster distance between cluster III and IV indicating wide genetic divergence between the genotypes of these two clusters (cluster III and IV followed by cluster IV and VII). However, the intra-cluster distances were smaller than inter-cluster distances. Thus, crossing between the genotypes of these two groups (cluster III and IV) would produce high heterotic progeny and may produce new recombinants with desired traits.DOI: http://dx.doi.org/10.3329/bjpbg.v20i1.17014

Cell Size and Pretransplant Nutritional Conditioning Influences Early Vine Growth and Yield of Transplanted Watermelon

HortScience ◽  
1998 ◽  
Vol 33 (4) ◽  
pp. 594e-594
Author(s):  
Charles J. Graham
Keyword(s):  
Cell Volume ◽  
Significant Influence ◽  
Field Performance ◽  
Dry Weight ◽  
Soluble Solids ◽  
Growth And Yield ◽  
Average Weight ◽  
Shoot Dry Weight ◽  
Solids Concentration ◽  
Soluble Solids Concentration

Research is needed to better understand the influence of cell volume and fertility on watermelon transplant size and field performance in order to determine the most economic production practices. `Jubilee' watermelon transplants were grown using a 4 x 4 factorial experimental design consisting of 4 cell volumes (30.7, 65.5, 147.5, and 349.6 cm3) and 4 fertility rates (0, 1/4, 1/2, and full-strength Hoagland's solution). Transplant shoot dry weight significantly increased as cell volume and fertility increased. Increasing cell volume linearly increased watermelon number/ha and tons/ha for early and total harvest in 1995. The average weight per watermelon significantly increased for early-harvested fruit but not for total harvest as cell volume increased in 1995. Soluble solids concentration linearly increased with increasing cell volume for early and total harvests in 1995. Cell volume had no significant influence on the harvest parameters measured in 1997. In 1995, increasing fertility linearly increased watermelon number/ha and tons/ha for early harvests. Increasing fertility increased the soluble solids concentration linearly for early-harvested watermelons in 1997 but not in 1995. Fertility rate had no significant influence on any of the other harvest parameters measured in 1995 and 1997. The growing conditions and disease pressure in 1997 reduced melons/ha, yield, and soluble solids content when compared to 1995 values. The half-strength Hoagland's solution produced the greatest number of watermelons/ha, tons/ha, and the highest soluble solids concentration in 1995 and 1997. Pretransplant nutritional conditioning had no significant effect on total `Jubilee' watermelon production in Louisiana for 1995 and 1997.

An intelligent algorithm for autonomous scientific sampling with the VALKYRIE cryobot

2017 ◽  
Vol 17 (3) ◽  
pp. 247-257 ◽  
Author(s):  
Evan B. Clark ◽  
Nathan E. Bramall ◽  
Brent Christner ◽  
Chris Flesher ◽  
John Harman ◽  
...  
Keyword(s):  
Human Performance ◽  
Autonomous Underwater Vehicles ◽  
Field Performance ◽  
Planetary Science ◽  
Operating Environment ◽  
Intelligent Algorithm ◽  
Future State ◽  
Science Operations ◽  
Wide Range ◽  
Matanuska Glacier

AbstractThe development of algorithms for agile science and autonomous exploration has been pursued in contexts ranging from spacecraft to planetary rovers to unmanned aerial vehicles to autonomous underwater vehicles. In situations where time, mission resources and communications are limited and the future state of the operating environment is unknown, the capability of a vehicle to dynamically respond to changing circumstances without human guidance can substantially improve science return. Such capabilities are difficult to achieve in practice, however, because they require intelligent reasoning to utilize limited resources in an inherently uncertain environment. Here we discuss the development, characterization and field performance of two algorithms for autonomously collecting water samples on VALKYRIE (Very deep Autonomous Laser-powered Kilowatt-class Yo-yoing Robotic Ice Explorer), a glacier-penetrating cryobot deployed to the Matanuska Glacier, Alaska (Mission Control location: 61°42′09.3″N 147°37′23.2″W). We show performance on par with human performance across a wide range of mission morphologies using simulated mission data, and demonstrate the effectiveness of the algorithms at autonomously collecting samples with high relative cell concentration during field operation. The development of such algorithms will help enable autonomous science operations in environments where constant real-time human supervision is impractical, such as penetration of ice sheets on Earth and high-priority planetary science targets like Europa.

scholarly journals Evaluation of Seven Complex Pennisetum Hybrids for Container and Landscape Performance in the Pacific Northwestern United States

2013 ◽  
Vol 23 (4) ◽  
pp. 525-528 ◽  
Author(s):  
Ryan N. Contreras ◽  
Jim Owen ◽  
Wayne Hanna ◽  
Brian Schwartz
Keyword(s):  
United States ◽  
Growth Form ◽  
Field Performance ◽  
Eastern United States ◽  
Randomized Experiments ◽  
Climatic Regions ◽  
The Pacific ◽  
Wide Range ◽  
Complex Hybrid ◽  
Market Preference

