In spite of its diverse limitations, the conventional propagation method is exclusively used for multiplication of sugarcane planting
materials in the Ethiopian Sugar Estates since the establishment of the sugar industry in 1954. The present study was carried out
to optimize in vitro shoot multiplication protocol for two selected sugarcane varieties (B41-227 and N14) widely grown in Ethiopian
sugar estates to complement with the conventional propagation method. In the study, initiated aseptic shoot tip cultures of the two
sugarcane varieties were treated with four concentrations (1.5, 2, 2.5 and 3 mgL-1) of 6- benzylaminopurine (BAP) and Indole-3-acetic
acid (IAA) (0.25, 0.5, 0.75 and 1 mgL- 1) while Plant growth regulator free medium was used as free check (control). The experiment
was set up in a completely randomized design (CRD) with three factor factorial treatment combinations arrangements. Data were
collected on number of shoots per explant, average shoot length and number of leaves per shoot after 30 days. Data were subjected
to three way analysis of variance. The study verified that medium fortified with 1.5 mgL-1 6-benzylaminopurine (BAP) and 0.5 mgL-1
indole-3-acetic acid (IAA) for B41-227 and 2 mgL-1 6-benzylaminopurine (BAP) and 0.25 mgL-1 indole-3-acetic acid (IAA) for N14
resulted in optimum multiplication responses. On these media, B41-227 produced 15.5 ± 2.90 shoots per explant with 5.93 ± 0.57 cm
average shoot length and 6.4 ± 1.49 leaves per shoot while N14 gave 11 ± 00 shoots per explant with 6.32 ± 0.23 cm average shoot
length and 5.8 ± 0.06 leaves. Thus, the optimized protocol can be used for rapid in vitro mass multiplication of the sugarcane varieties
and hence minimize the limitations sugarcane planting materials.
In spite of its diverse limitations, the conventional propagation method is exclusively used for multiplication of sugarcane plantingmaterials in the Ethiopian Sugar Estates since the establishment of the sugar industry in 1954. The present study was carried outto optimize in vitro shoot multiplication protocol for two selected sugarcane varieties (B41-227 and N14) widely grown in Ethiopiansugar estates to complement with the conventional propagation method. In the study, initiated aseptic shoot tip cultures of the twosugarcane varieties were treated with four concentrations (1.5, 2, 2.5 and 3 mgL-1) of 6- benzylaminopurine (BAP) and Indole-3-aceticacid (IAA) (0.25, 0.5, 0.75 and 1 mgL- 1) while Plant growth regulator free medium was used as free check (control). The experimentwas set up in a completely randomized design (CRD) with three factor factorial treatment combinations arrangements. Data werecollected on number of shoots per explant, average shoot length and number of leaves per shoot after 30 days. Data were subjectedto three way analysis of variance. The study verified that medium fortified with 1.5 mgL-1 6-benzylaminopurine (BAP) and 0.5 mgL-1indole-3-acetic acid (IAA) for B41-227 and 2 mgL-1 6-benzylaminopurine (BAP) and 0.25 mgL-1 indole-3-acetic acid (IAA) for N14resulted in optimum multiplication responses. On these media, B41-227 produced 15.5 ± 2.90 shoots per explant with 5.93 ± 0.57 cmaverage shoot length and 6.4 ± 1.49 leaves per shoot while N14 gave 11 ± 00 shoots per explant with 6.32 ± 0.23 cm average shootlength and 5.8 ± 0.06 leaves. Thus, the optimized protocol can be used for rapid in vitro mass multiplication of the sugarcane varietiesand hence minimize the limitations sugarcane planting materials.
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