Inbreeding in sugarcane varieties

Silva, Marcelo de Almeida; Gonçalves, Paulo de Souza

doi:10.1590/s0103-84782011005000028

Cited by 11 publications

(9 citation statements)

References 4 publications

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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%

Selfing rate estimation in sugarcane under unfavorable natural conditions of crossing by using microsatellite markers

Melloni¹,

Scarpari²,

Pinto³

et al. 2014

Genet. Mol. Res.

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ABSTRACT. The self-fertilization or selfing rate estimation using microsatellite markers and its impact on survival and selection rate were evaluated in families derived from polycrosses that involved parents that were widely used in sugarcane breeding in Brazil. These factors were evaluated under unfavorable natural conditions of flowering and crossing. After the germination test, the viable progeny were taken to the field for survival rate evaluation (4, 6, and 10 months) and phenotypic selection at plant cane. The selfing rate estimate based on microsatellite markers present in the progeny and absent in their female parent was 98.5 and 0% for the polycross families derived from IACSP95-5000 and SP89-1115, respectively. The survival and selection rates in the last 2 evaluations were higher for the SP89-1115 outcrossed family than the IACSP95-5000 selfed family. The IACSP95-5000 cultivar excelled either as pollen donor with fertilization capability or viable seed production even under unfavorable natural conditions of crossing. The Selfing rate in sugarcane environment influence (temperature and humidity) had an important role during the polycross.

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Section: Discussionsupporting

confidence: 86%

Selfing rate estimation in sugarcane under unfavorable natural conditions of crossing by using microsatellite markers

Melloni¹,

Scarpari²,

Pinto³

et al. 2014

Genet. Mol. Res.

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“…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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Selection in sugarcane based on inbreeding depression

et al. 2016

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ABSTRACT. This study aimed to evaluate the gene action associated with yield-related traits, including mean stalk weight (MSW), tons of sugarcane per hectare (TCH), and fiber content (FIB) in sugarcane. Moreover, the viability of individual reciprocal recurrent selection (RRSI-S1) was verified, and the effect of inbreeding depression on progenies was checked. The results were also used to select promising genotypes in S1 progenies. Eight clones (RB925345, RB867515, RB739359, SP80-1816, RB928064, RB865230, RB855536, and RB943365) and their respective progenies, derived from selfing (S1), were evaluated. Several traits, including the number of stalks, MSW, soluble solids content determined in the field, stalk height, stalk diameter, TCH, soluble solids content determined in the laboratory, sucrose content, and FIB were evaluated in a randomized block design with hierarchical classification. The results showed that the traits with predominant gene action associated with the dominance variance of MSW and TCH were most affected by inbreeding depression. The FIB, with predominant additive control, was not affected by selfing of the clones, and the RB867515⊗, RB928064⊗, RB739359⊗ and RB925345⊗ progenies performed best. Therefore, the use of S1 progenies for RRSI-S1 in sugarcane breeding programs is promising, and it should be explored for the future breeding of clones with high FIB levels.

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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%

Paternity identification in sugarcane polycrosses by using microsatellite markers

et al. 2014

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ABSTRACT. Although polycrosses have been used to test the potential of cross-combination of a large number of sugarcane parents, the male parent of the half-sib progenies produced is unknown. The present study aimed to integrate the molecular marker technology to the sugarcane polycross approach by the application of microsatellite markers to identify the male parent of 41 elite clones derived from polycross families. Ten microsatellite [single sequence repeats (SSRs)] primer pairs were used to identify the most likely male parent considering markers present in the selected clone but absent in the female parent. The number of alleles generated by the 10 microsatellite primer pairs ranged from 102 (cross-pollination lantern 4) to 120 (cross-pollination lantern 2) with an average of 113.25 alleles per SSR. The average genetic similarity among the involved parents in the polycrosses was 45.9%. The results of the analysis of the SSR markers absent in the female parent and present only in the selected clone as well as the genetic Paternity identification in sugarcane polycrosses similarity values allowed the identification of the most likely male parent in 73% of the total clones evaluated and also to detect probable contaminations. The obtained results highlight the importance of using molecular marker technology in the identification and confirmation of the male parent of high-performance clones derived from polycrosses in the sugarcane breeding programs.

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Inbreeding in sugarcane varieties

Cited by 11 publications

References 4 publications

Selfing rate estimation in sugarcane under unfavorable natural conditions of crossing by using microsatellite markers

Selfing rate estimation in sugarcane under unfavorable natural conditions of crossing by using microsatellite markers

Selection in sugarcane based on inbreeding depression

Paternity identification in sugarcane polycrosses by using microsatellite markers

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