Ornamental grasses such as fountaingrass or napiergrass, collectively called pennisetums, belong to the genus Pennisetum, which is a diverse genus with over 80 species adapted to a wide range of climatic regions and known for its drought tolerance. Breeding efforts have led to improvements such as more intense purple foliage color, disease resistance, and apparent sterility. These improved forms have been developed and tested in the eastern United States. The objective of this research was to evaluate container and field performance of seven new complex hybrid pennisetums in the Pacific northwestern United States. Two completely randomized experiments with three replications were conducted over 2 years (2010 and 2011) at two locations. We selected seven trispecific hybrid pennisetums resulting from interploid and interspecific crossing that were given accessions Tift 5, Tift 6, Tift 10, Tift 11, Tift, 13, Tift 15, and Tift 26. Experiment 1 evaluated container performance in Corvallis, OR, while Expt. 2 evaluated field performance in Aurora, OR. Size index (SI), growth form rating, and color rating were collected and analyzed separately by location. In the container study, significant differences were observed among selections for growth form in 2010 and color ratings in both 2010 and 2011. In 2010, Tift 6, Tift 11, Tift 13, and Tift 15 had the highest growth form rating. For color rating, Tift 5, Tift 10, and Tift 26 were among the four highest rated selections in both years. In the field study, Tift 5, Tift 10, Tift 11, and Tift 26 had the highest SI when data were pooled over the 2 years, but all selections reached acceptable size for landscape use during both years of the study. Similarly, there were color differences among selections with Tift 5, Tift 10, Tift 15, and Tift 26 being highest rated. None of the selections survived below winter temperatures of −5 °C at either location during either year of the study. Our evaluations indicate that these selections have potential in the Pacific northwestern United States as annuals. Differences in complex hybrid pennisetums were observed in SI, growth form rating, and color rating. These differences demonstrated the variation among selections and will allow producers to choose desired traits based on market preference.

Determination of effective standards for the introduction of fodder additive Aquatan in the diet of rainbow trut with a biological assessment of the influence on fisheries

2021 ◽  
pp. 66-78
Author(s):  
Dmitry Dmitrievich Zekov ◽  
Mikhail Vladimirovich Ulyanov ◽  
Daniil Veniaminovich Mikryakov ◽  
Tatyana Alexandrovna Suvorova
Keyword(s):  
Rainbow Trout ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Feed Additive ◽  
Average Weight ◽  
Leningrad Region ◽  
Plant Materials ◽  
Wide Range ◽  
Mass Accumulation

In connection with the global tendency to prohibit the use of antibiotics in animal husbandry, the prospect of using in ichthyopathological practice preparations from plant materials, which are mostly non-toxic, rarely cause side effects, have an antibacterial effect against a wide range of pathogens of bacterial diseases, opens up. One of these preparations is the feed additive Aquatan (Farmatan Aqua) based on ellagitannins from sweet chestnut wood manufactured by Tanin Sevnica (Slovenia). The aim of this work was to study the effect of different dosages of Aquatan on the survival rate, the rate of mass accumulation and the growth rate of rainbow trout reared in the industrial conditions of the cage farm on the waste warm waters of the nuclear power plant and to assess the production and economic efficiency of the application. The tests were carried out for 34 days in February-March 2021 on the basis of an aquaculture cage farm of LLC “Fish Federation”, located in the water area of the waste canal of warm waste water of the Leningrad nuclear power plant (LNPP) in the area of the LNPP-2 industrial zone in the city of Sosnovy Bor, Leningrad Region. The object of the study is rainbow trout yearlings brought from different fish farms. A total of 247,131 specimens were planted, with an average weight of 156.5–235.7 g and a total weight of 43 950.67 kg. The main hydrochemical indicators of water at the enterprise for the trial period met the water quality requirements for growing salmon fish OST 15.372-87. The feeding was carried out with the production compound feed for salmonids of the firm Alltech® Coppens Supreme-22. In experimental cages, fish were fed with compound feed with the addition of the preparation Aquatan at various concentrations (1, 2, and 3 g/kg of feed); in the control, feed without additive was used. As a result of the experiment, a positive effect of the Aquatan additive in dosages of 2–3 g / 1 kg of feed on growth, mass accumulation, survival and feed costs was established, while when adding 1 g / 1 kg of feed, such an effect was not recorded.

