scholarly journals Features of biology and seminal productivity of biotypes of initial material of Psathyrostachys juncea (Russian wildrye) in Southern Middle Siberia

2020 ◽  
pp. 70-73
Author(s):  
V. F. Kadorkina ◽  
M. S. Shevtsova
Keyword(s):  
Initial Material ◽  
Psathyrostachys Juncea ◽  
State Commission ◽  
Fodder Crops ◽  
Phases Of Development ◽  
Russian Wildrye ◽  
K 12 ◽  
Methodological Guidelines ◽  
Application Programs ◽  
Selection Of

Relevance and methods. In the conditions of southern mid-Siberia, biological features and seed productivity of 26 biotypes of the nursery of the initial material of the Psathyrostachys juncea (Russian wildrye) of 2015 sowing are presented. The work was carried out in accordance with the methodological guidelines on the selection of fodder crops and the methodology of the State Commission for Crop Testing and Statistical Data Processing — using the package of application programs "Snedecor," and B.A. Dospehova (1985), in the Excel program.Results. Phenological observations made it possible to determine the period of passage of the phases of development of samples of the slice collector from sprouts to caking, exit into the tube and shingling. The greatest stability of uniform growth from the period of spring growth to colossal is observed in biotype — K 12. Quick-ripe biotypes K 1, K 4, K 5, K 9, K 12, K 16, K 24 period from the beginning of vegetation to seed ripening is 65–75 days. Biotypes K 1, K 3, K 5, K 12, K 18 are noted by number of productive stems, length of colos, weight of seeds from 1 plant.

scholarly journals Перспективная селекция баклажан для юга России

2019 ◽  
Author(s):  
N.V. Geraskina ◽  
V.V. Ognev
Keyword(s):  
Source Material ◽  
F1 Hybrids ◽  
Initial Material ◽  
Line Material ◽  
Selection Of

Представлены актуальные направления селекции баклажана для условий открытого и защищенного грунта. Выделен перспективный исходный материал для различных направлений использования. Дана характеристика перспективным образцам для использования в селекции. В качестве исходного материала для селекции целесообразно использовать сорта и гибриды F1 Эскимо, Халиф, Меч самурая Десерт Голиафа, Умка, Альбион и новый линейный материал Кит 53, Л 67, Л 83, 85/17, 94/16, Л 107.The perspective directions of selection of eggplant for conditions of open and protected soil are presented. The perspective source material for different directions of use is allocated. The characteristic of perspective samples for use in selection is given. As initial material for breeding it is advisable to use the obtained varieties and F1 hybrids Eskimo, Caliph, Sword of the samurai, Goliath Dessert, Umka, Albion, new line material Kit 53, L 67, L 83, 85/17, 94/16, L 107.

Cytological identification of some trisomics of Russian wildrye (Psathyrostachys juncea)

Genome ◽  
1995 ◽  
Vol 38 (6) ◽  
pp. 1271-1278 ◽  
Author(s):  
Jun-Zhi Wei ◽  
W. F. Campbell ◽  
G. J. Scoles ◽  
A. E. Slinkard ◽  
R. Ruey-Chyi Wang
Keyword(s):  
Crop Improvement ◽  
Diploid Species ◽  
Pollen Grains ◽  
Morphological Characters ◽  
Cereal Crop ◽  
Banding Patterns ◽  
C Banding ◽  
Psathyrostachys Juncea ◽  
Double Deletion ◽  
Russian Wildrye

Russian wildrye, Psathyrostachys juncea (Fisch.) Nevski (2n = 2x = 14; NsNs), is an important forage grass and a potential source of germplasm for cereal crop improvement. Because of genetic heterogeneity as a result of its self-incompatibility, it is difficult to identify trisomics of this diploid species based on morphological characters alone. Putative trisomies (2n = 2x + 1 = 15), derived from open pollination of a triploid plant by pollen grains of diploid plants, were characterized by Giemsa C-banding. Based on both karyotypic criteria and C-banding patterns, four of the seven possible primary trisomics, a double-deletion trisomic, and two tertiary trisomics were identified.Key words: Russian wildrye, Psathyrostachys juncea, trisomic, C-banding, karyotype.

