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Genetic erosion in crops: concept, research results and challenges
TLDR
The different approaches in the recent literature to measure genetic erosion in crops are reviewed and the most likely scenario of diversity trends during modernization is a reduction in diversity due to the replacement of landraces by modern cultivars, but no further reduction after this replacement has been completed.
Genetic diversity trends in twentieth century crop cultivars: a meta analysis
TLDR
The meta analysis demonstrated that overall in the long run no substantial reduction in the regional diversity of crop varieties released by plant breeders has taken place, and indications are that after the 1960s and 1970s breeders have been able to again increase the diversity in released varieties.
Ecological interactions drive evolutionary loss of traits.
TLDR
A new perspective on so-called `compensated trait loss' is developed and how this type of trait loss may affect the evolutionary dynamics between interacting organisms is developed, showing that compensated trait loss is taxonomically widespread, can involve essential traits, and often occurs as replicated evolutionary events.
Loss of lipid synthesis as an evolutionary consequence of a parasitic lifestyle
TLDR
It is demonstrated that loss of an essential me-tabolic trait in parasitic wasps has evolved through environmental compensation and is more common than currently anticipated.
AFLP Analysis of Enset Clonal Diversity in South and Southwestern Ethiopia for Conservation
TLDR
The exchange between regions suggested by this study indicates that unexplored additional diversity, if existing, should mainly occur in divergent farming systems and suggests the existence of substantial levels of phenotypic plasticity in enset.
A novel Bacillus thuringiensis gene encoding a Spodoptera exigua-specific crystal protein
TLDR
The nucleotide sequence analysis and the toxicity studies showed that this novel crystal protein gene falls into a new cryl gene subclass, and it is proposed that this subclass be referred to as cryIE.
Molecular cloning and the nucleotide sequence of the Mr 28 000 crystal protein gene of Bacillus thuringiensis subsp. israelensis.
TLDR
It was concluded that transcription of the Bacillus thuringiensis subspecies israelensis gene is restricted to early sporulation stages and regulation signals are poorly recognized by E. coli RNA polymerase.
Trypsin inhibitor activity in mature tobacco and tomato plants is mainly induced locally in response to insect attack, wounding and virus infection
TLDR
Irrespective of the type of wounding, in neither tobacco nor tomato could systemic induction of TI activity be observed in nearby unwounded leaves, which suggests that systemic inductionof TI activity in mature tobacco and tomato plants is different from systemic TI induction in seedlings.
Expression of giant silkmoth cecropin B genes in tobacco
TLDR
These experiments indicate that introduction and expression of cecropin B genes in tobacco does not result in detectable cecopin B protein levels and resistance to bacterial infections, most likely due to degradation of the protein by endogenous proteases.
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