STERILITY IN RYE POPULATIONS

Fertility compensation of cornerstone male sterility of wheat by rye.

The genome of rye is known to compensate for the lost male-fertility gene(s) of wheat chromosome arm 4Aalpha in the Cornerstone male-sterility mutant. A search for the rye chromosome(s) involved in this compensation showed that chromosomes 2R and 4R are responsible. Only the short arms of these two chromosomes are the operative ones. Chromosome arm 4RS compensates in an erratic way, whereas 2RS...

The Distribution of Self-Sterility Alleles in Populations.

H E phenomenon of self-sterility is known to be very common among T higher plants. The genetic mechanism in most cases studied seems to be that discovered by EAST and MANGELSDORF in Nicotiana data and N . Sanderae. A single series of alleles, S1, Sz . . . , is involved. The growth of a pollen tube is so much inhibited in a style whose cells contain the same allele that it does not reach the emb...

Sterility

Sterility in Wheat Hybrids. I. Sterility Relationships and Endosperm Development.

Partial or complete sterility is of frequent occurrence in species crosses. Within the same genus certain species are sterile when crossed while ather combinations are completely fertile. Partial sterility may cause the elimination of certain classes of gametes and prevent desired recombinations of characters in the second generation. Sterility may also cause an abnormal vegetative development....

A quantitative genetic analysis of nuclear-cytoplasmic male sterility in structured populations of Silene vulgaris.

Gynodioecy, the coexistence of functionally female and hermaphroditic morphs within plant populations, often has a complicated genetic basis involving several cytoplasmic male-sterility factors and nuclear restorers. This complexity has made it difficult to study the genetics and evolution of gynodioecy in natural populations. We use a quantitative genetic analysis of crosses within and among p...