scholarly journals Sweet potato genotypes with potential for early harvesting planted in different seasons in central Puerto Rico

1969 ◽  
Vol 87 (3-4) ◽  
pp. 105-112
Author(s):  
Agenol González-Vélez
Keyword(s):  
Puerto Rico ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Root Weight ◽  
Fresh Market ◽  
Marketable Yield ◽  
Sweet Potato Weevil ◽  
Different Seasons ◽  
Important Trait ◽  
Planting Season

Eight genotypes of sweet potato (Ipomoea batatas) were evaluated in four different planting seasons in the central region of Puerto Rico. Planting was in June, September, December and March. Harvesting was at 120 days after planting and data collected included yield, number of non marketable roots, average root weight and percentage of roots affected by the sweet potato weevil (Cylas formicarius var. elengatulus). Genotypes 97-031, 98-040 and 98-022 showed marketable yield (approximately 15,000 kg/ha) when harvested at 120 days after planting and also roots with few lobes, an important trait for fresh market use. Planting season significantly affected yield in the genotypes evaluated. Yields when sweet potato was planted in June, March and September doubled that of the December planting. The planting season significantly affected the percentage of root damage by the sweet potato weevil. Sweet potato planted in March showed significantly less damage than that of the other planting seasons.

Yield and Yield Components of Six Sweet Potato (Ipomoea batatas) Cultivars II. Variability and Possible Sources of Variation

1975 ◽  
Vol 11 (1) ◽  
pp. 49-58 ◽  
Author(s):  
S. B. Lowe ◽  
L. A. Wilson
Keyword(s):  
Sweet Potato ◽  
Yield Components ◽  
Ipomoea Batatas ◽  
Total Yield ◽  
Yield Variability ◽  
Tuber Development ◽  
Marketable Yield ◽  
Yield Variation ◽  
Planting Material ◽  
Sources Of Variation

SUMMARYVariabilities in total yield, marketable yield and components of yield (tuber numbers and mean tuber weights) were studied in six sweet potato cultivars over two seasons, in crops harvested at two dates. Yield variability was high, particularly in marketable tubers, and was related to either or both components of yield. High-yielding cultivars had lower variabilities and the commercial cultivar 049 the lowest. The contribution of yield components to variability in total yield was evaluated and sources of yield variation were attributed to planting material, tuber development and season.

scholarly journals ANALISIS KELAYAKAN USAHATANI UBI JALAR (Ipomoea batatas L.) VARIETAS CILEMBU DI DESA KEPUNDUNG KECAMATAN REBAN KABUPATEN BATANG

MEDIAGRO ◽  
2019 ◽  
Vol 14 (2) ◽  
Author(s):  
Laili Chasanah ◽  
Lutfi Aris Sasongko ◽  
Renan Subantoro
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Secondary Data ◽  
Transport Cost ◽  
Labor Costs ◽  
Land Area ◽  
Average Return ◽  
Tax Cost ◽  
Break Even Point ◽  
Planting Season

This Research aims to know the revenue level, and the feasibility level of Cilembu Varieties Sweet Potato Farming in terms of BEP and R/C. The basic method used is descriptive. Determination of location sample is done purposively. The data used are primary and secondary data. The data was collected by interview, recording and observation. The respondents in this study were 25 farmers. Based on research the total cost is Rp.1,423,483/planting season (for 0.1-0.15 ha land area), Rp.2,761,542/planting season (for 0.2-0.25 ha land area) and Rp.6,278,958/planting season (for 0.3–0.5 ha). Total costs consist of equipment depreciation costs, tax cost, tractor cost of fertilizer costs, pesticide costs, female labor costs, male labor costs, transport cost and sack costs. While revenue is Rp.1,535.000/planting season (for 0.1–0.15 ha), Rp.3,768,571/planting season (for 0.2–0.25 ha), Rp.8,666,667 planting season (for 0.3-0.5 ha). Based on the calculation, it is known that the average return sweet potato farm is Rp.111,518/planting season (for 0,1–0,15 ha), Rp.1,007,030/planting season (for 0.2–0.25 ha) and Rp.2,387,708/planting season (for 0.3–0.5 ha). BEP value of production quantity is equal to 1,311 kg/planting season (for 0.1–0.15 ha), 2,099 kg/planting season (for 0,2–0,25 ha) and 6,279 kg/planting season (for 0.3– 0.5 ha. While Break Even Point on price is Rp.1,079/kg (for 0.1–0.15 ha), Rp.1,179/kg (for 0.2–0.5 ha) and Rp.752/kg (for 0.3–0.5 ha). Based on the analysis of the R/C with a value of 1.07 for land area 0.1-0.5 ha, 1.36 for 0.2-0.25 ha land area and 0.38 for 0.3-0.5 ha.Keywords: Sweet Potato, Revenue, Return, BEP, R/C

