MEIOSIS AND POLLEN VIABILITY IN HELIANTHUS-TUBEROSUS L AND ITS HYBRIDS WITH CULTIVATED SUNFLOWER

被引：23

作者：

ATLAGIC, J

DOZET, B

SKORIC, D

机构：

来源：

PLANT BREEDING | 1993年 / 111卷 / 04期

关键词：

HELIANTHUS TUBEROSUS; SUNFLOWER DISEASES; SOURCE POPULATIONS; INTERSPECIFIC HYBRID; POLLEN VIABILITY; MEIOSIS; GENOME COMPOSITION;

D O I：

10.1111/j.1439-0523.1993.tb00648.x

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The hexaploid species of Helianthus tuberosus is a potential source of resistance to several sunflower pathogens. Bur crossed with cultivated sunflower, it produces F-1 hybrids which have low values of fertility or even full sterility. Pollen viability and meiotic features were studied in 17 populations of the species H. tuberosus and in F-1 hybrids. Significant differences in pollen viability existed between populations (47.1-98.8 %). In the 15 F-1 hybrids, plant fertility ranged from 0 to 100 % per combination, while pollen viability ranged from 12.4 to 57.1 %. Meiosis was almost normal in the analyzed species, and irregular in the F-1 hybrids. The highest percentage of meiocytes was with bivalents (85.9), but univalents (0.3 %) and multivalents (13.8 %) occurred as well. In metaphase and anaphase, the percentage of meiocytes with fast and lagging chromosomes was high. In anaphase, chromosome bridges were detected in 9.9 % of the meiocytes.

引用

页码：318 / 324

页数：7