scholarly journals Flowering in Pisum: Evidence that Gene Sn Controls a Graft-Transmissible Inhibitor

1973 ◽  
Vol 26 (3) ◽  
pp. 675 ◽  
Author(s):  
IC Murfet ◽  
JB Reid
Keyword(s):  
Early Variety ◽  
Late Variety

Under an 8-hr photoperiod scions of an early pea variety of genotype if e sn hr grafted to stocks (with cotyledons) of a late variety of genotype if e Sn hr flowered several nodes later than either intact, decotyledonized, or self-grafted plants of the early variety.

scholarly journals Physico-morphological variation in hyacinth bean [Lablab purpureus (L.) Sweet]

1970 ◽  
Vol 35 (3) ◽  
pp. 431-438 ◽  
Author(s):  
MS Islam ◽  
MM Rahman ◽  
T Hossain
Keyword(s):  
Seed Weight ◽  
Lablab Purpureus ◽  
Early Variety ◽  
Leaf Petiole ◽  
Qualitative And Quantitative ◽  
Green Seed ◽  
Pod Yield ◽  
Quantitative Characters ◽  
Physical Traits ◽  
Hyacinth Bean

Forty-four hyacinth bean genotypes were evaluated for different qualitative and quantitative characters during July 2005 to February 2006 at Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur. The genotypes showed considerable variations for most of the morpho-physical traits. Shape, size and colour of vein, leaf, petiole, stem, flower, pod and seed varied among the genotypes. Days to first flower ranged from 47.6 to 136.3 days indicating the presence of early variety. Individual pod weight varied from 1.47 (HB042) to 12.3g (HB009). The genotype HB027 produced the maximum number of pods/ plant (425) closely followed by HB001 (385). Similar trend was observed for pod yield/plant. The genotype HB027 produced the highest pod yield/plant (3.45kg) followed by HB001 (3.35kg). 100-green seed weight ranged from 4.0g to 73.33g, which indicated the presence of bold seeded genotypes. Among the genotypes, HB027 and HB007 produced very bold green seed and higher green pod yield/plant, therefore, they can be selected for both pod and green seed production purpose. Keywords: Physico-morphological; hyacinth bean DOI: 10.3329/bjar.v35i3.6450Bangladesh J. Agril. Res. 35(3) : 431-438

scholarly journals Effects of Photoperiodism and Other Factors on the Improvement of Pigeonpea Varieties

1969 ◽  
Vol 48 (3) ◽  
pp. 232-235
Author(s):  
Arturo Riollano
Keyword(s):  
Day Treatment ◽  
Breeding Program ◽  
Flower Induction ◽  
Day Length ◽  
Flower Formation ◽  
Length Of Day ◽  
Short Day ◽  
Late Variety ◽  
Polyethylene Bags

Studies on the effects of photoperiodism and other factors were conducted to obtain information which might be useful in a breeding program with pigeonpeas. The information was sought for accelerating this work in a region where extremes of day-length vary by only 2 hours because of its location in latitude 18°. By shortening the length of day to 8 hours through the use of a darkroom, and planting during the month of February, it was possible to induce flower formation 4 months earlier in two early varieties and 7 weeks earlier in a late variety. However, this short-day treatment did not appreciably affect the time of flower induction in an all-season, or "Totiempo" variety. One-gallon tin-can containers and 10-inch polyethylene bags were found satisfactory for growing pigeonpea plants of different varieties.

scholarly journals The growth of entrepreneurial human capital: origins and development of skill variety

2021 ◽  
Author(s):  
Alexander Krieger ◽  
Michael Stuetzer ◽  
Martin Obschonka ◽  
Katariina Salmela-Aro
Keyword(s):  
Human Capital ◽  
Structural Equation ◽  
Developmental Psychology ◽  
Entrepreneurial Intentions ◽  
Equation Modeling ◽  
Future Research ◽  
Early Variety ◽  
Prospective Longitudinal ◽  
Entrepreneurial Human Capital

AbstractGiven that recent research on entrepreneurial behavior and success has established skill variety as a central human capital factor, researchers, educators, and policymakers have turned their interest to a deeper understanding of the formation of skill variety. Based on human capital theory and the competence growth approach in developmental psychology (highlighting long-term, age-appropriate, and cumulative skill-growth processes), we hypothesize that a broad, early variety orientation in adolescence is a developmental precursor of such entrepreneurial human capital in adulthood. This was confirmed in an analysis of prospective longitudinal data via structural equation modeling and serial mediation tests. We also find that an entrepreneurial constellation of personality traits, but not entrepreneurial parents, predicts early variety orientation, skill variety, and entrepreneurial intentions. By shedding new light on the long-term formation of entrepreneurial human capital, the results suggest that establishing and benefiting from an early variety orientation is not only an important developmental mechanism in entrepreneurial careers but gives those with an entrepreneurial personality an early head start in their vocational entrepreneurial development. Implications for future research and practice are discussed.

