1,728,957 research outputs found

    Longiantennum Liang, Li & Yao 2022

    No full text
    Genus <i>Longiantennum</i> Liang, Li & Yao, 2022 Type species. <i>Longiantennum fashengi</i> Liang, Li & Yao, 2022Published as part of <i>Hakim, Marina, Azar, Dany & Huang, Di-Ying, 2023, First record of fossil psocodeans in copula from mid-Cretaceous Burmese amber, pp. 74-93 in Zootaxa 5396 (1)</i> on page 84, DOI: 10.11646/zootaxa.5396.1.13, <a href="http://zenodo.org/record/10441322">http://zenodo.org/record/10441322</a&gt

    Sastra Peranakan Tionghoa dan Kehadirannya dalam Sastra Sunda

    No full text
    Liang Li Ji Oleh. Sastra Peranakan Tionghoa dan Kehadirannya dalam Sastra Sunda. In: Archipel, volume 34, 1987. pp. 165-179

    Selayang Pandang Penyelidikan Mengenai Indonesia di Tiongkok

    No full text
    Liang Li Ji Oleh. Selayang Pandang Penyelidikan Mengenai Indonesia di Tiongkok. In: Archipel, volume 24, 1982. pp. 17-21

    (24(3-4):32-42)STUDIES ON THE INHERITANCE OF QUANTITATIVE CHARACTERS IN A RANDOMLY INTERMATING POPULATION OF SWEET POTATOES (IPOMOEA BATATAS (L.) LAM.)

    No full text
    摘要利用甘藷逢機交配集團第4世代與第6世代各60個親本及其後裔之試驗資料,探討甘藷逢機交配集團數量性狀之遺傳情形,供甘藷品種改良參考應用。 在所研究之塊根重、莖葉重、每個塊根均重及塊根個數等四種性狀之表型變方中,其遺傳變方成分(6 切均佔有很大之比例,其數值在78%~82%之間,而親木與地黔交感作用變方成分(6 e/1)及機差變方成分(6 /rl)所佔之比例均較小。 在遺傳變方成分(6 中,塊根重、每個塊根均重及塊根個數之累加性變方(6 比非累加性變方為較重要,而莖葉重之遺傳變方成分中以非累加性變方為大,四種性狀中,累加性間交感變方(6 )均無存在。塊根重、每個塊根均重及塊根個數之遺傳率分別為44.5%、50%、及43.5%,其數值為較大,而莖葉重之遺傳率為較小,其數值為10.04%。在選擇強度為10%時,所求得預測及實測之遺傳增進率均較為接近。 塊根重之表型變方中,其遺傳變方成分(6 約佔82%(表5),而在遺傳變方中,其累加性變方(6 為0.021,佔0.0211/0.0390=0.54,為54%:非累加性為0.0179,佔0.0179/0.0390=0.46,為46%(表8),由此可知,應用混合選種,可期獲得良好效果。 Sixty-plants selected at random from each of the fourth and sixth generations of a randomly intermating sweet potato populations and their respective open-pollinated progeny provided the materials for use in quantitative genetic study. In all four characters, the genetic components (6 ) accounted for a large portion of the phenotypic variance. The values of genetic component was 78 to 82%. The interaction variance component of parents by locations and error variance component were relatively small. The additive component of genetic variance was relatively more important than the non-additive for root wt., average wt. per root and number of roots. For the stem and leaves wt., the main component of genetic variance is of the non-additive type. The estimates of 6 were zero for all 4 characters. Root wt., average wt. per root and number, of roots showed comparatively high hen-tabilities, 44.5%, 50% and 43.5%, respectively. Stem and leaves wt. showed the lowest heritability, 10.04%. With a selection intensity of 10%, the predicted and observed genetic advance as percent of the mean were fit well. In the root weight, about 82% of the phenotypic variance is accounted for by the genotypic variance component (Table 5) and about 54% of geneotypic variance was due to the additive component (Table 8). Thus this study indicates that mass selection procedures can be used to advantage in sweet potato breeding

    (23(4):255-262)STUDIES ON THE VARIATION AND MEAN PERFORMANCE IN SUCCESSIVE GENERATIONS OF A RANDOMLY INTERMATING POPULATION OF SWEET POTATOES

    No full text
    利用32個無密一切親緣關係,開花期良好之甘藷優良品種進行互交(Intercrossing),將每親本交配所得種子,取等量混合之,以開始產生甘藷逢機交配育種集團。由甘藷逢機交配集團各連續世代所得之資料,探討各連續世代之開花及結實情形與數量性狀之變異及平均表現。 甘藷逢機交配集團各連續世代開花及結實情形均甚良好,各世代開花株數佔總株數百分率均甚高,在95.8~98.5為之間,各連續世代中,開花期均集中在10月至11月之間。在7個連續世代中,種子生產量變域為108,004~321,537粒,每株平均種子數為90~276之間,由此可知,甘藷逢機交配集團不因有不開花及結實問題,而受到影響。 一般言之,甘藷塊根重、莖葉重、每個塊根均重及塊根個數等4種性狀之變異情形,有隨世代不同而表現有增加之傾向。由綜合分析結果可知,7個連續世代之平均表現,以中間世代之平均值有明顯之增加,此顯示由中間世代(Intervening generations)中,選拔優良品系,可期獲得優良效果。 Thirty-two sweet potato (Ipomoea batatas (L.) Lam.) parents selected from wide sources of unrelated materials and good flowering season were intercrossed at Chiayi Agricultural Experiment Station in 1965. The resulting seed from each parent were bulked in same numbers to generate a randomly intermating sweet potato population for use in the development of improved breeding procedures. The data obtained from the seven successive generations of random intermating were used to observe for flowering and seed setting characteristics and estimates of the mean level performance and the extent of variation. Both flowering and seed setting were more profuse in each of seven successive generations of open pollination. The rate of flowering plants of seven successive generations was 95.8% to 98.5%. A flowering peak occurred in October to November when 84.8% to 97.8% of the plants bloomed. The total seed production of the seven generations of open-pollination varied from 108,004 to 321,537 seeds. The average number of seeds per plant ranged from 90 to 276 seeds. Based on this observation, it appeared that the procedures for the random intermating sweet potato population was not affected by the flowering and fertility problems. In general, data in Fig. 1 to 4 indicate that there were a trend toward increase for the variability with change the generations of random intercrossing. The combined data show that a marked increase in mean performance obtained for the intervening generations as compared with the early and late generations. The results indicated that the selection for desirable characteristics imposed on the intervening generations of random intermating were apparently effective

    Supplemental material for Propensity score weighting analysis and treatment effect discovery

    No full text
    Supplemental material for Propensity score weighting analysis and treatment effect discovery by Huzhang Mao, Liang Li and Tom Greene in Statistical Methods in Medical Research</p

    Going Beyond Counting First Authors in Author Co-citation Analysis

    Full text link
    The 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
    corecore