1,721,156 research outputs found
(20(3):49-53)STUDIES ON THE SEED DORMANCY OF PEANUTS III. Inheritance of Seed Dormancy of Peanuts
No full text本研究之目的在分析落花生種子休眠性之遺傳情形，以供育種上之參考。以Spanish型之Java 2品種（無休眠性）分別與Virginia型之Virginia Bunch 67（長休眠性）、Chiba Bunch（中休眠性）及NC-1（短休眠性）正反交之F2單株及F3系統為材料，於1970年春作在臺北農試所及秋作在屏東大寮試驗地舉行，成熟收穫後14日測定F2單株及F3系統之種子休眠率，凡在20%以上者表示具有休眠性，由上項材料計算F2植株種子休眠性之分離比及F3系統種子休眠性之分離情形。
本試驗F2植株種子休眠性測定之結果，顯示無休眠性之Java 2與長休眠性之Virginia Bunch 67及中休眠性之Chiba Bunch兩雜交組合無論正交（JV、JC）及反交（VJ及VC)，其F2植株種子休眠性之分離比均為3休眠比1不休眠，同時由F3系統分離測定之結果，F2親本具休眠性者，其後裔F3系統有1/3之休眠性不分離，為顯性同型接合，其餘2/3有休眠與無休眠之分離。F2親本為無休眠者，其設裔F3系統全部均為無休眠性，可見落花生種子休眠性之性狀係受一對（D-d)遺傳因子之控制，休眠性為顯性，無休眠性為隱性，無休眠性之Java 2與短休眠性之NC-1正反交（JN、NJ）組合，其結果不符合3:1分離比率，可能由於親本之休眠性過於接近，引起F2植株種子休眠測定之誤差所致。
This report is the results of a study of the mode of inheritance of seed dormancy in peanuts. A Spanish type variety, Java 2, which is non-dormancy was crossed with Virginia Bunch 67 (Virginia type, long dormancy), Chiba Bunch (Virginia type, moderate seed dormancy), and NC-1 (Virginia, short seed dormancy) respectively. The reciprocal crosses were also made at the same time. The F2 populations, F3 families of all three crosses, and their reciprocals were analyzed. The F2 materials and their parents were planted in spring 19 at Taiwan Agricultrual Research Institute in Taipei, and the F3 families were planted in autumn the same year (in Pingtugn). The seed germination test for F2 plants and F3 families were conducted by using the seeds 14 days after harvest. The percenfage of dormancy of any plant higher than 20% was considered as a dormant plant. The results indicated that the cross combinations, Java 2 x Virginia Bunch 67 and Java 2 x Chiba Bunch and their reciprocals showed 3 dormant: 1 non-dormant segregating ratio. (Table 1). The F3 families showed that one-third of the families derived from dormant F2 plants are homozygote for seed dormancy while the other two-thirds are segregating. The non-dormant F2 plants resulted in all non-dormant F3 families (Table 2). However, in the cross-combination of Jave 2 x NC-I and its reciprocal, the F2 segregating ratio did not agree with a 3:1 ratio, but the F3 families did agree with a 1:2:1 ratio. So it is concluded that the seed dormancy may be controlled by a single dominant gene. designated as D. The F2 population of Jave x NC-1 deviated from 3:1 ratio might be explained at that the dormancy period of Java 2 and NC.I was quite close which makes the classification more difficult
(20(3):42-48)STUDIES ON THE SEED DORMANCY OF PEANUTS II. The Effect of Seed Maturity on Dormancy and Sprouting of Peanuts
No full text本試驗以三種不同類型品種：臺農3號（SPanish）、立枝仔（Virginia Bunch）、澎湖2號(Virgiula Runner）為材料，於59年3月25日播種。根據各品種之始花日期，在始花後60日、75日、90日、105日、120日及135日等6次，分別收穫。採用要區設計，重復3次，每次收穫時調查其莢果產量、成熱莢比率、剝實率及飽滿粒比率，同時調查收穫時在他中萌芽莢之比率，收護乾燥後每隔一週舉行發芽試驗，調查休眠種子比率。根據三個代表品種在不同收穫期之莢果種子性狀，作為判定各品種之種子成熟度及其休眠性，地中萌芽之關係。玆將結果摘述如下：
(一) 落花生不同類型品種之成熟期有顯著差異，根據不同收穫期之莢果收量，成熟莢比率，剝實率及飽滿粒比率等性狀之差異顯著性，表示臺農3號之成熟期在始花後90日，立枝仔及澎湖2號，則在始花後120日始達成熱階段，在成熟前收穫之莢果臺量、成熟莢比率、剝實率及飽滿粒比率均顯著降低。
（二）各品種不同收穫期之地中萌芽調查結果，顯示無休眠性之臺農3號地中萌芽玲休眠性之立枝仔及澎湖2號為嚴重，且隨著生育日數之延長而增加，達到成熟以後增加更為急劇。
（三）從不同收穫期收穫之成熟度不同的種子進行種子休眠性的測定結果，認為臺農3號因無休眠性，其種子在未成熟（始花後60日）時，亦能全部發芽；而立枝仔及澎湖2號在未達成熟階段的種子（始花後120日以前收穫者），較達到成熟階段的種子（始花後120日及135日收穫者）之休眠性為強，而休眠期亦較長。
This paper is to report the effect of seed maturity on seed dormancy and sprouting of peanuts. The experiment was conducted in the spring, 1970 at Plant and Seed Propagation Station, Taichung, Taiwan. Three varieties, Tainung No.3 (Spanish, early-maturity), Li-chi-tzu (Virginia bunch, Mibble-maturity) anb Peng-hu No. 2 (Virginia Runner, late maturity) were used in this study along with 6 different dates of harvest at intervals of 15 days beginning from 60 days to 135 days after flowering. The seed dormancy and sprouting percentage of different seed maturity (different dates of harvest) were evaluated, The results were summarized as follows:
1) Judging from the data obtained in the yield of pods, percent maturing pod, percent sound and shelling percentage, it is indicated that days to harvest after flowering or degree maturity varied among different varieties, the Peng-hu No.2 and Li-shih-tzu had higher yield and quality at 120 days after flowering, but the Tainung No. 3 required only 90 days. The yield and quality differences were also very significant among different dates of harvest.
2) The percentage of preharvest sprouting was higher for variety Tainung No.3 than Peng-hu No.2 and Li-chih-tzu. It was also found that the sprouting percentage increased steadily after peanuts reached maturing stage, especially Tainung No.3.
3) The experimental results showed that the seed of Tainung No.3 could germinate immediately after harvest at the stage of 60 days after flowering. However the seeds of Peng-hu No.2 and Li-chih-tzu required 6-8 weeks dormancy period when they were harvested less than 120 days after flowering which was considered to be not completely mature. Period was little shorter as the seeds approached maturity
Studies on the Yield Components of Peanut II. The Path Coefficient of Yield Components in Different Crops of Peanut
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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