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Proembryogenic calli were initiated from basal leaf sheaths and rhizome tissue on modified Schenk and Hildebrandt (SH) medium with 30 μM 3,6–dichloro–2–meth–oxybenzoic acid (Dicamba). Cell suspensions were maintained in half–strength Murashige and Skoog (MS) medium supplemented with 20 μM Dicamba. The development of somatic embryos was promoted in cell(More)
Flow cytometry and stomata characteristics were used for screening ploidy levels in a large population of in vitro induced autopolyploids of the Musa acuminata breeding clone SH-3362. Culturing shoot tips in liquid medium stipplemented both with 5.0 mM colchicine for 48 hours or 30 μM oryzalin (3,5-dinitro-N4,N-dipropylsulphate) for seven days, both in(More)
An Agrobacterium-mediated plant transformation system was developed for the generation of transgenic banana (Musa spp. van Grand Nain). This system allowed for the recovery of putative transformants within four weeks after co-cultivation of tissue samples with Agrobacterium. Two or more cycles of meristem rooting and micropropagation allowed for the(More)
DNA oligonucleotide and amplification fingerprinting have been successfully used to detect genetic polymorphisms in 15 representative species and cultivars of the genus Musa, comprising AA, AAA, AAAA, AAB, ABB, and BB genotypes. In–gel–hybridization of Hinf I–digested genomic banana DNA to the 32P–labeled synthetic oligonucleotides (GATA)4, (GTG)5, and(More)
Field experiments were conducted to determine the effects of the amount, time and method of fertilizer N application on the efficiency of N uptake, N2 fixatio and yield of soybean. Soil and foliar fertilizer N, applied during the pod-filling stage were absorbed by plants with equal and high efficiency, compared to an appreciably lower utilization efficiency(More)
The genetic diversity of three salinity tolerant rice varieties Pokkali, Nona-Bokra and Bicol was investigated using random amplified polymorphic DNAs(RAPDs). High yielding susceptible variety IR29 was used as check for comparison. The salinity performance of these varieties were tested by using rapid screening techniques at seedling stage. One hundred(More)
In southern and south-western Ethiopia, Ensete ventricosum is grown as an important starchy, staple food crop, supporting the diet of a quarter of the Ethiopian population. Due to difficulty in germinating seeds and the long vegetative period, breeding enset is extremely difficult. Adventitious buds and somatic embryos have been induced from callus derived(More)
Important methods to artificially induce mutations are the use of chemical and physical agents. Most chemical mutagens are alkylating agents and azides. Physical mutagens include electromagnetic radiation, such as gamma rays, X rays, and UV light, and particle radiation, such as fast and thermal neutrons, beta and alpha particles. Mutagenic treatment of(More)
Doubled haploids have long been recognized as a valuable tool in plant breeding since it not only offers the quickest method of advancing heterozygous breeding lines to homozygosity, but also increases the selection efficiency over conventional procedures due to better discrimination between genotypes within any one generation. Ten cultivars of japonica(More)
The origin of somatic embryos derived from rhizome explants of triploid Musa cv. Grand Nain was the subject of histological studies during different phases of ontogenetic development. The investigation revealed that the majority of somatic embryos showed normal root formation and consisted of highly vacuolated cells in the poorly structured shoot apex. The(More)