Citrus breeding is a lengthy process complicated by a long juvenile period, heterozygosity, and nucellar embryony. The advent of molecular markers now permits the construction of accurate linkage maps, the investigation and mapping of agronomic traits using quantitative trait loci (QTLs), and...

Citrus genetic improvement through conventional methods is greatly hindered by nucellar polyembryony, pollen and/or ovule sterility, and wide incompatibility. Protoplast fusion is an alternative that can be used to circumvent these difficulties and efficiently transfer resistances to biotic and...

As part of a study of sugar metabolism in citrus fruit, a full-length cDNA encoding for the two subunits of the PPi-dependent phosphofructokinase (PFPα; PFPβ) were cloned from grapefruit juice sac cells. The clones share over 85% homology with PFPs of other plants. Expression of the genes was...

In diverse ethylene-responsive systems, including ripening of mature-green bananas (Musa sapientum [M. paradisiaca]), inhibition of growth in etiolated pea seedlings, abscission of orange leaf explants and Vigna radiata leaves, and wilting of campanula (Campanula carpatica) and kalanchoe (Kalanchoe ...

The potency to inhibit ethylene action of twelve new water-insoluble volatile cyclopropenes was assessed. This inhibitory effect was tested on the following test systems: ethylene-induced ripening of climacteric fruits, ethylene-induced growth modifications in etiolated pea seedlings and abscission ...

Attended by scientists, students, extension officers, marketing representatives and growers from 13 citrus growing countries, the 32 papers presented at this symposium are grouped into 4 sessions: (1) genome mapping and taxonomy; (2) genes and physiology; (3) genetics and breeding; and (4) viruses...

Haploid embryogenic calli and plantlets of Citrus clementina cv. Nules were obtained from anther culture in 1990. Since then, several studies have been carried out to improve the frequency with which microspores form embryos and the percentage of successful plants transferred from in vitro to in...

Two avocado rootstocks (Persea americana), the salt-tolerant Degania-113 and the salt-sensitive Smith, and 2 citrus rootstocks, the salt-tolerant Cleopatra mandarin (Citrus reshni) and the salt-sensitive Troyer citrange, were grown in a sandy soil and irrigated daily with nutrient solutions...

The varieties Flying Dragon, Davis A, Kryder, the citranges Carrizo and Rusk, and the citrandarins Cleopatra × Rubidoux and Sunki × English Large (Citrus sunki × P. trifoliata) were examined for the presence of random amplified polymorphic DNA (RAPD) markers in the linkage group where the citrus...

The use of paclobutrazol to both increase flowering and restrict excessive vegetative growth in orchards of orange cv. Shamouti, lemon cv. Villafranca and tangelo cv. Minneola trees was investigated. Paclobutrazol (as Cultar), applied as a foliar spray (2000 or 5000 p.p.m.) or to the soil (20 or 50 ...