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ARS Home » Plains Area » College Station, Texas » Southern Plains Agricultural Research Center » Crop Germplasm Research » Research » Publications at this Location » Publication #71818

Title: INTERACTION OF VIRESCENT GENES IN UPLAND COTTON (GOSSYPIUM HIRSUTUM L.): CHLOROPHYLL CONTENT

Author
item ZHANG, T - NANJING AGRICULTURAL UNIV
item PAN, J - NANJING AGRICULTURAL UNIV
item XIAO, S - NANJING AGRICULTURAL UNIV
item KOHEL, RUSSELL

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/1/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary: Virescent cotton plants were investigated for their chlorophyll content. The population of interest was between two virescent lines that produced virescent plants when crossed. The virescents were known to be controlled by independent genes. The results suggest that these genes have an ancestral origin that predates the origin of modern cottons and have retained the same function. These results aid in understanding the chromosome relations in cotton and their functional relations.

Technical Abstract: The interactions between the virescent genes V2 and V14 of cotton were determined and compared with other virescent genes. Single crosses were made among various virescent lines, and the progenies were tested from 1991 to 1994. Allelic tests established that V2 and V14 were nonallelic, but their F1 hybrid plants were virescent, with phenotypic expression and chlorophyll content intermediate between the parents. In the F2 population, plants segregated into classes with various degrees of virescent expression; from green, parental virescents, deep yellow, to chlorotic types with extremely low vigor. The chlorophyll content of functional leaves on the deep-yellow type was less than one-half that of the parental virescent types. The interaction effect between V2 and V14 was prominently reflected in the content of Cb and the Ca/b ratio of the deep-yellow type. This complementary function can be due to the nondiploidized function of homologous loci of the G. hirsutum allotetraploid.