scholarly journals Compatibility Studies in Exotic and Indigenous Almond Varieties/Selections under Temperate Conditions of Kashmir Valley

2020 ◽  
pp. 123-130
Author(s):  
Shabeena Majid ◽  
Amit Kumar ◽  
Asima Amin ◽  
Zahida Rashid ◽  
Seerat -Ul-Nisa ◽  
...  
Keyword(s):  
Fruit Set ◽  
First Year ◽  
Open Pollination ◽  
Pollen Transfer ◽  
Compatibility Studies ◽  
Kashmir Valley ◽  
Cross Combination ◽  
Bloom Period ◽  
Cross Compatibility ◽  
Second Year

Almond is a self–incompatible plant and incompatibility are of the gametophytic type requiring pollen transfer between trees of different cultivars for fruit set. The present investigation was carried out for two consecutive years to evaluate cross-compatibility among selected varieties (three exotic) and selections (six indigenous) of a given segment of almond germplasm. Effective bloom period in the genotypes ranged between 8th March to 18th March and 7th March to 19th March in Mukhdoom, Shalimar, KD-03, KD-05, KD-06 and 23rd March to 31st March and 24th March to 2nd April in Pranyaj, Merced, Primorskij and Waris. Fruit set varied with each cross combination, initial fruit-set ranged from 5.55 per cent in Shalimar x KD-03 to 77.77 per cent in Waris x Shalimar in the first year and varied from 11.11 per cent in Merced x Shalimar to 85.71 per cent in Waris x KD-06 in second year. The highest final fruit set of 58.00 per cent was obtained in Merced x KD-05 as compared to lowest fruit set of 1.01 per cent recorded in Shalimar x KD-03 in the first year whereas the final fruit set ranged between 3.23 per cent to 66.00 per cent in Merced x Shalimar and Waris x KD-06 during the second year. Fruit set under open pollination varied from 9.00 to 60.00 per cent among different varieties/selections. No fruit set was observed in any genotype following selfing by bagging. Overall it is observed that the early blooming selections viz. Shalimar, KD-03, KD-05 and KD-06 exhibits maximum compatibility with most of the exotic and indigenous varieties/selections and obtained higher fruit set. 

scholarly journals Cross-compatibility of five highbush blueberry varieties and ideal crossing combinations

2019 ◽  
Author(s):  
Keanu Martin ◽  
Corneile Minnaar ◽  
Marinus de Jager ◽  
Bruce Anderson
Keyword(s):  
South Africa ◽  
Fruit Set ◽  
Developmental Time ◽  
Highbush Blueberry ◽  
Agricultural Crops ◽  
Compatibility Studies ◽  
Negative Effects ◽  
Pollen Donor ◽  
Cross Compatibility ◽  
Fruit Mass

AbstractBlueberry plants require large quantities of pollen deposited on stigmas to produce commercial-quality fruit. Like many agricultural crops, the interaction between pollen-source variety and pollen-recipient variety can be a major determinant of fruit quality in blueberries. However, little information exists to guide growers in optimising fruit set and quality. Using five commonly grown blueberry varieties, I determined whether crossing between varieties (inter-varietal) increased fruit mass and decreased developmental time relative to crossing within a variety (intra-varietal), and if so, what the best crossing combinations are. While intra-varietal pollination often produced fruit, for certain varieties the fruit set and fruit mass were highly reduced compared to inter-varietal pollination. Furthermore, intra-varietal pollination resulted in longer fruit developmental time in comparison to pollination between varieties. For the same pollen-recipient variety, inter-varietal crosses typically outperformed intra-varietal crosses in fruit mass and developmental time; however, the extent to which inter-varietal crosses outperformed intra-varietal crosses differed between pollen-donor varieties. This result suggests that combinations of varieties are not trivial as some inter-varietal combinations may outperform others. Furthermore, some varieties appear to be more susceptible to the negative effects of intra-varietal crosses than others and that less susceptible varieties may be better suited to conditions where pollinator movement is poor. While our study can guide growers in determining optimal co-planting schemes for the varieties tested, for example in South Africa where these varieties are frequently grown. It also serves as a blueprint for similar compatibility studies that can easily be performed prior to planting to determine the best inter-varietal combinations.

scholarly journals Blooming phenology and fertility of sour cherry cultivars selected in Hungary

