Diallel analysis of heading data and plant height in wheat
ABSTRACT:
Detailed genetic retrospect , with respect to degree of dominance , nature of dominance , proportion of positive to negative effects of genes at the loci exhibition dominance , proportion of dominant to recessive genes in the parents and the number of groups of genes controllinh the particular character was studied for onset-of- heading. 75% heading , heading-span and plant height in a five-parent diallel cross of common wheat ( triticum aestivcum L.) for four generations at two locations in the university of alberta, Edmonton, Canada. The parents involved were marquis. Chinook ( both Canadian) . khushhal (Pakistan), ciano-67 and inta-66

Study of heterosis in some intraspecific crosses of wheat ( triticum aestivcum L.)
ABSTRACT:
Wheat crosses of nine medium and dwarf varieties were evaluated for expression of heterosis in F1 generation for plant height , grain yield and its components. Viz, number of species per plant, number of grains per spike , number of spike,etc per spike and 1000- grain weight. In almost all the crosses, the heterotic effects were apparent in F1 generation to varying extent.

A new interspecific hybrid of cotton gossypium hirsutum L. var, LII-(AD) I X G. nandewarence (DERZ) FRYX-(C1-n)
ABSTRACT:
A sterile cold tolerant triploud of gossypium hirsutum x G. nandewarence was obtained which is being reported for the first time in the history of cotton . cytological studies were carried out and 20.81, 8.611 and 0.33111 recorded at metaphase-1. Morphological studies showed that the hybrid was vigorous and luxuriant in growth with profuse branching and foliage , intermediate in most of the characters. The most important observation was that the foliage remained ever-green throughout the year, even in the severe cold spell in winter season like G. nandewarence.

Apomixes and polyembryony in some andropogoneae from
ABSTRACT:
The species chryosopoqon serrulatus , cymbopoqon parkeri, dichamhium annulatum and themeda anathera were studied embryologically . apomixes was

Biochemical inhibition (allelopathy) exhibited by Italian ryegrass (lolium multiflorum L. )
ABSTRACT:
Italian ryegrass (lolium multiflorum L. ) is a common grass species in many temperate parts of the world. Laboratiort and green house experiments showed that besides toxic roots exudates , water soluble toxins are also present. The present of toxins in root exudates and in the above ground parts of Italian ryegrass was confirmed during the soil leaching, soil mulching experiments and artificial rain drip bioassays. These toxins are capable of significant inhibition of germination and growth of avena, bromus , lactuea and trificlim tested . the possible role of these toxin producing species in agronomy , vegetational dynamics and range land ecology is discussed .

Trials of selective herbisides for weed control in wheat
ABSTRACT:
These selective herbicies phordene , phordester and phenoxylene used as pre-sowing treatment were generalyy effective in killing the broad leaved weeds, but weeds appeared again in the wheat growing season . selective herbicides phenoxylene, 2,4-D amine,

Regeneration of taraxacum roots in relation to carbon and nitrogen supply
ABSTRACT:
Regeneration of taraxacum efficinate weber.. root cutings in relation to carbon and nitrogen supply was studied . it was found that the application of KNO3 promoted the growth of shoots and roots. Sucrose alone, promoted the root growth only slightly where as sucrose and KNO3 showed a pronounced effect on root growth. Organ differentiation in undifferentiated taraxacum root callus did not occur . when sucrose , KNO3 or both was provided . however , roots and shoots were induced in the fresh phoem explants by altering the level of auxin (IAA) and cytokinin (Adenine). And the

Activity of alkaline phosphatase in some seaweeds under the influence of hydrostatic pressure and temperature
ABSTRACT:
The combined effect of hydrostatic pressures varying from 200-800 atm and temperatures ranging from 5 degree ti 25 degree C. was studied on the activity of alkaline phosphatase in delesseria sanginneria and focus vesiculosus. At temperatures between 5 degree C and 15 degree C the hydro static pressure caused a decrease in the enzymic activity , at higher temperatures however the activity was accelerated under the same pressure. The changes in the enzyme activity brought about by increased hydrostatic pressure at temperatures other than 15 degree C were greater in D. sanguinea as compared to F. vesiculosus , enzyme activity in enteromorphia linza, laminaria saccharina and phycodrys sinuosa could not be detected.

The occurrence of mycorrhizas and endogone spores in the rhizospheres of plants growing around university campus islamabad
ABSTRACT:
The incidence of mycorrhizas in the roots and endogone spores in rhizospheres soil of 73 plants growing around university campus Islamabad was investigated . vesicular-arbuscular mycorrhizas were of general occurrence in all lants examined except the members of the families amaranthaceae, chenopodiaceae, palmae, zygophyllaceae, nyctaginaceae , oxalidaceae , vitaceae, celasteraceae .,

Fungal flora of Pakistan cotton
ABSTRACT:

A new name for abutilon lanatum HUS. And BAQ., and its relationship with A. pannosum (FORST.F.) SCHI..
ABSTRACT:
A new name abutilon alii S. abedin is given for abutilon lanatum Hus. And Baq. (1974) which is a later ( miquel , 1849). Relationship with its allied species i.e. A. pannosum ( Forst. F.) Schl. Is also discussed.

Pollen of the genus knema (
ABSTRACT:
Pollen grains of eight species of the genus knema were studied .

Cultivated plants of Iraq and their importance.
ABSTRACT: