scholarly journals Evaluation of beans (Phaseolus vulgaris L.) in early generations for resistance to Xanthomonas campestris pv. phaseoli (Smith) dye

1969 ◽  
Vol 80 (1-2) ◽  
pp. 55-63
Author(s):  
Oswaldo Varela ◽  
James Beaver ◽  
Mildred Zapata ◽  
Phillip Miklas ◽  
Silvia Cianzio
Keyword(s):  
Puerto Rico ◽  
Phaseolus Vulgaris ◽  
Leaf Area ◽  
Xanthomonas Campestris ◽  
University Of Puerto Rico ◽  
Phaseolus Vulgaris L ◽  
Selection For ◽  
The University ◽  
Two Populations ◽  
Better Than

Two populations from the crosses DOR 364 x XAN 176 and DOR 364 x WBB-20-1 were tested in the field in the F3 and F4  generations and under greenhouse conditions in the F5 generation to determine the effectiveness of selection for resistance to Xanthomonas campestris pv phaseoli (Xcp) in early generations and to estimate the heritability (h2) of foliage resistance to Xcp. The study was conducted at the Isabela Substation of the University of Puerto Rico in 1991. Significant differences among lines for Xcp reaction were observed in the three generations evaluated.The parents, XAN 176 and WBB-20-1, showed more resistance to Xcp than DOR 364. The h2 of the resistance to Xcp in the leaves was intermediate to high (> 0.60) for the DOR 364 x XAN 176 population. In the DOR 364 x WBB-20-1 population, however, the h2 was low (0.30) in the F3 generation, and intermediate to high (> 0.60) in the F4 and F5 generations. Evaluation in the F3 generation requires at least three replications to have adequate precision to detect differences among lines. Selection in the F4 generation was more effective because of higher heritabilities.The evaluation of the disease on the basis of a 1 to 9 scale was better than estimates of the percentage of leaf area infected because there was less variation among generations. In addition, variances among groups of lines were more homogeneous.

THE INHERITANCE OF OZONE INSENSITIVITY IN SELECTED Phaseolus vulgaris L. POPULATIONS

1982 ◽  
Vol 62 (4) ◽  
pp. 861-865 ◽  
Author(s):  
P. HUCL ◽  
W. D. BEVERSDORF
Keyword(s):  
Phaseolus Vulgaris ◽  
Broad Sense ◽  
Field Conditions ◽  
Broad Sense Heritability ◽  
Phaseolus Vulgaris L ◽  
Selection For ◽  
Heritability Estimates ◽  
Two Populations

Broad sense heritability estimates (H) for ozone (O3) insensitivity in four P. vulgaris F2 populations were high (0.66–0.88) under artifical fumigation conditions. In the F3, under field conditions, broad sense H in two populations had declined to 0.16 and 0.21, probably as a result of the interaction of maturity and injury. The results suggest that selection for O3 insensitivity in early generations should be conducted under controlled fumigation conditions followed by field evaluations as lines approach homozygosity.

scholarly journals Hurricane Maria and its Impact on the Zoological and Botanical Collections of the University of Puerto Rico

2018 ◽  
Vol 2 ◽  
pp. e26014
Author(s):  
Nikolaos Schizas
Keyword(s):  
Puerto Rico ◽  
Structural Damage ◽  
Marine Invertebrates ◽  
Biological Research ◽  
Caribbean Region ◽  
University Of Puerto Rico ◽  
Federal Grant ◽  
Research Profile ◽  
The Usa ◽  
The University

With a total of more than 150,000 specimens, the 85-year old collections of insects and terrestrial, freshwater, and marine invertebrates of the University of Puerto Rico at Mayagüez (UPRM), western Puerto Rico, are among the most significant repositories for these groups in the Caribbean region. Located in Mayagüez and on Magueyes Island, these collections were created by outstanding insect and invertebrate specialists working in Puerto Rico and surrounding islands. Holdings are particularly strong in the Hemiptera, Lepidoptera, Coleoptera, Collembola, Crustacea, Mollusca, Echinodermata, and Cnidaria. Collecting and curatorial activities, initiated in the 1920s, were maintained throughout the 1980s, resulting in many taxonomically and historically valuable records for the region. From 1990 to 2005, the invertebrate collections were increasingly neglected, with certain parts scattered throughout multiple buildings and rooms, inaccessible, or inadequately stored and at risk of becoming damaged or lost. The support for these collections was not sustained at high levels due to a variety of factors, including changes in the research profile of new academic appointments and the shortsightedness of administrators to fully understand the cultural, educational and scientific value of the museum holdings. With the exception of a federal grant through NSF - DBI (National Science Foundation - Biological Research Collections - PI Frantz - 2007-2010), which initiated a flurry of Museum related activities to improve the deteriorating museum facilities throughout the UPRM campus, the Museum collections are now facing even more challenges, some anthropogenic and very recently, some natural. Major Hurricane Maria (Category 4), delivered a devastating blow to the island of Puerto Rico on 20 September 2017. Both terrestrial and marine ecosystems were heavily impacted. Extensive structural damage to roads, telecommunications, water systems, the energy grid and approximately 60,000 houses/buildings made Hurricane Maria the most damaging Hurricane (estimated cost ~ 90 billion dollars) in the USA after Katrina and Harvey. Flooding caused by the direct impact of Hurricane Maria (5 to 40 inches of rain fell during the first 48 hours in Puerto Rico) and subsequent extensive loss of electricity caused unfavorable conditions for the collections. The University of Puerto Rico in Mayaguez closed for approximately 45 days and limited electricity, if any, was available through diesel generators. High levels of humidity and heat can cause further structural damage as well as favor the growth of fungus in enclosed areas of UPRM, including the Museums. Efforts to safeguard the collections will be outlined here to ensure the collections remain a valuable natural asset of the people of Puerto Rico as part of their natural patrimony and as an irreplaceable education tool.

Los amarres de la lengua: Spanish Exiles, Puerto Rican Intellectuals, and the Battle over Spanish, 1942–2016

2019 ◽  
pp. 126-143
Author(s):  
Lena Burgos-Lafuente
Keyword(s):  
Puerto Rico ◽  
Puerto Rican ◽  
Short Story ◽  
21St Century ◽  
Main Argument ◽  
University Of Puerto Rico ◽  
The Caribbean ◽  
The University ◽  
Pedro Salinas

The chapter provides a genealogy of the 2016 CILE (Congreso Internacional de la Lengua Española), during which the Spanish officialdom celebrated Puerto Rico's linguistic ties to Spain as a 21st-century mercantile ploy. I review the language debates that raged in Puerto Rico in the 1940s, examining Pedro Salinas' 1948 Commencement Speech at the University of Puerto Rico, which would become his famed "Defensa del lenguaje"; revisiting Gov. Luis Muñoz Marín's 1953 speech "La personalidad puertorriqueña en el Estado Libre Asociado"; and ending with a brief coda on Ana Lydia Vega's 1981 short story "Pollito Chicken," to reflect on the positions shared by both Spanish exiles to the Caribbean and local intellectuals regarding language as a self-evident vessel of identity. The main argument is that a rhetoric of defense, crystallized in the 1940s, was redeployed by successive and presumptively opposite segments of the intelligentsia.

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