2002 ◽  
Vol 8 (2) ◽  
Author(s):  
J. Nyéki ◽  
T. Szabó ◽  
Z. Szabó
Keyword(s):  
Fruit Set ◽  
Sour Cherry ◽  
Flowering Phenology ◽  
The Self ◽  
Open Pollination ◽  
Bee Pollination ◽  
Bloom Period ◽  
Self Pollination ◽  
Pollination Methods ◽  
Blooming Phenology

Experiments were conducted during the period between 1972 and 2002 at three sites in Hungary. At Érd 97, Helvetia 10, and Újfehértó, 3 cultivars were studied in variety collections. Observations were made on the blooming phenology (start, main time, end and length of the bloom period), on the blooming dynamics (the rate of the open flowers counted every day), on the receptivity of sexual organs, on the fruit set following self- and open-pollination and on the effect of association of varieties in the orchards (choice, rate and placement of pollinisers). Based on the results the rate of the overlap of the blooming times were calculated and varieties were assigned into five bloom time groups according to their main bloom. Self-fertility conditioned by natural self pollination was studied and good pollinisers were chosen (sweet, sour and duke cherry varieties) for the self-sterile and partially self-fertile varieties. The necessity of bee pollination was proved by different pollination methods: natural self-pollination, artificial self-pollination, open pollination. Summary: Experiments were conducted during the period between 1972 and 2002 at three sites in Hungary. At Érd 97, Helvetia 10, and Újfehértó, 3 cultivars were studied in variety collections. Observations were made on the flowering phenology (start, main time, end and length of the bloom period), on the flowering dynamics (the rate of the open flowers counted every day), on the receptivity of sexual organs, on the fruit set following self- and open-pollination and on the effect of association of varieties in the orchards (choice, rate and placement of pollinisers).

scholarly journals Initial and final fruit set in some plum (Prunus domestica L.) hybrids under different pollination types

Genetika ◽  
2012 ◽  
Vol 44 (3) ◽  
pp. 583-593 ◽  
Author(s):  
Ivana Glisic ◽  
Radosav Cerovic ◽  
Nebojsa Milosevic ◽  
Milena Djordjevic ◽  
Sanja Radicevic
Keyword(s):  
Pollen Germination ◽  
Fruit Set ◽  
Open Pollination ◽  
Prunus Domestica ◽  
In Vitro Pollen Germination ◽  
Self Pollination ◽  
Second Year ◽  
Research Institute

The paper presents results of two-year study (2009-2010) of initial and final fruit set in promising plum (Prunus domestica L.) hybrids developed at Fruit Research Institute - Cacak, under different pollination conditions. The following hybrids were studied: 38/62/70 (?Hall? x ?California Blue?), 32/21/87 (?Stanley? x ?Scoldus?), IV/63/81 (?Large Sugar Prune? x ?Scoldus?), 22/17/87 (?Cacanska Najbolja? x ?Zh'lta Butilcovidna?), 29/29/87 (?Stanley? x ?Scoldus?) and 34/41/87 (?Valjevka? x ?Cacanska Lepotica?). Each of the hybrids was studied both under self- pollination and open pollination. In vitro pollen germination was also performed as well as characteristics of flowering phenophase and flowering abundance. Generally, the results suggest lower flowering abundance in the second year of the study. Pollen germination ranged from averagely 25.31% (29/29/87) to 40.01% (38/62/70). With averagely 31.59% final fruit set under self-pollination and 29.38% under open pollination variants, respectively, hybrid 34/41/87 gave the best results. The lowest performance was observed in hybrid 32/21/87 with 1.61% and 7.69% final fruit set under self- and open pollination variants, respectively.

scholarly journals Inheritance of plant height and spike length in wheat

Genetika ◽  
2005 ◽  
Vol 37 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Biljana Gorjanovic ◽  
Marija Kraljevic-Balalic
Keyword(s):  
Plant Height ◽  
Combining Ability ◽  
Spike Length ◽  
First Year ◽  
Cross Combination ◽  
Gene Effects ◽  
Genetic Components ◽  
Additive Gene ◽  
Second Year ◽  
Mode Of Inheritance

