Yale Environment 360: Scientists say they have identified the gene responsible for the yield of oil palm crops, a discovery that could boost the productivity of the worlds top source of vegetable oil and help reduce the size of oil palm plantations in the worlds tropical regions. Writing in the journal Nature, Malaysian and U.S. researchers describe the mapping of the genome of the oil palm, whose products are used in everything from food to cosmetics to biofuels. According to the scientists, the so-called shell gene...