Stand problems consistently cause significant production and management losses in Arkansas rice fields. In 2002, many fields in Arkansas had severe stand losses. Three control practices are being examined in this project for managing stand losses due to seedling diseases: 1) seed treatment fungicides, 2) development of cold-tolerant cultivars, and 3) the use of disease-suppressive production sy...

Lowland rice roots have a unique physiological response to drought because of their adaptation to flooded soil. Rice root attributes that facilitate growth under flooded conditions may affect rice response to drought, but the relative roles of root structural and functional characteristics for water uptake under drought in rice are not known. Morphological, anatomical, biochemical, and molecula...

A sample set of 21 rice varieties composed of 20 BRRI developed modern rice varieties and one local variety was selected to detect the genetic variation by using 13 morphological traits, 14 physiological traits and 34 SSR markers. All these three methods divide the varieties into five clusters and showed that there exist high genetic variations among the genotypes. Cluster analysis showed that ...

The nature and the magnitude of genetic divergence was estimated in 35 deepwater rice genotypes using Mahalonobis’s D2 – statistics. The genotypes were grouped onto 10 clusters showing fair degree of relationship between geographic distribution and genetic divergence. Cluster IV showed maximum intra cluster divergence while inter cluster divergence was maximum between clusters IX and X. All the...

studies of genetic diversity of plant populations are very important tools for plant breeders. in this study, 110 rice genotypes, including 39 iranian local, 20 iranian improved and 51 foreign improved varieties were studied for 14 agronomic traits in the the rectangular lattice design at the rice research institute of iran (rasht). the analysis of variance showed that there were significant di...

Evaluation of Tolerance to Drought Stress in Rice Genotypes (Oryza sativa L.) from Central and West Asian Countries