caa a22 4500 477135706 CHVBK 20180405111717.0 cr unu---uuuuu 170330e19970501xx s 000 0 eng 10.1023/A:1003056500991 doi (NATIONALLICENCE)springer-10.1023/A:1003056500991 Genetic analysis of yield and related traits in sunflower (Helianthus annuus L.) in dryland and irrigated environments [Elektronische Daten] [J.O. Alza, J.M. Fernandez-Martinez] The definition of a suitable breeding strategy in drought-prone environments is an important task for sunflower breeders. To achieve this task, reliable information on heritability and gene effects on yield and related traits under these conditions is necessary. Thirty six sunflower hybrids were produced by factorial cross of six male-sterile and six restorer lines. Parents and their hybrids were evaluated in eight environments. Six environments consisted of two adjacent trials in the experimental area, the first under irrigation and the second under dryland conditions, during 1987, 1988 and 1992. The other environments were: one early planting trial in dryland conditions, conducted during 1987, and a winter trial planted in January during 1988. Estimates of female variance (σf) were significant for seeds per head, seed weight, head sterile center, days to blooming and oil content. Female × male interactions (σ2 fm) were significant for all characters except harvest index and index of susceptibility to drought. Estimates of narrow sense heritabilities, calculated with information from analyses combined across environments, were 0.65 for yield, 0.80 for seeds per head, 0.84 for seed weight, 0.81 for head diameter, 0.60 for sterile head center, 0.72 for oil content, 0.61 for harvest index, 0.72 for biomass, 0.94 for days to bloom, and 0.42 for drought susceptibility index. Heritability estimates for individual environments showed more variation for yield than for other traits. Estimates for heritability of canopy temperature were high (0.68-0.79). Rainfed yield was positively correlated with yield components and negatively correlated with canopy temperature and susceptibility index. It is concluded that an efficient breeding strategy for sunflower under moderate drought-stressed conditions is the simultaneous selection for seed yield in both rainfed and irrigated environments together with selection for canopy temperature and stem diameter. Kluwer Academic Publishers, 1997 Helianthus annuus L nationallicence drought conditions nationallicence rainfed yield nationallicence sunflower nationallicence heritability nationallicence Alza J.O. Instituto de Agricultura Sostenible, CSIC, Apdo. 4084, 14080, Córdoba, Spain aut Fernandez-Martinez J.M. Instituto de Agricultura Sostenible, CSIC, Apdo. 4084, 14080, Córdoba, Spain aut Euphytica Kluwer Academic Publishers 95/2(1997-05-01), 243-251 0014-2336 95:2<243 1997 95 10681 https://doi.org/10.1023/A:1003056500991 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1003056500991 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Alza J.O. Instituto de Agricultura Sostenible, CSIC, Apdo. 4084, 14080, Córdoba, Spain aut NATIONALLICENCE 700 1- Fernandez-Martinez J.M. Instituto de Agricultura Sostenible, CSIC, Apdo. 4084, 14080, Córdoba, Spain aut NATIONALLICENCE 773 0- Euphytica Kluwer Academic Publishers 95/2(1997-05-01), 243-251 0014-2336 95:2<243 1997 95 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer