Resistance to rust and smut among Puerto Rico sugarcane clones

1969 ◽  
Vol 73 (1) ◽  
pp. 45-49
Author(s):  
Rodrigo Echávez-Badel ◽  
Jorge L. Rodríguez ◽  
Carlos E. Ortiz
Keyword(s):  
Puerto Rico ◽  
Rust Resistance ◽  
Puccinia Melanocephala ◽  
Ustilago Scitaminea

One hundred and ninety-two sugarcane clones were evaluated for resistance to rust (Puccinia melanocephala) H. Syd. and P. Syd.) and to smut (Ustilago scitaminea Syd.), between March 1985 and March 1988. Fiftynine clones (31%) were resistant to both rust and smut in plant cane, and in the first and second ratoon crops. Incidence of smut increased after ratooning. Some 81 to 96% were resistant to rust. Rust resistance remained unchanged in plant cane and ratoon crops.

scholarly journals Productivity of new sugarcane hybrids in the Lajas Valley and their resistance to smut and rust

1969 ◽  
Vol 75 (3) ◽  
pp. 287-293
Author(s):  
Rodrigo Echávez-Badel
Keyword(s):  
Puerto Rico ◽  
Analysis Of Variance ◽  
Rust Resistance ◽  
The Other ◽  
Irrigated Area ◽  
Ustilago Scitaminea ◽  
Crop Cycle ◽  
Check Variety ◽  
Sugarcane Hybrids ◽  
Semi Arid

Seventeen promising new sugarcane hybrids and three check varieties were planted in the Lajas valley, a semi-arid and irrigated area of southwestern Puerto Rico. Plant cane and ratoon crops were evaluated for yield and resistance to smut (Ustilago scitaminea Syd.) and rust (Puccinia melanocephala H. Syd. & P. Syd.). All new hybrids tested were resistant and tolerant to smut and rust. The smut incidence on susceptible check increased after ratooning. However, rust resistance and susceptibility of sugarcane hybrids and check varieties remained unchanged throughout a three-crop cycle. Combined analysis of variance of 2 years (plant and first ratoon crops) indicated that yields (sugar ton/ha) of five hybrids were consistently higher than those of the other genotypes tested, including the standard check variety PR 980.

Ustilago scitaminea. [Distribution map].

1991 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
Puerto Rico ◽  
Central America ◽  
West Indies ◽  
Ivory Coast ◽  
Ryukyu Islands ◽  
Distribution Map ◽  
Caribbean Islands ◽  
Ustilago Scitaminea ◽  
New Distribution

Abstract A new distribution map is provided for Ustilago scitaminea H. Sydow. Hosts: Sugarcane (Saccharum). Information is given on the geographical distribution in Africa, Burkina Faso, Congo, Egypt, Ethiopia, Ghana, Ivory Coast, Kenya, Madagascar, Malawi, Mali, Mauritius, Mozambique, Niger, Nigeria, Reunion, Somalia, South Africa, Sudan, Swaziland, Tanzania, Uganda, Zaire, Zambia, Zimbabwe, Asia, Afghanistan, Burma, Cambodia, China, Canton, Szechwan, Kwantung, Hong Kong, India, Indonesia, Java, Iran, Japan, Malaysia, Nepal, Ryukyu Islands, Pakistan, Philippines, Sri Lanka, Taiwan, Thailand, Vietnam, USSR, Turkestan, Australasia & Oceania, Fiji, Hawaii, Europe, Portugal, North America, Mexico, USA, Florida, Hawaii, Louisiana, Texas, Central America & West Indies, Barbados, Belize, Caribbean Islands, Costa Rica, Cuba, Dominican Republic, Guadeloupe, Haiti, Honduras, Jamaica, Martinique, Nicaragua, Puerto Rico, St Kitts, Trinidad & Tobago, South America, Argentina, Bolivia, Brazil, Minas Gerais, Sao Paulo, Rio de Janeiro, Ceara, Colombia, Guyana, Surinam, Venezuela.

Puccinia melanocephala. [Distribution map].

1981 ◽  
Author(s):  
Keyword(s):  
Puerto Rico ◽  
Central America ◽  
West Indies ◽  
Andhra Pradesh ◽  
New South ◽  
Uttar Pradesh ◽  
Distribution Map ◽  
Puccinia Melanocephala ◽  
South Wales ◽  
New Distribution

Abstract A new distribution map is provided for Puccinia melanocephala H. & P. Sydow. Hosts: Sugar cane (Saccharum), Erianthus spp. Information is given on the geographical distribution in AFRICA, Cameroon, Kenya, Madagascar, Malawi, Mauritius, Reunion, South Africa, Tanzania, Uganda, Zambia, Zimbabwe, ASIA, China (Hupeh, Yunnan), India (Andhra Pradesh, Himachal Pradesh, Madras, Maharashta, Mysore, Punjab, Uttar Pradesh), Nepal, Taiwan, AUSTRALASIA & OCEANIA, Australia (Queensland), (New South Wales), NORTH AMERICA, Mexico, USA (Florida, La), (Mississippi), CENTRAL AMERICA & WEST INDIES, Barbados, Belize, Cuba, Dominican Republic, Guadeloupe, Guatemala, Haiti, Honduras, Jamaica, Panama, Puerto Rico, Salvador, Trinidad, SOUTH AMERICA, Guyana, Venezuela.