Variation in maturity, stolon development and frost resistance of Glycine javanica

1966 ◽  
Vol 6 (23) ◽  
pp. 380 ◽  
Author(s):  
LA Edye ◽  
HJ Kiers
Keyword(s):  
Flowering Time ◽  
Frost Resistance ◽  
Seed Set ◽  
Flowering Period ◽  
Early Variety ◽  
South Eastern ◽  
Discontinuous Variation ◽  
Late Maturity ◽  
Maturity Type ◽  
Stolon Development

Introductions of G. javanica showed wide variation in flowering time, seed set, seed yield, stolon development, and frost resistance at Lawes in south-eastern Queensland. The discontinuous variation in flowering time of 50 introductions over 103 days at Lawes has enabled very early, early, midseason, and late maturity types to be defined. These maturity classes hold equally well when applied at 'Lansdown' in north Queensland. With the exception of C.P.I. 25336, only very early and early introductions set seed in large areas of south-eastern Queensland where frosts are experienced in June and July. C.P.I. 25336, an early variety with an extended flowering period, did not set seed before the first heavy frost on June 24, 1961. The association of maturity type, stolon development, and frost resistance with the country of origin of the introductions is mentioned and the significance of these characters in adapting G. javanica to Australian conditions is discussed.

scholarly journals Comparison of Late Blight Resistance and Yield of Potato Varieties

2013 ◽  
Vol 67 (3) ◽  
pp. 254-258
Author(s):  
Terje Tähtjärv ◽  
Aide Tsahkna ◽  
Sirje Tamm
Keyword(s):  
Late Blight ◽  
Organic Farming ◽  
Late Blight Resistance ◽  
Blight Resistance ◽  
Infection Level ◽  
New Variety ◽  
Early Variety ◽  
Potato Varieties ◽  
Effective Strategies ◽  
Plant Breeding Institute

Growing more resistant potato varieties is one of the most effective strategies to control late blight, to protect potato yield and to prevent harming the environment. The main aim of our study was to identify potato varieties with higher resistance to late blight and which were high yielding in Estonian conditions and suitable for organic farming. During the three-year trial, twelve potato varieties were tested at the Jõgeva Plant Breeding Institute (PBI) in 2010-2012. Foliage late blight (Phytophtora infestance (Mont) de Bary) and yield were estimated. First infection of late blight occurred in different times during the trial years. The three-year average infection level indicated that early varieties ‘Arielle’, ‘Impala’ and ‘Princess’ were more damaged than other varieties in the first estimation. Late varieties ‘Ando’, ‘Anti’, ‘Juku’ and ‘Sarme’ had higher late blight resistance. Their foliage damage remained less than 30% in the last estimation. The new medium variety ‘Teele’ had a lower infection rate than other medium varieties and did not significantly differ from late varieties. Based on these data, late varieties, early variety ‘Maret’ and medium variety ‘Teele’ can be considered suitable for organic farming. The new variety ‘Teele’ had the highest threeyear average tuber yield (52.8 t ha-1). Varieties ‘Impala’, ‘Princess’ and ‘Secura’ had significantly lower yield. Yield loss of these varieties might have been caused by higher late blight infection during trial years

The Onaway potato, an early variety

1961 ◽  
Vol 38 (10) ◽  
pp. 353-355 ◽  
Author(s):  
E. J. Wheeler ◽  
R. V. Akeley
Keyword(s):  
Early Variety

ANALYSIS OF MORTALITY IN THE APPLE MAGGOT, RHAGOLETIS POMONELLA (DIPTERA: TEPHRITIDAE), IN QUEBEC

1977 ◽  
Vol 109 (6) ◽  
pp. 769-788 ◽  
Author(s):  
P. J. Cameron ◽  
F. O. Morrison
Keyword(s):  
Emerging Adults ◽  
Larval Mortality ◽  
Experimental Studies ◽  
Pupal Stage ◽  
Life Tables ◽  
Population Variation ◽  
Key Factors ◽  
Early Variety ◽  
Successive Generations ◽  
Pupal Mortality

AbstractLife tables were constructed for populations of R. pomonella (Walsh) in two abandoned, heavily infested apple orchards near Como, Quebec. All life stages were sampled and the results expressed in terms of the apple as a unit. Twenty-five life tables, each based on one tree, covered two successive generations on both early and late maturing varieties.Natality was of no value in predicting variation in numbers of emerging adults, whereas the early pupal stage estimates explained over 80% of the variation. Parasitism of larvae and pupae was more common than previously recorded but parasites were not significant in the population dynamics of their host. Nutritionally based larval mortality, predation on mature larvae and pupae, and movements of adults between trees were key factors in population variation. Early variety trees appeared to maintain apple maggot population levels. These results were supported by experimental studies on the effects of temperature treatments and predation on larval and pupal mortality.

scholarly journals OPTIMIZATION OF STANDING DENSITY OF SOY PLANTS DEPENDING ON THE SORT’S MATURITY GROUP OF THE VARIETY FOR THE CONDITIONS OF THE NORTH-EASTERN PART OF THE FORESTSTEPPE OF UKRAINE

