2n Gametes for True Seed Production (TPS) in Potato: Basic and Applied Aspects

1992 ◽  
pp. 274-278
Author(s):  
Luigi Frusciante ◽  
Amalia Barone ◽  
Donatella Consoli ◽  
Clara Conicella ◽  
Luigi M. Monti
Keyword(s):  
Seed Production ◽  
2N Gametes ◽  
True Seed

scholarly journals Hybrid true seed production from potato mother plant as influenced by nitrogen splitting and boron

2020 ◽  
Vol 93 (1) ◽  
Author(s):  
Rajesh Chakraborty ◽  
Shahidul Islam ◽  
Tuhin Suvra Roy
Keyword(s):  
Seed Production ◽  
Maximum Yield ◽  
Potato Seed ◽  
True Potato Seed ◽  
Split Application ◽  
Maximum Weight ◽  
Factor B ◽  
True Seed ◽  
Two Factors ◽  
Plot Design

Experiments were conducted to show the effect of split application of nitrogen (SN) and boron (B) on hybrid True Potato Seed (TPS) production. The TPS-67 (♂) and MF-II (♀) were used as crossing materials. The experiments comprised two factors i.e., factor-A; nitrogen splitting (4 levels): 2 split (SN0-Conventional), 3 split (SN1), 4 split (SN2) and 5 split (SN3) where 50 kg N ha–1 applied as basal from total 300 kg N ha–1 with each split application and the rest 250 kg N ha–1 was splitted as per treatment at 10 days intervals started from 30 DAP (days after planting); and factor- B; boron (4 levels): 0 (B0), 4 (B1), 6 (B2) and 8 (B3) kg B ha–1 under split-plot design with three replications. We found that SN and/or B influenced the hybrid TPS production. The maximum yield (2160.1 mg) of TPS plant–1 was found from SN1B3 and the minimum (1001.8 mg) was in SN0B0. The maximum yield (172.81 kg) of TPS ha–1 was found from SN1B3 and the minimum (80.14 kg) was in SN0B0. The maximum weight (86.87 mg) of 100-TPS was found from SN3B3; whereas, the minimum (53.36 mg) was in SN0B0.

True seed production in garlic

1994 ◽  
Vol 7 (5) ◽  
Author(s):  
M.R. Pooler ◽  
P.W. Simon
Keyword(s):  
Seed Production ◽  
True Seed

Pollen fertility in relation to open pollinated true seed production in potatoes

1990 ◽  
Vol 67 (8) ◽  
pp. 499-505 ◽  
Author(s):  
Gisela C. Arndt ◽  
J. L. Rueda ◽  
H. M. Kidane-Mariam ◽  
S. J. Peloquin
Keyword(s):  
Seed Production ◽  
Pollen Fertility ◽  
True Seed

scholarly journals Kelayakan finansial teknologi produksi benih bawang merah asal biji botani (True Seed of Shallot = TSS) (Financial feasibility of True Seed of Shallot seed production technology)

2021 ◽  
Vol 31 (1) ◽  
pp. 81
Author(s):  
Witono Adiyoga ◽  
Mathias Prathama ◽  
Rini Rosliani
Keyword(s):  
Seed Production ◽  
Net Present Value ◽  
Cost Ratio ◽  
Internal Rate Of Return ◽  
Present Value ◽  
Benefit Cost Ratio ◽  
Financial Feasibility ◽  
True Seed ◽  
Break Even Point ◽  
Benefit Cost

