HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Endrizzi, J. E. Articles by Ramsay, G. Search for Related Content PubMed Articles by Endrizzi, J. E. Articles by Ramsay, G. Agricola Articles by Endrizzi, J. E. Articles by Ramsay, G.

Inheritance of the H₁, H₂, and Sm₂ Genes in Cotton¹

Based on early genetic studies of inter- and intra-specitlc crosses in cotton, the genes for increased plant pubescence, H₁ and H₂ are independently inherited. More recent studies with aneuploids of Gossypium hirsutum L. showed that the H₁ and H₂ genes and the Sm₂ gene (that removes trichomes from the plant) all are located on chromosome 6, and that the H₂ and Sm₂ are located in the long arm of the chromosome. The H₂ gene was mapped 4 units from the centromere. Based on the latter data, the three genes may either be closely linked or alleles. In this study, we used aneuplolds to show that the H₁ and Sm₂ genes also are located 4 map units from the centromere in the long arm of chromosome 6. In addition to the cytogenetic approach, we also studied the F₂ populations of the three crosses of H₁ x H₂, H₁ x Sm₂, and Sm₂ x H₂ and found that the three genes segregated as alleles. In view of these results, a revised nomenclature for the smooth-halriness genetlcal system in cotton is needed.

Key Words: Gossypium hirsutum L. • Gossypium barbadense L. • Gossypium tomentosum Nutt. ex Seem. • Genetics • Cytogenetics • Aneuploids

² Professor and research assistant, Dep. of Plant Sciences, Univ. of Arizona, Tucson, AZ 85721.

Received for publication June 14, 1982.