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Title: Morphological, chemical, and cytogenetic characters of F/sub 1/ hybrids between Parthenium argentatum (guayule) and P. fruticosum var. fruticosum (Asteraceae) and their potential in rubber improvement

Abstract

Interspecific hybrids between Parthenium argentatum, the guayule rubber plant, and P. fruticosum var. fruticosum were evaluated for their potential rubber content and quality. Fifteen-mo-old field-grown plants of P. fruticosum var. fruticosum measured four times more in height and spread than those of P. argentatum, but contained less than 0.05% rubber of low mol wt. Parthenium argentatum showed 2% rubber content, with a mol wt of about one million. Resin contents varied little among parents or hybrids. The same age F/sub 1/ hybrids were intermediate in height and spread and had low rubber content, but showed presence of high mol wt rubber like the guayule parent. This indicates that high mol wt rubber is expressed over the low mol wt rubber in F/sub 1/ hybrids. Despite low rubber content but favorable biomass production, F/sub 1/ hybrids revealed irregular meiotic chromosome behavior and low pollen and seed germination. These results suggest that interspecific F/sub 1/ hybrids may be used in backcross programs to increase biomass and rubber content in guayule.

Authors:
; ; ;
Research Org.:
Univ. of California, Riverside
OSTI Identifier:
6773503
Alternate Identifier(s):
OSTI ID: 6773503
Resource Type:
Journal Article
Journal Name:
Econ. Bot.; (United States)
Additional Journal Information:
Journal Volume: 41:1
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; GUAYULE; GENETIC VARIABILITY; RESOURCE POTENTIAL; BIOMASS; CHEMICAL COMPOSITION; CHROMOSOMES; HYBRIDIZATION; MORPHOLOGY; NATURAL RUBBER; POLLEN; SEEDS; BIOLOGICAL VARIABILITY; ELASTOMERS; ENERGY SOURCES; GAMETES; GERM CELLS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PLANTS; POLYMERS; RENEWABLE ENERGY SOURCES; RUBBER TREES; RUBBERS; TREES 140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)

Citation Formats

Naqvi, H.H., Hashemi, A., Davey, J.R., and Waines, J.G. Morphological, chemical, and cytogenetic characters of F/sub 1/ hybrids between Parthenium argentatum (guayule) and P. fruticosum var. fruticosum (Asteraceae) and their potential in rubber improvement. United States: N. p., Web.
Naqvi, H.H., Hashemi, A., Davey, J.R., & Waines, J.G. Morphological, chemical, and cytogenetic characters of F/sub 1/ hybrids between Parthenium argentatum (guayule) and P. fruticosum var. fruticosum (Asteraceae) and their potential in rubber improvement. United States.
Naqvi, H.H., Hashemi, A., Davey, J.R., and Waines, J.G. . "Morphological, chemical, and cytogenetic characters of F/sub 1/ hybrids between Parthenium argentatum (guayule) and P. fruticosum var. fruticosum (Asteraceae) and their potential in rubber improvement". United States.
@article{osti_6773503,
title = {Morphological, chemical, and cytogenetic characters of F/sub 1/ hybrids between Parthenium argentatum (guayule) and P. fruticosum var. fruticosum (Asteraceae) and their potential in rubber improvement},
author = {Naqvi, H.H. and Hashemi, A. and Davey, J.R. and Waines, J.G.},
abstractNote = {Interspecific hybrids between Parthenium argentatum, the guayule rubber plant, and P. fruticosum var. fruticosum were evaluated for their potential rubber content and quality. Fifteen-mo-old field-grown plants of P. fruticosum var. fruticosum measured four times more in height and spread than those of P. argentatum, but contained less than 0.05% rubber of low mol wt. Parthenium argentatum showed 2% rubber content, with a mol wt of about one million. Resin contents varied little among parents or hybrids. The same age F/sub 1/ hybrids were intermediate in height and spread and had low rubber content, but showed presence of high mol wt rubber like the guayule parent. This indicates that high mol wt rubber is expressed over the low mol wt rubber in F/sub 1/ hybrids. Despite low rubber content but favorable biomass production, F/sub 1/ hybrids revealed irregular meiotic chromosome behavior and low pollen and seed germination. These results suggest that interspecific F/sub 1/ hybrids may be used in backcross programs to increase biomass and rubber content in guayule.},
doi = {},
journal = {Econ. Bot.; (United States)},
number = ,
volume = 41:1,
place = {United States},
year = {},
month = {}
}