<p>Penelitian dilaksanakan di Kebun Percobaan Margahayu, Balai Penelitian Tanaman Sayuran pada Maret-November 2018. Tujuan penelitian adalah mengestimasi kelayakan finansial teknologi produksi benih bawang merah TSS (True Seed of Shallot). Percobaan lapangan produksi benih dilakukan untuk luasan 1.500 m2. Keragaan usahatani dievaluasi melalui analisis anggaran usaha berdasarkan pencatatan usahatani. Sementara itu, kelayakan finansial dianalisis menggunakan NPV (Net Present Value), IRR (Internal Rate of Return),  B/C ratio (Benefit Cost Ratio) dan PBP (Pay Back Period). Hasil analisis anggaran menghasilkan indikator keragaan produksi benih sebagai berikut: (a) biaya produksi Rp. 255.320.280/hektar, (b) rasio penerimaan-biaya 1,49, (c) titik impas produksi 102 kg/hektar, dan (d) titik impas harga Rp. 1.789.628/kg. Analisis finansial berdasarkan parameter: periode proyeksi 3 tahun; aliran kas 12 bulan; suku bunga 18%/tahun; proporsi modal 40% (sendiri)  dan 60% (kredit); luas lahan 1 hektar; produktivitas 150 kg/ha; dan harga output Rp. 2.500.000/kg menghasilkan NPV = Rp. -108.564.638 (&lt;0), IRR = sampai tingkat bunga 2% masih menunjukkan besaran NPV yang negatif (&lt;18%), Net B/C Ratio = 0,62 (&lt; 1), dan PBP = 1,5 tahun (&lt; 3 tahun). Berbagai kriteria tersebut mengindikasikan bahwa usahatani produksi benih TSS belum dapat dikategorikan layak secara finansial. Analisis sensitivitas menunjuk-kan bahwa kelayakan finansial baru tercapai jika terjadi pengurangan biaya produksi minimal 22%. Kelayakan finansial juga dapat dicapai jika terjadi minimal 15% peningkatan produktivitas atau 15% peningkatan harga benih. Penelitian ini menyarankan studi lebih lanjut untuk mengidentifikasi agroekosistem produksi paling ideal berpotensi produktivitas optimal, serta memperbaiki teknologi produksi benih TSS berorientasi peningkatan produktivitas dan efisiensi penggunaan input. </p><p><strong>Keywords</strong></p><p>produksi benih; benih biji botani bawang; analisis anggaran;  kelayakan finansial</p><p><strong>Abstract</strong></p><p>A trial of 1,500 m2 seed production was conducted in the Indonesian Vegetable Research Institute during March-November 2018. The objective was to assess the financial feasibility of True Seed of Shallot (TSS) seed production technology. Farm performance was assessed by using enterprise budget, NPV (Net Present Value), IRR (Internal Rate of Return), B/C ratio (Benefit Cost Ratio), and PBP (Pay Back Period). Budget analysis results in (a) production costs of IDR 255,320,280/ ha, (b) revenue-cost ratio of 1.49, (c) 102 kg/ha yield break-even-point, and (d) IDR 1,789,628/kg price break-even-point. Meanwhile, financial analysis based on some predetermined parameters has provided NPV = IDR -108,564,638 (&lt;0), IRR = up to 2% interest rate still shows negative NPV value (&lt;18%), Net B/C Ratio = 0.62 (&lt;1), and PBP = 1.5 years (&lt;3 years). Those criteria suggest that TSS seed production business is not yet categorized as financially feasible. Sensitivity analysis shows that financial feasibility may be achieved if there is minimally 22% reduced cost of production, or 15% increased yield, or 15% increased seed price. Further studies on identifying the most ideal agro-ecosystem with optimal yield potential, and improving TSS technology with an orientation to increasing yield and input-use efficiency are recommended.</p>

scholarly journals Hybrid true seed production from potato mother plant as influenced by nitrogen splitting and boron

2020 ◽  
Vol 93 (1) ◽  
Author(s):  
Rajesh Chakraborty ◽  
Shahidul Islam ◽  
Tuhin Suvra Roy
Keyword(s):  
Seed Production ◽  
Maximum Yield ◽  
Potato Seed ◽  
True Potato Seed ◽  
Split Application ◽  
Maximum Weight ◽  
Factor B ◽  
True Seed ◽  
Two Factors ◽  
Plot Design

Experiments were conducted to show the effect of split application of nitrogen (SN) and boron (B) on hybrid True Potato Seed (TPS) production. The TPS-67 (♂) and MF-II (♀) were used as crossing materials. The experiments comprised two factors i.e., factor-A; nitrogen splitting (4 levels): 2 split (SN0-Conventional), 3 split (SN1), 4 split (SN2) and 5 split (SN3) where 50 kg N ha–1 applied as basal from total 300 kg N ha–1 with each split application and the rest 250 kg N ha–1 was splitted as per treatment at 10 days intervals started from 30 DAP (days after planting); and factor- B; boron (4 levels): 0 (B0), 4 (B1), 6 (B2) and 8 (B3) kg B ha–1 under split-plot design with three replications. We found that SN and/or B influenced the hybrid TPS production. The maximum yield (2160.1 mg) of TPS plant–1 was found from SN1B3 and the minimum (1001.8 mg) was in SN0B0. The maximum yield (172.81 kg) of TPS ha–1 was found from SN1B3 and the minimum (80.14 kg) was in SN0B0. The maximum weight (86.87 mg) of 100-TPS was found from SN3B3; whereas, the minimum (53.36 mg) was in SN0B0.

scholarly journals Variation in Reproductive Characteristics and Seed Production in the USDA Garlic Germplasm Collection

HortScience ◽  
2004 ◽  
Vol 39 (3) ◽  
pp. 485-488 ◽  
Author(s):  
Maria M. Jenderek ◽  
Richard M. Hannan
Keyword(s):  
Seed Production ◽  
Pollen Viability ◽  
Production Capacity ◽  
Morphological Characteristics ◽  
Germplasm Collection ◽  
Central Valley ◽  
Reproductive Characteristics ◽  
Germplasm Collections ◽  
True Seed ◽  
Flower Stem

Diverse garlic germplasm has proven to be essential for production of true seed. Yet, fertile accessions in garlic germplasm collections have not been characterized for breeders and researchers, and information on morphological characteristics associated with seed producing plants is very limited. The objective of this study was to evaluate reproductive characteristics and true seed production capacity in the USDA garlic germplasm collection. Most stable traits, such as flower stem appearance, opening ability of spathe, level of difficulty to remove bulbils, tepal color, umbel shape, and the number of flowers per umbel, were similar across populations evaluated. Other characteristics including position of stigma, tepal closure, pollen viability, time of flowering, scape senescence rate, and number of seeds produced by individual plants varied within accession evaluated. Of 47 accessions, 19 produced true seeds (from 48.5 to 1.5 seeds per plant) in the Central Valley of California. Seed production in the germplasm evaluated is adequate to initiate garlic breeding projects.

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