in order to investigate production potential, variation and genetic similarity of selected iranian smooth brome grass (bromus intermis) genotypes, an experiment was conducted using clonally propagated materials. genotypes were evaluated for agronomic, phenological and morphological characteristics under a randomized complete block design during 2005 and 2006. results showed that there were sign...

The abundance of N in various fractions in maize (Zea mays L.) grain was compared in two genotypes, a normal hybrid (Pioneer 3369A) and its opnque-2 (0-2) counterpart (L3369). Plants were grown in the greenhouse in sand cultures irrigated daily with nutrient solutions containing 3.75 mM N as NO, ion. At anthesis the plant cultures were divided into sets, one set continuing to be irrigated with ...

The pollination ecology of Symplocarpus foetidus (L.) W. Salisbury was studied in a seasonally forested flooded bog Québec (Canada) 2008 and 2009. protogynous anthesis duration ranged from 15 to 20 days with, chronologically, female phase about 5 days, bisexual 2 male 9 days. spadix temperature differences with ambient air were higher during the (mean: 13.6°C) than phases 4.5°C). inside floral ...

Gametophytic selection was examined as a breeding tool in developing Phalaenopsis hybrids that are more cool or warm temperature tolerant. Two hybrid Phalaenopsis, P. (Taisoco Windian × Sogo Yukidian) by P. hybrid unknown, were reciprocally crosspollinated and exposed to 14°C/9°C for 7 days as a cold pollination treatment. Plants were pollinated again and exposed to 30°C/25°C for 3 days for the...

apricot (prunus armeniaca), palys an important role in fruit production industry in iran. irregular set of fruit, caused by either sterility of flower organs or incompatibility has been the main problem in apricot production over the years. in this study, it has been attempted to determine these phenomena for four apricot cvs. namely ‘shahroodi’, ‘nasiri’, ‘jahangiri’ and ‘noori’ through the me...