Evaluation of Bentazone Reaction by Growth Stage and Bentazone Dose Across Soybean Genotypes

A study to explore the agronomic response of some soybean genotypes to temporary flooding in the type-B overflow tidal swamp and to obtain the adaptive genotype to the environment was arranged in a split-plot design at coordinates 2°64’46.77” S and 104°75’27.75” E with an altitude of 3.5 m above sea level. The main plot was subject to short-term flooding with a variety of cultivation technologies consisting of saturated soil culture (SSC) for one month without flooding, SSC for one month with flooding, SSC during plant growth without flooding, SSC during plant growth with flooding and non-SSC/dry cultivation. The subplot was soybean genotype consisting of 6 genotypes: Tanggamus, Karasumame (Naihou), M652, Anjasmoro, M100-47-52-13, and Tachinagaha. The result showed that impaired soybean growth at the beginning of the growth stage caused pressure on the later growth stage and decreased soybean yield. Short-term flooding reduced the soybean yield. The non-tropical genotypes of Karasumamae (Naihou), M652 and Tachinagaha produced the lowest yield of seeds; 20% lower than the tropical genotypes of Anjasmoro, M100-47-52-13 and Tanggamus with SSC during plant growth without flooding treatment. The Karasumame (Naihou) genotype produced the highest seed yield of the three non-tropical genotypes. Anjasmoro and M100-47-52-13 produced the highest seed yield at temporary flooding.

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Evaluation of Selected Soybean Genotypes for Resistance to Two Whitefly Species (Homoptera: Aleyrodidae) in the Greenhouse

Journal of Entomological Science ◽

10.18474/0749-8004-30.4.519 ◽

1995 ◽

Vol 30 (4) ◽

pp. 519-526 ◽

Cited By ~ 5

Author(s):

A. L. Lambert ◽

R. M. McPherson ◽

B. Sparks

Keyword(s):

Growth Stage ◽

Trialeurodes Vaporariorum ◽

Leaf Damage ◽

Silverleaf Whitefly ◽

Bemisia Argentifolii ◽

Greenhouse Whitefly ◽

Breeding Lines ◽

Varietal Response ◽

Soybean Genotypes ◽

Plant Injury

Fourteen soybean cultivars and breeding lines in Maturity Groups VII and VIII were monitored for silverleaf whitefly, Bemisia argentifolii Bellows and Perring, and greenhouse whitefly, Trialeurodes vaporariorum (Westwood), infestation levels in the greenhouse. Unifoliate leaves became infested with whitefly immatures and eggs 4 wks after planting. LA88-32 and F90-700 had significantly higher total whitefly populations than 11 and eight of the other entries, respectively, at growth stage V7. Whitefly populations were higher 6 wks after planting (growth stage V8–V9) when a unifoliate leaf and trifoliate leaves 1, 2, and 3 were sampled. G89-5180, Perrin, F90-988, G89-5066, N89-1, and N88-91 had significantly lower total numbers of whiteflies than F90-724, F90-700, and LA88-32. At 10 wks after planting (growth stage R2), G89-5180 and N88-91 had the lowest numbers of whiteflies, and total counts were significantly higher for F90-724 on trifoliolates 2, 4, and 6. Leaf damage ratings (% leaf burn) ranged from 1.3% (F90-724) to 74.0% (F90-1054). Sampling ceased after 10 wks because of excessive whitefly-induced plant injury to most soybean entries. This study reflected significant differences in soybean varietal response to whitefly population densities and demonstrated that the greenhouse can be used effectively to screen soybeans for resistance to whiteflies.

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Observations oh Nucleation and Growth of Voids in Nickel

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100069065 ◽

1970 ◽

Vol 28 ◽

pp. 414-415

Author(s):

J. L. Brimhall ◽

H. E. Kissinger ◽

B. Mastel

Keyword(s):

High Purity ◽

Growth Stage ◽

Elevated Temperatures ◽

Early Growth ◽

Nucleation And Growth ◽

Pure Nickel ◽

Different Temperatures ◽

Total Fluence ◽

Neutron Exposure ◽

Growth Of Voids

Some information on the size and density of voids that develop in several high purity metals and alloys during irradiation with neutrons at elevated temperatures has been reported as a function of irradiation parameters. An area of particular interest is the nucleation and early growth stage of voids. It is the purpose of this paper to describe the microstructure in high purity nickel after irradiation to a very low but constant neutron exposure at three different temperatures.Annealed specimens of 99-997% pure nickel in the form of foils 75μ thick were irradiated in a capsule to a total fluence of 2.2 × 1019 n/cm2 (E > 1.0 MeV). The capsule consisted of three temperature zones maintained by heaters and monitored by thermocouples at 350, 400, and 450°C, respectively. The temperature was automatically dropped to 60°C while the reactor was down.