scholarly journals Effect of Time of Planting on the Marketable Yield of Two Snap Bean Varieties at Isabela, Puerto Rico

1969 ◽  
Vol 59 (3) ◽  
pp. 219-221
Author(s):  
Gerardo Mangual Crespo
Keyword(s):  
Puerto Rico ◽  
Marketable Yield ◽  
Snap Bean ◽  
Planting Season ◽  
Made In

Snap bean experimental plantings established seasonally during 1972-73 at Isabela, P.R. demonstrated that the optimal planting season extends from December to March. Variety Contender outyielded Wade in all plantings and showed a tendency to flower twice. This characteristic is not detrimental if the harvest is to be made in several pickings but could be unfavorable if the once-over harvest system is to be adopted.

scholarly journals Effect of cutting position and vine pruning level on yield of Sweet Potato (Ipomoea Batatas L.)

1970 ◽  
pp. 01-05
Author(s):  
Ncube Netsai ◽  
Mutetwa Moses, Mtaita Tuarira
Keyword(s):  
Sweet Potato ◽  
Root Length ◽  
Ipomoea Batatas ◽  
Block Design ◽  
Root Diameter ◽  
Root Weight ◽  
Stem Cuttings ◽  
Storage Root ◽  
Storage Roots ◽  
Significant Difference

There is significant variation in yield of storage roots and vines of sweet potato (Ipomoea batatas) among farmers due to use of different cutting positions and pruning of vines at different levels. This study was carried out to establish the cutting position and the vine pruning level that give the best yield of both the storage roots and vines. The study was conducted in a 3x3 factorial arrangement in Randomized Complete Block Design (RCBD) with three replications. Treatments included cutting position at three levels (apical cutting, middle cutting and basal cutting) and pruning at three levels, 0%, 25% and 50% respectively. Pruning was done. 50 days after planting. And storage root harvesting was done 100 days after planting. The two measurements were summed up to give the total vine weight. Storage root length, diameter and weight were measured at 100 DAP. Storage root length indicated significant difference (P<0.05) only among cutting positions with highest mean length (16.20 cm) obtained from apical cutting and the lowest (11.98 cm) from basal cutting. Storage root diameter, storage root weight and vine weight indicated significant interaction (P<0.05) of cutting position and vine pruning level. Highest mean root diameter and root weight were obtained from middle cutting and 25% vine pruning level, with the lowest being obtained from basal cutting and 50% vine pruning level. Highest vine weight was recorded from middle cutting and 50% vine pruning level, with the lowest being recorded from basal cutting and 0% vine pruning level. Both middle and apical stem cuttings can be recommended for higher storage root and vine yield. Vine pruning at 25% can be adopted for higher storage root yield while pruning at 50% can be suggested for higher vine yield.

scholarly journals Agrobacterium–mediated transformation of cry3ca1 gene into kb1 sweet potato cultivar

2018 ◽  
Vol 40 (2) ◽  
pp. 252-258
Author(s):  
Vu Thi Lan ◽  
Pham Bich Ngoc ◽  
Chu Hoang Ha ◽  
Le Tran Binh
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Southern Hybridization ◽  
Potato Cultivar ◽  
Embryogenic Calli ◽  
Cylas Formicarius ◽  
The World ◽  
Sweet Potato Weevil ◽  
Transgenic Lines ◽  
Shoot Tip Explants