scholarly journals Targeting Gene Combinations for Broad-spectrum Rust Resistance in Heat-tolerant Snap Beans Developed for Tropical Environments

2010 ◽  
Vol 135 (6) ◽  
pp. 521-532 ◽  
Author(s):  
Charles J. Wasonga ◽  
Marcial A. Pastor-Corrales ◽  
Timothy G. Porch ◽  
Phillip D. Griffiths
Keyword(s):  
Puerto Rico ◽  
Heat Tolerance ◽  
Rust Resistance ◽  
Eastern Africa ◽  
Snap Bean ◽  
Breeding Lines ◽  
Snap Beans ◽  
Tropical Environments ◽  
Heat Tolerant ◽  
Rust Resistance Genes

Common bean rust disease (caused by Uromyces appendiculatus) and high temperatures (heat stress) limit snap bean (Phaseolus vulgaris) production in many tropical and temperate regions. We have developed snap bean lines combining broad-spectrum rust resistance with heat tolerance for tropical agroecosystems. Eight breeding populations were developed by hybridizing BelJersey-RR-15 and BelFla-RR-1 (each possessing the Ur-4 and Ur-11 rust resistance genes) and the heat-tolerant snap bean breeding lines HT601, HT603, HT608, and HT611. F2–F4 generations of the populations were evaluated under greenhouse conditions and selected for heat tolerance while simultaneously selecting for the rust resistance genes Ur-4 and Ur-11. Three heat-tolerant F5 lines, which were homozygous for Ur-4 and Ur-11 genes, were selected together with a rust-resistant but heat-sensitive control. These and 12 cultivars adapted to different geographical regions were evaluated for their reaction to rust and yield at six contrasting field sites in eastern Africa and their response to high temperature verified in Puerto Rico. Rust incidence and severity was high at three of the trial sites in eastern Africa. Two of the 12 cultivars were resistant to rust at most of these sites, and three of the four breeding lines were resistant at all sites. The Ur-11 gene effectively conferred rust resistance at all sites. Yield in Puerto Rico was strongly correlated (R2 = 0.71, P < 0.001) with that of the hottest site in eastern Africa, highlighting the similarity in genotypic response to high temperatures at the two distinct sites. The newly developed rust-resistant and heat-tolerant breeding lines showed stable yield at the eastern Africa sites with contrasting mean temperatures compared with the cultivars presently grown in the region. Two of these lines, HT1 and HT2, were confirmed to be homozygous for Ur-4 and Ur-11 and with high heat tolerance under both greenhouse and field environments. This research validates the effectiveness of targeted rust resistance gene combinations for tropical environments and the effective selection of high temperature tolerance traits correlating across multiple environments. The breeding lines HT1 and HT2 developed in this research could be used to improve snap beans for the tropics and other environments with similar constraints.

scholarly journals Culture of Puccinia melanocephala on detached leaves and uprights of sugarcane in Puerto Rico

1969 ◽  
Vol 66 (3) ◽  
pp. 168-176
Author(s):  
Lii-Jang Liu
Keyword(s):  
Puerto Rico ◽  
Nutrient Solution ◽  
Infection Type ◽  
Natural Infection ◽  
Petri Dish ◽  
Test Tube ◽  
Puccinia Melanocephala ◽  
Detached Leaves ◽  
Petri Dishes ◽  
Nutrient Solutions

Sugarcane rust (Puccinia melanocephala) was cultured through its uredial and telial stages on detached leaves and uprights of 10 sugarcane cultivars in test tube, as well as in petri dish-benzimidazole, kinetin and nutrient solutions. The infection type, incubation period and severity of rust varied with cultivars and with age of the plant. Detached uprights in test tubes containing benzimidazole nutrient solution (5 ml of 25 p/m benzimidazole + 5 ml of nutrient solution) stayed green more than 30 days. Uredial and telial pustules developed better on detached uprights than on detached leaves. Rust developed better on detached leaves in test tube containing benzimidazole nutrient solution than on leaves in the petri dishes containing the same solution; there was less rust development on detached leaves from 6-month-old plants than on those from younger ones. More than 95% of the 90 cultivars inoculated with the detached upright technique, showed rust reactions corresponding with those observed under natural infection in the fields.

Puerto Rico: A Cultural Crossroads

ASHA Leader ◽  
2008 ◽  
Vol 13 (15) ◽  
pp. 38-40
Author(s):  
Albert Villanueva-Reyes
Keyword(s):  
Puerto Rico
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