The evaluation of economically important traits of promising genotypes of Russian wildrye (Psathyrostachys juncea (Fisch.)) in the south of Central Siberia

2021 ◽  
pp. 39-42
Author(s):  
В.Ф. Кадоркина ◽  
М.С. Шевцова
Keyword(s):  
Agricultural Research ◽  
Vegetative Reproduction ◽  
Dry Mass ◽  
Parent Material ◽  
Forage Yield ◽  
Yield Increase ◽  
Psathyrostachys Juncea ◽  
Russian Wildrye ◽  
The Republic ◽  
Green Mass Yield

Исследования проводились в сухостепной зоне Республики Хакасия в 2018–2020 годах с целью оценки и отбора перспективных селекционных образцов ломкоколосника ситникового по хозяйственно ценным признакам. Материалом исследований служили 16 образцов, высеянных семенами, и 8 сортообразцов вегетативного способа размножения, отобранных из питомника исходного материала 2015 года посева и в дальнейшем проанализированных в селекционных питомниках. В качестве стандарта взят сорт селекции Якутского НИИСХ Манчаары. В период вегетации проводились учёты и фенологические наблюдения за развитием растений. Работа проведена в соответствии с методическими указаниями по селекции кормовых культур. Исходя из биологических особенностей ломкоколосника ситникового, с целью увеличения урожайности семян для дальнейшей селекционной работы при вегетативном размножении их можно получить уже на второй год жизни. По основным показателям семенной продуктивности в селекционном питомнике вегетативного размножения отобраны образцы А 1, А 2, А 6 и А 12, также эти биотипы отмечены и по скороспелости: период от начала вегетации до созревания семян составил 88–94 дня. По кормовой продуктивности достоверная прибавка получена у А 1, А 2, А 6, А 10, А 12. В селекционном питомнике семенного размножения по основным показателям кормовой продуктивности выделены номера А 1, А 3, А 4.1, превышающие стандарт (сорт Манчаары) по продуктивности зелёной массы в 1,4–1,8 раза, по продуктивности сухой массы — в 1,2–1,6 раза. В этом питомнике образцы сформировали продуктивные стебли только на третий год жизни. The research was conducted in the dry steppe of the Republic of Khakassia in 2018–2020 to evaluate and select promising genotypes of Russian wildrye. The objects of this study were 16 genotypes grown from seeds and 8 genotypes of vegetative reproduction obtained from the nursery of parent material in 2015. Variety “Manchaary” from the Yakutian Agricultural Research Institute performed as the standard. Plant phenology was analyzed according to the recommended methods for forage crop breeding. To increase seed yield for plant breeding vegetative reproduction of Russian wildrye can be of great importance allowing seed production in the second year already. Genotypes A1, A2, A6, and A12 showed the highest seed productivity in the nursery of vegetative reproduction. They also were characterized by rapid maturation: the period from germination to maturation amounted to 88–94 days. A1, A2, A6, A10, and A12 had significant forage yield increase. Genotypes A1, A3, and A4.1 showed the best feed productivity in the nursery of seed reproduction. They exceeded the standard by 1.4–1.8 times in green mass yield and 1.2–1.6 times — in dry mass productivity. Genotypes formed productive stems only in the third year in the nursery.

scholarly journals The inhibitory action of transfer factors on lysis ofEscherichia coliK 12 by phages μ 2 and Φ 2

1970 ◽  
Vol 16 (2) ◽  
pp. 215-224 ◽  
Author(s):  
J. S. Pitton ◽  
E. S. Anderson
Keyword(s):  
Transfer Factors ◽  
Resistance Factors ◽  
Specific Phage ◽  
Agar Layer ◽  
K 12 ◽  
Female Specific ◽  
Male Specific ◽  
R Factors ◽  
Selection Of

SUMMARYA selection offi+resistance factors and transfer factors, when introduced into K 12F+, showed a range of inhibitory activity of lysis by the male-specific phage μ 2. This range can be used to subdivide thefi+factors intofi+1,fi+2,fi+3andfi+4classes, according to the degree of inhibition of μ 2 lysis. To this subdivision can be added restriction of the ‘female-specific’ phage φ 2.Introduction of all thefi+factors tested into K 12 HfrH totally inhibited lysis by μ 2 in spot tests, but with twofi+1and onefi+2factors visible lysis was obtained in agar-layer tests. These three factors caused least inhibition of transfer ofproby HfrH. It can be assumed that both tests reflect lower inhibition of sex fimbrial formation by thesefi+factors than by the remainder.Thefi−factors, when introduced into K 12, can be subdivided on the basis of restrictive effects on phage φ 2.These effects can be added to phage restriction in the salmonellae for the purposes of further classification of the transfer factors and R-factors.

