Occurrence of SDR 2N-gametes in Lilium hybrids

被引：28
作者：
Lim, KB
Shen, TM
Barba-Gonzalez, R
Ramanna, MS
Van Tuyl, JM
机构：
[1] BU Biodivers & Breeding, Plant Res Int, Wageningen, Netherlands
[2] NIAB, Genom Div, Suwon 441707, South Korea
[3] Natl Chiayi Univ, Dept Hort, Chiayi 600830, Taiwan
[4] Wageningen Univ, Lab Plant Breeding, Wageningen, Netherlands
来源：
BREEDING SCIENCE | 2004年 / 54卷 / 01期
关键词：
SDR; sexual polyploid; meiosis; pollen viability; intra-sectional hybrid;
D O I：
10.1270/jsbbs.54.13
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
The mechanism of SDR 2n-pollen formation was analyzed in two intra-sectional diploid (2n = 2x = 24) Lilium hybrids (Enchantment x L. pumilum). Variable frequencies of 2n-pollen were found. Meiotic analysis indicated that the intra-sectional hybrids showed perfect chromosome pairing in most cases at metaphase I and normal anaphase I movement of pollen mother cells (PMCs), but produced 2n-pollen by second division restitution (SDR). A high bivalent formation (11.9II and 11.8II, respectively) at metaphase 1, irregular meiotic division such as unbalanced chromosome separation and chromatic fragmentation resulted yet in acceptable pollen fertility for cross-pollination. The hybrids were fertile, and when used as male parents, offspring could tie generated. The significance of the occurrence of 2n-pollen for the breeding of lilies was analyzed.
引用
收藏
页码：13 / 18
页数：6
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