Using the line x tester analysis (Sing and Choudhary, 1979), we studied the combining ability, gene effects and mode of inheritance of plant height and spike length, using 5 females, 3 testers and 15 F] hybrids of wheat. The mode of inheritance of characters under study depended on the cross combination and the year of growing. In most cases the mode of inheritance was dominant. Estimation of the genetic components of variation as well as ratio of GCA/SCA showed that plant height in the first year and spike length in the second year of research were predominantly controlled by additive gene action. Non-additive gene effects have been found to be more important than additive ones in the inheritance of plant height in the second year and spike length in the first year of research. The estimates of general combining ability (GCA) pointed out that the best general combiner for the plant height in the first year was line NS 31/96, while in the second year the best combiner was variety Fundulea 490. For the spike length the best general combiner in the both years was line NS 31/96. The line NS 31/96 was the best general combiner in this research and it can be used in wheat breeding.

scholarly journals Genetic analysis for grain weight per spike and harvest index in macaroni wheat

Genetika ◽  
2004 ◽  
Vol 36 (1) ◽  
pp. 23-29
Author(s):  
Biljana Gorjanovic ◽  
Marija Kraljevic-Balalic
Keyword(s):  
Combining Ability ◽  
Harvest Index ◽  
General Combining Ability ◽  
Grain Weight ◽  
First Year ◽  
Cross Combination ◽  
Gene Effects ◽  
Second Year ◽  
Mode Of Inheritance ◽  
Additive Genes

Using the line x tester analysis (Sing and Choudhary, 1979), we studied the combining ability, gene effects and mode of inheritance of grain weight per spike and harvest index, using 5 females, 3 testers and 15 hybrids of durum wheat. The results of the study show that non-additive genes play the more important role than additive in the inheritance of grain weight per spike and harvest index. The mode of inheritance of characters under study depended on the cross combination and the year of growing. In most cases the mode of inheritance was dominant. The estimates of general combining ability (GCA) pointed out that none of the genotypes in the first year of research had the significant GCA for grain weight per spike, while in the second year the best combiner was Kunduru. For the harvest index the best general combiner, in the first year, was Monodur, while in the second year the best combiner was Mexicali 75. In majority of the cases positive specific combining ability (SCA) effect were usually associated with crosses of two genetically divergent parents having at least one parent as a good general combiner.

scholarly journals Self-fertility studies of some sweet cherry (Prunus avium L.) cultivars and selections

2004 ◽  
Vol 10 (4) ◽  
Author(s):  
Zs. Békefi
Keyword(s):  
Significant Relationship ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Fruit Set ◽  
The Other ◽  
Open Pollination ◽  
Pollen Transfer ◽  
Self Pollination ◽  
Sweet Cherry Cultivars ◽  
Prunus Avium L

Fruit set of two sweet cherry cultivars (Alex' and 'Stella' ) and four Hungarian selections have been studied over two years following open pollination, unassisted self-pollination (autogamy) and artificial self-pollination (geitonogamy). Among accessions 'IV-6/240' proved to be self-sterile, while the other five revealed to be self-fertile. Significant differences have been found in fruit set among years and among pollination treatments but not among self-fertile accessions. Fruit set following unassisted self-pollination was significantly lower than of other pollination treatments. Thus pollen transfer is essential for profitable yield in sweet cherry growing. There was no significant relationship in the fruit set of open- and self-pollination.

An inevitable crisis? From first to second year in counsellor training

2020 ◽  
Vol 5 (1) ◽  
pp. 74-89
Author(s):  
Hugh Crago
Keyword(s):  
Right Hemisphere ◽  
Training Programme ◽  
First Year ◽  
Training Experience ◽  
Counsellor Training ◽  
Student Dropout ◽  
Second Year ◽  
Neurological Research ◽  
First Year Of Life ◽  
And Control

In a seminal 1973 paper, Robert Clark described the very different “cultures” of the first and second year students in a four year clinical psychology PhD programme. The author applies Clark’s template to his own experiences as trainee or trainer in five different counsellor education programmes, one in the US and four in Australia. Each of the programmes, to varying degrees, demonstrates key features of the pattern identified by Clark, where the first year is “therapeutic” and other-oriented, the second is “professional” and self-focused. The author concludes that all the surveyed programmes exhibited some level of “second year crisis”, in which a significant number of students felt abandoned, dissatisfied, or rebellious. The author extends and refines Clark’s developmental analogy (first year = childhood; second year = adolescence) to reflect recent neurological research, in particular, the shift from a right hemisphere-dominant first year of life, prioritising affiliative needs, to a left hemisphere-dominant second year, prioritising autonomy and control. This shift is paralleled later by a more gradual move from a protective, supportive childhood to necessary, but sometimes conflictual, individuation in adolescence. The first two years of a counsellor training programme broadly echo this process, a process exacerbated by the second year internship/placement, in which students must “leave home” and adjust to unfamiliar, potentially less nurturing, authority figures. Finally, the author suggests introducing more rigorous “academic holding” into the first year, and greater attention to “therapeutic holding” of dissident students in the second, hopefully decreasing student dropout, and achieving a better balanced training experience.

