Male sterile mutants of barley

Root Hair Mutants of Barley

Almost sixty mutants with shortened or reduced root hairs or without root hairs at all have been isolated among 2000 M1 plant progenies (20.000 M2 seeds) of the spring barley cultivar “Lux” after sodium azide mutagenesis. One group of 25 mutants show fairly stable phenotype while 33 lines have unstable, indistinct or segregating phenotypes. The mutants were selected after 3 to 4 days growth in ...

Molecular mapping of 2 environmentally sensitive male-sterile mutants in soybean.

In soybean [Glycine max (L.) Merr.], manual cross-pollination to produce large quantities of hybrid seed is difficult and time consuming. Identification of an environmentally stable male-sterility system could make hybrid seed production commercially valuable. In soybean, 2 environmentally sensitive male-sterile, female-fertile mutants (ms8 and msp) have been identified. Inheritance studies sho...

An effort to produce a homozygous dominant male-sterile cotton

Nitrate Reductase in Barley Roots under Sterile, Low Oxygen Conditions.

Levels of nitrate reductase activity (EC 1.9.6.1.) as high as 11 mumoles nitrite produced/hour gram fresh weight were found in barley (Hordeum vulgare cv. Compana) roots grown under low oxygen conditions. Roots of plants given identical treatment under sterile conditions did not develop the high levels of nitrate reductase activity. The results suggest that the buildup of particulate, reduced v...

Dinitrogen fixation in male-sterile soybeans.

Partial male-sterile (ms(4)/ms(4)) soybeans (Glycine max L. Merr.) and their fertile isoline (Ms(4)/Ms(4)) were grown in adjoining field plots. From 62 until 92 days after emergence, the nitrogenase activity, assayed by acetylene reduction, of the average male-sterile plant was approximately twice that of the average fertile plant. At approximately 100 days after emergence, the assayable nitrog...