EFFECT OF ROW SPACING ON BIOMASS PRODUCTION AND ABOVEGROUND HARVESTABILITY OF RUSSIAN WILDRYE

1990 ◽  
Vol 70 (2) ◽  
pp. 555-558 ◽  
Author(s):  
A.J. LEYSHON ◽  
H. CUTFORTH ◽  
J. WADOINGTON ◽  
P. C. RYMES
Keyword(s):  
Biomass Production ◽  
Dry Matter ◽  
Plant Morphology ◽  
Forage Yield ◽  
Row Spacing ◽  
The Third ◽  
Psathyrostachys Juncea ◽  
Russian Wildrye ◽  
Significant Yield

Russian wildrye (Psathyrostachys juncea [Fischer] Nevski) was grown in 15- and 60-cm row spacings at Swift Current, Saskatchewan. Beginning in the third year after establishment and continuing for 4 yr, dry matter yields taken by machine were compared to yields taken by hand in a two-cut system. The machine harvested 54% of the available dry matter in the 60-cm rows but only 27% in the 15-cm rows. Apart from one cut in 1 yr, there were no significant yield differences due to row spacing when the forage was harvested by hand. The results indicate the need for more research on the effects of row spacing, especially with regard to the grazing animal.Key words: Psathyrostachys juncea (Fischer) Nevski in Komarov, hand sampling, machine harvesting, plant morphology, forage yield

Target antigens in malaria transmission blockling immunity

1984 ◽  
Vol 307 (1131) ◽  
pp. 201-213 ◽  
Keyword(s):  
Malaria Transmission ◽  
Subsequent Development ◽  
Mosquito Population ◽  
Malaria Parasites ◽  
Transmission Blocking ◽  
Mosquito Midgut ◽  
Single Protein ◽  
Phases Of Development ◽  
Blocking Antibodies ◽  
Selection Of

Malaria transmission blocking immunity has been found to operate against two distinct phases of development of malaria parasites in the mosquito midgut: (i) against the extracellular gametes and newly fertilized zygotes shortly after ingestion by a mosquito of parasitized blood and (ii) against the zygotes during their subsequent development into ookinetes. Immunity is antibody-mediated and stage-specific. A set of three proteins, synthesized in the gametocytes, expressed on the surface of the gametes and newly fertilized zygotes and subsequently shed during later transformation of the zygotes, has been identified as the target antigens of anti-gamete fertilization blocking antibodies. A single protein, synthesized and expressed on the zygote surface during its development to ookinetes, has been identified as the target of antibodies which block the development of the fertilized parasites in the mosquito. Immunization of hum an populations against gamete or zygote antigens, while not directly protecting an immunized individual from inflection, would reduce the transfer of malaria within the population. Such immunity, in addition to reducing the overall rate of malaria transmission, would, if combined with a vaccine against the asexual (disease-causing) stages, reduce the chance of selection of parasites that are resistant to the asexual vaccine by preventing their entry into the mosquito population.

Short-lived intercrop forages affect long-term yields of alfalfa and wildrye grass mixtures

2002 ◽  
Vol 82 (1) ◽  
pp. 67-74
Author(s):  
A. J. Leyshon ◽  
P. G. Jefferson ◽  
J. Waddington
Keyword(s):  
Medicago Sativa ◽  
Avena Sativa ◽  
Forage Yield ◽  
Perennial Grasses ◽  
Forage Production ◽  
Elymus Trachycaulus ◽  
Psathyrostachys Juncea ◽  
Russian Wildrye ◽  
Slender Wheatgrass

Widely seeded rows (>60 cm) of perennial grasses have exhibited greater long-term yield stability, but allow weed invasion in the first years after establishment. A 9-yr study was conducted at a semiarid site at Swift Current, Saskatchewan, Canada, to determine the effects of intercropping oats (Avena sativa L.) and slender wheatgrass [Elymus trachycaulus (Link) Gould ex Shinners] between rows of Russian wildrye [Psathyrostachys juncea (Fisch.) Nevski], and Altai wildrye [Leymus angustus (Trin) Pilger] seeded in 90-cm spacings either alone or in alternate rows with alfalfa (Medicago sativa L.). Two rows of oats depressed grass forage production in the year following establishment. Slender wheatgrass intercrops reduced grass forage yield and alfalfa forage yield. However, slender wheatgrass contributed to increased total forage yields while it persisted in the mixture. By the fifth year, it had disappeared from the Russian wildrye plots but persisted 2 more years when intercropped with Altai wildrye. Interseeded companion crops, either annual or short-lived perennials, for forage will give short-term yield gains, but long-lived perennial forages may not recover from the competition in the long-term. Key words: Avena sativa, Elymus trachycaulus, Psathyrostachys juncea, Leymus angustus, Medicago sativa, forage yield

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