Recurrent selection for heat tolerance in diploid potatoes (solanum tuberosum subsp.phureja andstenotomum)

1983 ◽  
Vol 60 (7) ◽  
pp. 537-542 ◽  
Author(s):  
T. L. Gautney ◽  
F. L. Haynes
Keyword(s):  
Solanum Tuberosum ◽  
Heat Tolerance ◽  
Recurrent Selection ◽  
Selection For

scholarly journals Genetic gains for heat tolerance in potato in three cycles of recurrent selection

2011 ◽  
Vol 11 (2) ◽  
pp. 133-140 ◽  
Author(s):  
Flávio Rodrigo Gandolfi Benites ◽  
César Augusto Brasil Pereira Pinto
Keyword(s):  
Heat Tolerance ◽  
Recurrent Selection ◽  
Base Population ◽  
Genetic Gains ◽  
Growing Seasons ◽  
Second Growth ◽  
Tropical Conditions ◽  
Tuber Traits ◽  
Selection For ◽  
Tuber Specific Gravity

Practically all potato cultivars grown in Brazil are native to Europe and not fully adapted to the tropical conditions. The purpose of this study was to estimate the genetic gains of three cycles of recurrent selection for heat tolerance in potato. The base population in this study consisted of five Brazilian and five heat-tolerant clones. In the winter of 2006 and rainy growing season of 2007 103 clones were evaluated (eight clones of the base population, 29 of the first cycle, 32 and 30 of the second and third recurrent selection cycle, respectively, and four control cultivars). The genetic gains for tuber traits in both growing seasons were 37.8 % (yield), 13.0 % (weight), 32.4 % (percent of large tubers), 0.8 % (tuber specific gravity) and 16.6 % (general tuber appearance). The percentage of physiological disorders (second-growth tubers and cracking) was also reduced by selection.

Improvement of effectiveness in maize breeding

2006 ◽  
Vol 54 (3) ◽  
pp. 351-358 ◽  
Author(s):  
P. Pepó
Keyword(s):  
Recurrent Selection ◽  
Genetic Manipulation ◽  
Field Testing ◽  
Tissue Cultures ◽  
Maize Breeding ◽  
Breeding Programmes ◽  
Speed Up ◽  
Selection For

Plant regeneration via tissue culture is becoming increasingly more common in monocots such as maize (Zea mays L.). Pollen (gametophytic) selection for resistance to aflatoxin in maize can greatly facilitate recurrent selection and the screening of germplasm for resistance at much less cost and in a shorter time than field testing. In vivo and in vitro techniques have been integrated in maize breeding programmes to obtain desirable agronomic attributes, enhance the genes responsible for them and speed up the breeding process. The efficiency of anther and tissue cultures in maize and wheat has reached the stage where they can be used in breeding programmes to some extent and many new cultivars produced by genetic manipulation have now reached the market.

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