2011
DOI: 10.1590/s0103-84782011005000028
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Inbreeding in sugarcane varieties

Abstract: Sugarcane species are allogamous, i.e. selfing is expected to reduce plant vigor. This study was undertaken to obtain and evaluate first-generation inbred lines that may be used for further crosses and determine the extent of inbreeding depression in sugarcane. In this research, 26 parental varieties were self-pollinated to obtain about 19,000 seedlings. Results showed that it is possible to segregate different traits in a given variety and find lines with promising outcome for all assessed characteristics. Th… Show more

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Cited by 11 publications
(10 citation statements)
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“…The SP89-1115 outcrossing family presented the higher percentage of selection relative to the selfing family (the IACSP95-5000 family), which were less developed and displayed signs of illness. A similar result was reported by Silva and Gonçalves (2011), who studied segregation in the first generation of selfed sugarcane and observed a strong inbreeding depression for the plant development traits (height and stalk weight).…”
Section: Discussionsupporting
confidence: 86%
“…The SP89-1115 outcrossing family presented the higher percentage of selection relative to the selfing family (the IACSP95-5000 family), which were less developed and displayed signs of illness. A similar result was reported by Silva and Gonçalves (2011), who studied segregation in the first generation of selfed sugarcane and observed a strong inbreeding depression for the plant development traits (height and stalk weight).…”
Section: Discussionsupporting
confidence: 86%
“…Due to inbreeding effects, the MSW of SP80-1816⊗ was only half of that observed in its parent (Table 3). The MSW results were in agreement with the results of Ferreira et al (2005) and Silva and Gonçalves (2011), which also indicated a reduction in the MSW mean due to selfing.…”
Section: Resultssupporting
confidence: 87%
“…SSF was divided into three groups, and the mean values of the first group (containing clones and the SP80-1816⊗ and RB928064⊗ progenies) varied from 19.03 to 20.14%. Silva and Gonçalves (2011) reported values between 14.5 to 19.9% to for SSL, but the authors found that some selfed progenies had higher means than their clones.…”
Section: Resultsmentioning
confidence: 97%
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“…It is interesting to note that, among the clones (progenies) evaluated, none was derived from self-fertilization, which can probably be attributed to the fact, as mentioned earlier, that they were previously selected for attributes such as productivity (TSH). This trait is greatly affected by inbreeding depression (Silva and Gonçalves, 2011). According to McIntery and Jackson (2001), in breeding programs, there is a trend to evaluate and select the most vigorous clones in order to produce cultivars with higher productivity, since reduction in vigor has been used as the main criterion for the identification and discarding of selfing progenies.…”
Section: Discussionmentioning
confidence: 99%