Implementation of the Second-year course in an Engineering Professional Spine

2018 ◽  
Author(s):  
Umar Iqbal ◽  
Deena Salem ◽  
David Strong
Keyword(s):  
Learning Outcomes ◽  
Research University ◽  
Engineering Students ◽  
Employability Skills ◽  
First Year ◽  
Computer Engineering ◽  
Core Courses ◽  
Second Year ◽  
First Time ◽  
Academic Year

The objective of this paper is to document the experience of developing and implementing a second-year course in an engineering professional spine that was developed in a first-tier research university and relies on project-based core courses. The main objective of this spine is to develop the students’ cognitive and employability skills that will allow them to stand out from the crowd of other engineering graduates.The spine was developed and delivered for the first time in the academic year 2010-2011 for first-year general engineering students. In the year 2011-2012, those students joined different programs, and accordingly the second-year course was tailored to align with the different programs’ learning outcomes. This paper discusses the development and implementation of the course in the Electrical and Computer Engineering (ECE) department.

Exploring the Implementation of Early Math Assessments in Kindergarten Classrooms: A Research-Practice Collaboration

2020 ◽  
Author(s):  
Jennifer McDonald ◽  
Rebecca Merkley ◽  
Jacqueline Mickle ◽  
Lisa Collimore ◽  
Daniel Ansari
Keyword(s):  
Mathematical Thinking ◽  
Math Education ◽  
Kindergarten Students ◽  
First Year ◽  
Research Practice ◽  
Early Numeracy ◽  
Future Directions ◽  
Collaborative Project ◽  
Practice Gap ◽  
Second Year

Research in cognitive development has highlighted that early numeracy skills are associated with later math achievement, suggesting that these skills should be targeted in early math education. Here we tested whether tools used by researchers to assess mathematical thinking could be useful in the classroom. This paper describes a collaborative project between cognitive scientists and school board researchers/educators implementing numeracy screeners with kindergarten students over the course of three school years. The Give-A-Number task (Wynn, 1990) was used with first-year kindergarten students and the Numeracy Screener [BLINDED] with second-year kindergarten students. Results indicated that educators (N = 59) found the tools feasible to implement and helpful for exploring their students’ thinking and targeting instruction. The Educators’ feedback also helped inform improvements to the implementation of the tools and future directions for both the schools and the researchers. This work emphasizes the importance of transdisciplinary collaboration to address the research-practice gap.

Influence of abiotic factors and hosts on seasonal dynamic of green lacewing, Chrysoperla carnea (Stephens)

2016 ◽  
Vol 3 (3) ◽  
Author(s):  
ARVIND KUMAR ◽  
POOJA KHULBE
Keyword(s):  
Abiotic Factors ◽  
Host Population ◽  
Maximum Temperature ◽  
First Year ◽  
Green Lacewing ◽  
Larval Population ◽  
Correlation Studies ◽  
Helianthus Annus ◽  
Sunflower Crop ◽  
Second Year

Influence of abiotic factors and hosts on population dynamics of green lacewing, Chrysoper lacarnea (Stephens) was studied in sunflower, Helianthus annus (Linn.).The maximum number of C. carnea population was found during mid March –mid April in the first year and mid April – mid May in the second year in sunflower crop. The maximum number of host population viz. egg and larva of Helicoverpa armigera and Myzuspe rsicae population were found during mid March –mid April in both the year and correlation studies revealed the positive and significant correlation between larval population of H. armigera, M. persicae and predator C. carnea. While there was no significant relationship found between eggs of H. armigera and C. carnea. The C. carnea population on H. annus during both the year was positively correlated with maximum temperature and found significant,while negatively correlated with relative humidity.However, no significant correlation of C. carnea was found with minimum temperature in both the year.

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