豫南茯砖茶品质化学特性研究

豫南茯砖茶是河南茶区近年来新开发的茶叶品类,为研究豫南茯砖茶的品质化学特性,试验抽取了产自信阳、南阳的10个具有代表性的茯砖茶样进行研究。结果表明,豫南茯砖茶中的游离氨基酸总量、儿茶素总量、没食子酸含量均值分别为17.31 mg/g、26.34μg/mL、7.56μg/mL;水浸出物和茶多酚均值分别为34.41%、26.49%,变异系数分别为31.02%、38.22%、31.07%、15.61%、15.59%。研究初步揭示了豫南茯砖茶生化成分组成,为进一步稳定和提高豫南茯砖茶品质提供了参考依据。

基因组倒位变异参与塑造了水稻遗传和表型的多样性

Genomic structural variations affected widely gene function and morphological traits in plants.Chromosomal inversions(INVs),as an important form of structural variation,can be large and extend to megabases in length[1],and form the genetic basis of local adaptation and ecotypic differentiation in sunflowers[2],Boechera stricta[3],monkeyflowers[4],mimetic butterflies[5]and ruffs[6],sex determination in nine-spined stickleback[7]and cancer and neurodevelopmental disease in human[8].At present,structural variants,and in particular,INVs,remain largely uncharacterized in plants despite their importance for local adaptation in a variety of species[1],with only a few studies exploring INVs polymorphisms at the population level.Hence,it remains unclear whether adaptive INVs can directly shape the genetic basis for diverse phenotypes in plants,especially in domesticated crops.