2020 ◽  
Vol 2 ◽  
pp. 23-25
Author(s):  
Z. I. Hlupak
Keyword(s):  
Climatic Conditions ◽  
Forest Steppe ◽  
Maturity Group ◽  
Early Variety ◽  
Soybean Yield ◽  
The North ◽  
North Eastern ◽  
Early Ripening ◽  
Favorable Conditions ◽  
North Eastern Part

The aim of the article is to establish the optimal sowing density of soybean plants depending on the maturity group of the variety to obtain consistently high yields. For this purpose, new varieties of soybeans Siverka, Medison and Sihaliia were taken for research, which differ not only in the duration of vegetation, but also in morphological characteristics. The object of the research is the process of forming soybean yield depending on the variety and standing density. The subject of the research is the varieties: early-ripening Siverka from the Institure of Agriculture of the National Academy of Agrarian Sciences of Ukraine (NAAS), year of registration - 2013, plant growth type - intermediate; middle-early Medison from Hyland seeds: it has been in the Register of the varieties of Ukraine from 2008; type of growth - indeterminate; middle-ripening Sihaliia fro Dunai Agro, which was brought in the Register of the varieties of Ukraine in 2014, type of growth - indeterminate; seeding rates of 600, 700 and 800 thousand per ha; soybean grain yield. The forerunner in the experiments was winter wheat. Soil preparation consisted of stubble peeling and fallow plowing. Before sowing cultivation with harrowing was conducted. Sowing was carried out at a time when the soil at thr depth of 10 cm warms up to 100C in the usual row manner with a row spacing of 15 cm to the depth of 4-5 cm. Crops care laid in carring out preemergence and two post-emergence harrowings. Studies have shown that soybean yields depended on the variety and density of plants. Thus, on average over the years of research, the yield in the variety Siverka varied from 2.01 t per ha at a density of 800 thousand pieces per ha and decreased as it thickened to 2.26 t per ha at a density of 600 thousand pieces per ha. In the Medison variety, the yield ranged from 2.18 t per ha at a density of 600 thousand units per ha to 2.41 t per ha at a density of 700 thousand units per ha. In the Sihaliia variety, the yield varied from 2.28 t per ha at a density of 600 thousand pieces per ha to 2.50 t per ha at a density of 800 thousand pieces per ha. The maximum yield for the years of research (2.09-2.39 t per ha) the variety of Siverka formed at a density of 600 thousand pieces per ha. In the Medison variety the highest yield (2.31-2.52 t per ha) was obtained at a standing density of 700 thousand pieces per ha. The yield of the Sihaliia variety depended to a greater extent on the weather and climatic conditions of the year. Thus, under drier conditions in 2017, the highest yield of the variety (2.44 t per ha) was formed at a density of 700 thousand pieces per ha. Under more favorable conditions, the highest yield was obtained at a density of 800 thousand pieces per ha - 2.51-2.69 t per ha. Depending on the weather and climatic conditions of the years of research, the highest yields of all varieties were obtained under favorable conditions in 2019 - 2.27-2.56 t per ha. Under drier and cooler conditions in 2017, the yield of all varieties was lower by 0.13-0.41 t per ha. Thus, in the conditions of the north-eastern part of the forest-steppe of Ukraine, in order to obtain a high soybean yield, it is necessary to take a differentiated approach to the choice of the optimal standing density depending on the maturity group of the variety. Optimal conditions for the formation of maximum productivity of early-ripening soybean variety Siverka were created in the agrophytocenosis at densities of 600 thousand per ha, for medium-early variety Medison - 700 thousand per ha, and for medium-ripening variety Sihaliia - 700-800 thousand pieces per ha.

scholarly journals Seed yield and seed quality of subterranean clover (Trifolium subterraneum L.) in growing conditions of Finland

1990 ◽  
Vol 62 (3) ◽  
pp. 221-226
Author(s):  
E. Varis ◽  
U. Peltola ◽  
R. Kauppila
Keyword(s):  
Seed Yield ◽  
Seed Quality ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Weather Conditions ◽  
Considerable Proportion ◽  
Early Variety ◽  
Growing Conditions ◽  
The University

Seed yield and overwintering of seeds of 22 Australian subterranean clover varieties were investigated in 1986 and 1987 at the Viikki Experimental Farm of the University of Helsinki. The seed yield varied remarkbly according to the variety and weather conditions of the two summers. Some varieties, such as Seaton Park, Woogenellup and Karridale, and during the summer of 1987 also the early variety Dalkeith, produced lots of seed. Some late varieties, e.g. Treeton, Tallarook and Esperance, produced very few seeds or no seeds at all. A considerable proportion of the seeds degenerated during the wet autumn conditions, by the end of October. Many seeds showed embryo dormancy, but complete dormancy or hard seeds were found only exeptionally. In spring 1988, some seedlings which had developed from overwintered burrs were found. There seems to be little hope of finding self-seeding subterranean clovers suitable for Finnish growing conditions.

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