Thursday, January 22, 2004

Tech day
Clark, et al., "Pattern of diversity in the genomic region near the maize domestication gene tb1," PNAS 101, 700-707: "the simplest interpretation of our analyses is that selection at tb1 has not appreciably affected genomic diversity at other genes." This is surprising because
Domestication has had far-reaching effects on crop genomes that are only now being understood. A common feature of domestication has been reduction of genetic diversity in crops relative to wild progenitors.... Selection is expected both (i) to reduce diversity at selected loci as favorable alleles are driven to high frequency and (ii) to reduce diversity at linked loci through the effect of genetic hitchhiking.
If this is a little over your head, the glossary of genetic terms will help.

Wilhelm, et al., "Crop and Soil Productivity Response to Corn Residue Removal," Agronomy Journal 96, 1-17 reviews the literature inconclusively, but serves warning that ethanol production may severely impoverish the corn belt's soil.

Gil-Izquierdo, et al., "Effect of the Rootstock and Interstock Grafted in Lemon Tree (Citrus limon (L.) Burm.) on the Flavonoid Content of Lemon Juice," J. Agric. Food Chem. 52, 324 -331 reveals the answer to something I've always wondered: grafted rootstock does affect the flavonoid content of the the fruit (in lemon trees at least). You probably have to be a wine geek to realize that I'm totally serious right now.

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