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Summary Four different hybridization experiments were carried out to obtain interspecific hybrids with Spanish cultivars of lentil (Lens culinaris M.). In hybridization experiments I and II, undertaken with only pollination and pollination with the addition of gibberellic acid after fertilization, respectively, no lentil hybrids were recovered. A single interspecific hybrid with L. odemensis was obtained...
Summary One of the potential uses of Jerusalem artichoke (Helianthus tuberosus L.) is as a forage crop. Information on inherent differences in forage nutritional quality is essential if the quality of the forage is to be improved through breeding. The objectives of this study were to determine the genotypic variability among and within forage of Jerusalem artichoke cultivars for the concentration...
Summary The objectives of this research were to study the association in bread wheat between spectral reflectance indices (SRIs) and grain yield, estimate their heritability, and correlated response to selection (CR) for grain yield estimated from SRIs under reduced irrigation conditions. Reflectance was measured at three different growth stages (booting, heading and grainfilling) and five SRIs were...
Summary Seven Solanum tuberosum ssp. tuberosum and three Solanum tuberosum ssp. andigena accessions were crossed to produce 12 Tuberosum × Tuberosum (T × T) and 9 Tuberosum × Andigena (T × A) progenies. These families were evaluated for five important traits for two successive clonal generations under short day sub-tropical plains. The differences in yield, average tuber weight and tuber number between...
Summary Quantitative trait loci (QTL) analysis for Al tolerance was performed in rice using a mapping population of 98 BC1F10 lines (backcross inbred lines: BILs), derived from a cross of Al-tolerant cultivar of rice (Oryza sativa L. cv. Nipponbare) and Al-sensitive cultivar (cv. Kasalath). Three characters related to Al tolerance, including root elongation under non-stress conditions (CRE), root...
Summary The genetic dissection of morphological traits can helpful to evaluate their potential values as markers for rice genetic improvement. In this study, a RI population derived from a cross from Zhenshan97 and IRAT109 was used to dissect the genetic bases of seven morphological traits such as leaf sheath color (LSC), grain apiculus color (GAC), grain hairiness density (GHD), grain awn length...
Summary An Agropyron elongatum-derived leaf rust resistance gene Lr24 located on chromosome 3DL of wheat was tagged with six random amplified polymorphic DNA (RAPD) markers which co-segregated with the gene. The markers were identified in homozygous resistant F2 plants taken from a population segregating for leaf rust resistance generated from a cross between two near-isogenic lines (NILs) differing...
Summary The plant species Papaver somniferum L. (opium poppy) is grown commercially in several countries under secure area to produce opium and its major alkaloids i.e. morphine, codeine, thebaine, narcotine and papaverine for pharmaceutical industries. In recent years the global demand for these alkaloids and its derivatives are growing. Seeing the global demand there is urgent need to develop high...
Wheat (Triticum aestivum L.) cultivars for the warm regions of South Asia must produce high yields and possess resistance to spot blotch (Cochliobolus sativus), early maturity and high kernel weight. A study was conducted to determine the effectiveness of selecting for high grain yield based on a selection index for spot blotch resistance, maturity and kernel weight in four wheat crosses involving...
Summary The study was undertaken to evaluate the relative efficiency of anther culture and chromosome elimination (by crosses with maize) techniques of haploid induction in intergenotypic triticale and triticale × wheat hybrids. For this, 15 triticale × wheat and 8 triticale × triticale F1 hybrids were subjected to anther culture and were also simultaneously crossed with the `Madgran Local' genotype...
Summary For the past 10 years, the Andean-type Phaseolus vulgaris cultivar Kranskop has played an important role in South African bean production and breeding. Kranskop shares an ancestor with the internationally important Andean-type rust differential cultivar Redlands Pioneer. The Ur-13 gene in Kranskop and Redlands Pioneer gives protection to numerous internationally reported races of Uromyces appendiculatus...
Summary A transformation technique for the introduction of transgenes to control blackheart by particle bombardment has been developed for pineapple cv. Smooth Cayenne. Leaf callus cultures capable of high frequency organogenesis with a short regeneration time were used as explant material. Gus and gfp reporter genes were used to observe and determine transient and stable expression. The ppo gene,...
Summary Genetic diversity in microsatellites and development of agronomical characters in Nordic oat cultivars (Avena sativa) from the 20th century, ranging from landraces to new cultivars, were studied. A clear development in agronomical characters has taken place in this period: Straw length has been reduced, harvest index has increased and heading date has declined. The persistent oat breeding...
Summary The magnitude of genetic expression and associations among traits are important for the prediction of response to selection in diverse environments and provide the basis for planning and evaluating breeding programs. In this regard, a cross classification mating design was used to produce hybrid sorghum populations, which were evaluated in a randomized completed block design with three replications...
Summary On the basis of the conservative sequence of Δ12-fatty acid desaturase, a cDNA encoding the enzyme was isolated from different genotypes of Arachis. The cDNA consisted of 1140 bp and encoded a polypeptide of 379 amino acid resides with a calculated molecular weight of 42 KD. The predicted amino acid sequence had three histidine conservative regions sharing integral-protease specificity. Hydrophobicity...
Summary An efficient transformation system for Chinese cabbage cotyledon explants was developed using Agrobacterium tumefaciens strains LBA4404 harbouring the plasmid pMOG 411 and the plasmid pBinΩSCK respectively. Various factors affecting the transformation efficiency and subsequent regeneration were identified. The age of seedlings, growth conditions and status of Agrobacterium suspension, preculture...
Farmer participation in agricultural research is increasingly seen as a powerful methodology to increase the relevance of technologies developed to benefit farmers' communities. In plant breeding, farmer participation is considered as a way to increase the probability of adoption of new varieties. However, the higher expected cost of participatory plant breeding (PPB) is seen as one of the main obstacles...
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