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Responses of soybean genotypes to intercropping with maize in the Southern Guinea Savanna, Nigeria

Acta Agronomica Hungarica ◽

10.1556/aagr.52.2004.2.6 ◽

2004 ◽

Vol 52 (2) ◽

pp. 157-163

Author(s):

C. U. Egbo ◽

M. A. Adagba ◽

D. K. Adedzwa

Keyword(s):

Seed Yield ◽

Block Design ◽

Field Trials ◽

Yield Response ◽

Ecological Zone ◽

Land Equivalent Ratio ◽

Guinea Savanna ◽

Days To Maturity ◽

Soybean Genotypes ◽

Location Interaction

Field trials were conducted in the wet seasons of 1997 and 1998 at Makurdi, Otukpo and Yandev in the Southern Guinea Savanna ecological zone of Nigeria to study the responses of ten soybean genotypes to intercropping. The experiment was laid out in a randomised complete block design. The genotypes TGX 1807-19F, NCRI-Soy2, Cameroon Late and TGX 1485-1D had the highest grain yield. All the Land Equivalent Ratio (LER) values were higher than unity, indicating that there is great advantage in intercropping maize with soybean. The yield of soybean was positively correlated with the days to 50% flowering, days to maturity, plant height, pods/plant and leaf area, indicating that an improvement in any of these traits will be reflected in an increase in seed yield. There was a significant genotype × yield × location interaction for all traits. This suggests that none of these factors acted independently. Similarly, the genotype × location interaction was more important than the genotype × year interaction for seed yield, indicating that the yield response of the ten soybean genotypes varied across locations rather than across years. Therefore, using more testing sites for evaluation may be more important than the number of years.

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Resistance of soybean genotypes toAphis glycines (Hemiptera: Aphididae)

10.1603/ice.2016.114394 ◽

2016 ◽

Author(s):

Flávio Gonçalves Jesus

Keyword(s):

Soybean Genotypes

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Antixenosis of soybean genotypes toDichelops melacanthus(Hemiptera: Pentatomidae)

10.1603/ice.2016.115048 ◽

2016 ◽

Author(s):

Vinícius Fernandes Canassa

Keyword(s):

Soybean Genotypes

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SOYBEAN AND FLAX SELECTION METHODS

Vestnik of the Russian agricultural science ◽

10.30850/vrsn/2019/2/19-23 ◽

1970 ◽

pp. 19-23

Author(s):

V. М. Lukomets ◽

S. V. Zelentsov

Keyword(s):

High Resistance ◽

Fungal Pathogens ◽

Selection Process ◽

Pathogenic Fungi ◽

Cultivated Plants ◽

Practical Implementation ◽

Physiological Basis ◽

Oil Crops ◽

Soybean Genotypes ◽

Genetically Determined

To improve the effectiveness of the soybeans and oil flax breeding, research to improve existing and develop new breeding methods are conducting in all-Russia Research institute of Oil Crops (Krasnodar). One of the improved methods for the soybean breeding, based on the use of sources of complexes of compensatory genes, is the CCG technology, which allows to create varieties with an increased yield of a heterotic level transmitted along the progeny for the entire life cycle of the variety. For the purpose of non-transgenic production of new traits, a theory of polyploid recombination of the genome (TPR) was formulated, which models the mechanism of the natural formation of polymorphism in the centers of origin of cultivated plants. On the basis of this theory, a method of breeding (TPR-technology) has been developed, which makes it possible to obtain recombinant reploids of soybeans and oil flax with an extended spectrum of traits. Of these reploids, the soybean lines with increased sucking force of the roots, providing high drought resistance, were distinguished; cold-resistant soybean lines, which stand in the phase of shoots of freezing to minus 5 °С; lines of oil flax with complete resistance to flax sickness of soil and high resistance to Fusarium; winter-hardy flax lines that withstand winter frosts down to minus 20–23 °С and ripen one and a half months earlier than spring sowings. Another original developed method is the ODCS-technology for isolating and selecting soybean genotypes with high resistance to fungal pathogens. The physiological basis of ODCS-technology is the blocking of osmotic nutrition of pathogenic fungi due to genetically determined increased osmotic pressure in the tissues of host plants. The practical implementation of CCG-, TPR- and ODKS-technologies in the selection process, allowed to create a whole series of soybean and oil flax varieties with improved or new traits.

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Identification of novel haplotype of a cyst nematode resistance gene, GmSNAP18 in soybean [Glycine max (L.) Merr.]

Indian Journal of Genetics and Plant Breeding (The) ◽

10.31742/ijgpb.80.3.5 ◽

2020 ◽

Vol 80 (03) ◽

Author(s):

Ik-Young Choi ◽

Prakash Basnet ◽

Hana Yoo ◽

Neha Samir Roy ◽

Rahul Vasudeo Ramekar ◽

...

Keyword(s):

Soybean Cyst Nematode ◽

Gene Families ◽

Nematode Resistance ◽

Cyst Nematode ◽

Soybean Breeding ◽

Resistant Varieties ◽

Soybean Genotypes ◽

Glycine Max L ◽

Scn Resistance

Soybean cyst nematode (SCN) is one of the most damaging pest of soybean. Discovery and characterization of the genes involved in SCN resistance are important in soybean breeding. Soluble NSF attachment protein (SNAP) genes are related to SCN resistance in soybean. SNAP genes include five gene families, and 2 haplotypes of exons 6 and 9 of SNAP18 are considered resistant to the SCN. In present study the haplotypes of GmSNAP18 were surveyed and chacterized in a total of 60 diverse soybean genotypes including Korean cultivars, landraces, and wild-types. The target region of exons 6 and 9 in GmSNAP18 region was amplified and sequenced to examine nucleotide variation. Characterization of 5 haplotypes identified in present study for the GmSNAP18 gene revealed two haplotypes as resistant, 1 as susceptible and two as novel. A total of twelve genotypes showed resistant haplotypes, and 45 cultivars were found susceptible. Interestingly, the two novel haplotypes were present in 3 soybean lines. The information provided here about the haplotypic variation of GmSNAP18 gene can be further explored for soybean breeding to develop resistant varieties.

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