黑麦草的三体和非整倍体。

Trisomics and aneuploids of ryegrass.

机构信息

Plant Breeding Department, Agricultural Institute, Oakpark, Carlow, Ireland.

出版信息

Theor Appl Genet. 1972 Jan;42(8):363-7. doi: 10.1007/BF00275362.

Abstract

Primary trisomics (2 n + 1 = 15), double trisomics (2 n + 1 + 1 = 16) and aneuploids with 24 to 30 chromosomes, as well as a diploid and tetraploids, were found in the progeny of a hypertriploid (2 n = 22) plant of perennial ryegrass, Lolium perenne L. Trisomics and double trisomics differed in their mean chromosome association, chiasma number and spike morphology. A few aneuploids and tetraploids had reciprocal translocations. The diploid, primary trisomics and tetraploids were more fertile than the double trisomics and aneuploids. Most trisomics and aneuploids were probably produced through female transmission. One double trisomic had a high univalent number, a low chiasma number and loose chromosome coiling. Both the extra chromosomes carried secondary constrictions. The gene for desynapsis might be located on one of these chromosomes.

摘要

在多年生黑麦草 Lolium perenne L. 的超三倍体（2n = 22）植物的后代中发现了单价体（2n + 1 = 15）、双单价体（2n + 1 + 1 = 16）和具有 24 到 30 条染色体的非整倍体，以及二倍体和四倍体。单价体和双单价体在染色体的平均关联、交叉数和穗形态上存在差异。一些非整倍体和四倍体具有相互易位。二倍体、单价体和四倍体比双单价体和非整倍体更具育性。大多数单价体和非整倍体可能是通过雌性传递产生的。一个双单价体具有高单价体数、低交叉数和松散的染色体缠绕。两个额外的染色体都携带次缢痕。可能在这些染色体之一上定位了基因的不联会。