Tolerance of sugarcane parents to herbicides and its transmission in progeny
| MSI10P4461 | |
| Ramdoyal, K. Seeruttun, S. Badaloo, M. G. H. Barbe, C. | |
| Tolerance of sugarcane parents to herbicides and its transmission in progeny | |
| periodical article | |
| 2010 | |
| Proc. int. Soc. Sug. Cane Technol. | |
| 27: 10 p. | |
| En | |
| En | |
| Sugarcane varieties with one or both parents in common have been observed to show a similar tolerance level to the tank-mix of diuron and Actril-DSr. This study was initiated to evaluate parent varieties frequently used in the breeding program of the Institute, for transmission of their tolerance to herbicide in crosses. Sixty parents established in pots and later transplanted in replicated field trials were evaluated for their tolerance to the test herbicide tank-mix. Crosses were made with some selected parents with known tolerance and 15 families, comprising 40 seedlings each, were subsequently evaluated for their response to the same tank-mix. Parents differed significantly in their tolerance to herbicide and were classified as: tolerant (T) 10 per cent; slightly susceptible (SS) 34 per cent; moderately susceptible (MS) 25 per cent; susceptible (S) 25 per cent; highly susceptible (HS) 7 per cent. The phenotypic correlation between the degree of tolerance to the herbicide tank-mix evaluated in pots and in the field was moderately high, indicating that assessment of response of genotypes in pots can provide a useful indication of expression of tolerance at field level. The families also differed significantly in their tolerance to herbicide. Generally, crosses between T/SS x MS parents produced about 40 per cent and 46 per cent of progenies in the T/SS and MS classes, respectively. Conversely, S x HS crosses produced a very high proportion (75 per cent) of progenies in the S/HS. The degree of susceptibility to herbicide increases with the degree of susceptibility of the parental combination. A clear-cut segregation towards either T/SS or S/HS groups was not evident that could indicate the action of a major gene. Partitioning of variance indicated a high component of additive genetic variance, high narrow-sense heritability, and the possibility of breeding for the character through a judicious choice of parent varieties | |
| Sugarcane herbicide applications herbicide tolerance inheritance of herbicide tolerance varieties heritability genetics | |
| Mauritius | |
| Cane breeding and genetics | |
| Breeding: Breeding for tolerance to herbicides | |
| 2010-03-17 | |
| EN | |
| LIB | |
| CAT | |
| PB COWA |