Conclusion

2017 ◽  
Author(s):  
Gregory L. Carter ◽  
Maryanne L. Fisher
Keyword(s):  
Sex Ratio ◽  
Operational Sex Ratio ◽  
Future Research ◽  
Female Competition ◽  
Mate Poaching ◽  
Attitudes And Behaviors ◽  
Theoretical Perspectives ◽  
Wide Range ◽  
Mate Copying

This handbook has presented a wide range of theoretical perspectives on the motivations, attitudes, and behaviors involved in female competition. Using a metatheoretical framework, the contributors have examined how, when, and why women compete. This conclusion articulates the book’s main themes, beginning with evidence regarding women as active, competitive individuals and the value of mating information, addressing topics such as women’s competitive choices regarding mate copying, mate poaching, and mate retention. It then considers the role of intrasexual aggression in adolescence in relation to dating and reproduction, the importance of Operational Sex Ratio (OSR) to female competition, the concept of cooperative mothering or allomothering, and infanticide. It also discusses women as competitors in both traditional and novel social arenas as well as the role of women’s physiology in their competitive behaviors. Finally, it suggests directions for future research on topics that warrant further scrutiny.

scholarly journals Performance of ash gourd (benincasa hispida) in intercrop with different leafy vegetables

2017 ◽  
Vol 28 (2) ◽  
pp. 92-99
Author(s):  
N Sultana ◽  
MAH Khan ◽  
S Akhtar ◽  
MS Zaman ◽  
ASMMR Khan
Keyword(s):  
Leafy Vegetables ◽  
Gross Margin ◽  
Corchorus Capsularis ◽  
Benincasa Hispida ◽  
Suitable Combination ◽  
Total Productivity ◽  
Phosphorus And Potassium ◽  
Experimental Findings ◽  
Low Nitrogen ◽  
Ash Gourd

Due to depletion of per capita land, consistent stress on improving factor productivity has warranted many alternative cropping strategies. The intercropping effect of red amaranth (Amaranthus gangeticus Linn, var. BARI Lalshak-1), jute leaf (Corchorus capsularis, var. Local) and stem amaranth (Amaranthus tricolor var. BARI Data-1) on the yield performance and thereby economic return of ash gourd as main crop was tested in low nitrogen and medium phosphorus and potassium under Netrakona district of Bangladesh. The experiment consisted of four crop combinations viz., sole ash gourd, ash gourd + red amaranth, ash gourd + jute leaf and ash gourd+ stem amaranth.Companion vegetables did not influence on the yield and yield parameters of ash gourd. Although, the highest yield was obtained from sole ash gourd (34.11 t ha-1)which was close to ash gourd + jute leaf (30.65 t ha-1) followed by ash gourd + red amaranth ( 29.34 t ha-1) intercrop combination. By intercropping of ash gourd with different vegetables, total productivity increased up to 6-16% over sole ash gourd due to the contribution of companion crops. The highest ash gourd equivalent yield (39.61 t ha-1) was recorded from ash gourd + stem amaranth combination. Ash gourd + stem amaranth combination gave the highest monetary returns in respect of gross return (Tk. 296880 ha-1) and gross margin (Tk. 174433 ha-1). The LER and ATER value for all the treatments were above one and this indicated that intercropping in ash gourd is biologically efficient. Considering the experimental findings, ash gourd + stem amaranth might be suitable combination for higher productivity and economic return.Progressive Agriculture 28 (2): 92-99, 2017

scholarly journals The Effects of Different Sizes of Tree Shelters on Blue Oak (Quercus douglasii) Growth

2001 ◽  
Vol 16 (4) ◽  
pp. 153-158 ◽  
Author(s):  
Douglas D. McCreary ◽  
Jerry Tecklin
Keyword(s):  
Field Performance ◽  
Height Growth ◽  
Average Height ◽  
Quercus Douglasii ◽  
Tree Shelters ◽  
Blue Oak ◽  
Promising Tool ◽  
Wide Range ◽  
Stock Types ◽  
Time Required

Abstract Tree shelters have been used effectively in many locations to establish a wide range of tree species including oaks. However, their efficacy in Mediterranean climates like the hardwood rangelands of California has not been thoroughly tested. This study evaluated the field performance of blue oak (Quercus douglasii)—a species that is reported to be regenerating poorly in many locations in the state—protected by several sizes of tree shelters and compared response of directly sown acorns to that of 4-month-old transplants. After five growing seasons, seedlings in all sizes of tree shelters are larger than their unprotected counterparts. Tree shelters have been especially effective in promoting rapid height growth. However, regardless of tree shelter size, when seedlings grew above the tops of the shelters, average height growth diminished and diameter growth increased. Differences among stock types were relatively small, although transplants tended to perform better than directly sown acorns. These results suggest that tree shelters can greatly reduce the time required by seedlings to grow to a size where they are less vulnerable to browsing. As such, they appear to be a promising tool in efforts to regenerate blue oak in California. West. J. Appl. For. 16(4):153-158.

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