Actively Expressed Intergenic Genes Generated by Transposable Element Insertions in Cotton.

The genomes and annotated genes of allotetraploid cotton have been extensively studied in recent years. However, the expression, regulation, and evolution of intergenic genes (ITGs) have not been completely deciphered. In this study, we identified a novel set of actively expressed ITGs in cotton, through transcriptome profiling based on deep sequencing data, as well as chromatin immunoprecipitation, followed by sequencing (ChIP-seq) of histone modifications and how the ITGs evolved.

Phylogeographical Pattern and Population Evolution History of Indigenous L. on Qinghai-Tibetan Plateau.

Elymus sibiricus L. is a perennial allotetraploid belonging to Triticeae of Poaceae, L., as the type species of genus L.

Non-linear genetic diversity and notable population differentiation caused by low gene flow of bermudagrass [ (L.) Pers.] along longitude gradients.

Background: Environmental variation related to ecological habitat is the main driver of plant adaptive divergence. Longitude plays an important role in the formation of plant population structure, indicating that environmental differentiation can significantly shape population structure.

Methods: Genetic diversity and population genetic structure were estimated using 105 expressed sequence tag-derived simple sequence repeat (EST-SSR) loci.

Morphological variation in Cynodon dactylon (L.) Pers., and its relationship with the environment along a longitudinal gradient.

Background: Geographical variation in morphological traits may reflect evolutionary patterns of morphological adaptability along environmental gradients. Comprehensive information on longitudinal patterns of morphological trait variation is very meaningful to explore morphological diversity and evolutionary trends in widespread bermudagrass.

Methods: To explore the spatial patterns of morphological traits, we investigated 10 morphological traits of bermudagrass and 10 soil nutrient indexes and collected local climate data for 13 different regions from 119°E to 105°E along the latitude 34°N.

Variations in morphological traits of bermudagrass and relationship with soil and climate along latitudinal gradients.

Background: This complex environmental heterogeneity coupled with the long-standing history offers scenario suitable for and favoring the evolution and existence of variation of morphological traits.

Methods: In this study, we measured 10 morphological traits of 310 individuals sampled at 16 different locations along latitudinal gradients between 22°35'N and 36°18'N to reveal phenotypic plasticity influenced by latitude. In addition, the relationships between morphological variation and soil nutrient and climate factors were analyzed.