Sweet potato Ipomoea batatas (L.) Lam is an important food crop in the world as well as in Vietnam. Despite its many benefits, the production of sweet potato is restricted in many areas of the world by diseases, weed, and, particularly, pests. As an alternative, genetic transformation provides the means for complementing conventional breeding to improve sweet potato to resistant to pest. In this study, shoot tip explants of KB1 sweet potato variety were infected with A. tumefaciens C58 carying pBI101/cry3Ca1 con-struct. The selection were occured on callus producing medium (SM) containing 0.5 g/L picloram, 50 mg/L kanamycin and 500 mg/L cefotaxime. Survival embryogenic calli were then transferred to embryo producing medium (EG2) supplemented with 1.0 mg/L ABA and 1.0 mg/L GA3 after 2–3 weeks. Putative transgenic shoots regenerated on medium (RM) adding 0.5 mg/L kinetin and 1.0 mg/L BAP were rooted on root producing medium (RR). The tentative transgenic lines were proved positively by PCR and finalized by Southern hybridization, and biotest in laboratory. Conclusionly, we obtained 62 tentative transgenic sweet potato lines resistant to kanamycin. Among these lines, five putative transgenic lines were proved positively by Southern hybridization and have one copies of the cry3Ca1 gene. Two of them have the lower degree of infestation by sweet potato weevil (Cylas formicarius) than that of untransformed lines.

scholarly journals Genotype × Environment effects on morphological and productive components of sweet potato (Ipomoea batatasL.)

2021 ◽  
Vol 17 (5) ◽  
pp. 7-15
Author(s):  
Sindi Elen Senff ◽  
Viviane de Fátima Milcheski ◽  
Ana Caroline Basniak Konkol ◽  
Ana Carolina da Costa Lara Fioreze
Keyword(s):  
Sweet Potato ◽  
Block Design ◽  
Total Yield ◽  
Root Diameter ◽  
Root Weight ◽  
Marketable Yield ◽  
Yield Data ◽  
Growing Seasons ◽  
Environment Effects ◽  
Randomized Block Design

Sweet potato (Ipomoea batatasL.) is a crop with high market demands because of its well-known health benefits. Limited use of improved clones reduces the crop’s income potential. Plant breeding programs seek to selectgenotypes with good results in a variety of environments by evaluating the interaction effects of genotypes and environments. This study aimed to assess Clone × Growing season effects on morphological and productive parameters of sweet potato clones grown in the municipality of Curitibanos, Santa Catarina, Brazil, in 2016/2017 and 2017/2018. The following clones were evaluated: Brazlândia Rosada, BRS Amélia, Beauregard, BrazlândiaRoxa, and BRS Rubissol. A randomized block design with three replications was used to investigate root length, root diameter, mean root weight, total root number, number of marketable roots, total yield, and marketable yield. Data were subjected to one-way and two-way analysis of variance. Beauregard afforded the largest number of marketable roots and was stable in both growing seasons. Beauregard, Brazlândia Roxa, and Brazlândia Rosada differed in total number of roots between growing seasons. There were no significant differences between growing seasons in mean root weight; BRS Amélia afforded a higher mean root weight than Brazlândia Rosada. Beauregard did not differ in total or marketable yield between growing seasons and provided higher yields than the other clones. BRS Rubissol and Beauregard were found to be the most promising for sweet potato cultivation under the environmental conditions of Curitibanos.

scholarly journals EFFECT OF GYPSUM ON EARLY GROWTH AND YIELD OF SWEET POTATO.

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1078a-1078
Author(s):  
E. Niyonsaba ◽  
E. G. Rhoden ◽  
P. K. Biswas ◽  
G.W. Carver
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Dry Matter ◽  
Block Design ◽  
Early Growth ◽  
Growth And Yield ◽  
Root Weight ◽  
Storage Root ◽  
Root Yield ◽  
And Storage

A study was conducted to assess the effects of gypsum on the early growth and storage root yield of sweet potato (Ipomoea batatas) cvs `Jewel', `Goergia Jet' and `TI-155'. Three rates of gypsum were applied (1.03, 2.06 and 3.09 tons/acre). These represented half, recommended and 1.5 recommended levels. The experiment was a randomized complete block design with a split plot arrangement of treatment. Leaf area, total dry matter, leaf dry matter and stat-age root weight were recorded at 30-day intervals. Plants receiving half the recommended levels of gypsum produced the highest total storage root dry matter (0.306 t/a) and the highest leaf dry matter (0.116 t/a). Although a positive relationship exists between leaf dry matter and storage root yield between 90 and 120 days, there was no such relationship between those parameters either at 30 and 60 days or 60 and 90 days after transplanting.

Sign in / Sign up

Export Citation Format

Share Document