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Interspecific amphiploid‐derived alloplasmic male sterility with defective anthers, narrow disc florets and small ray flowers in sunflower
Author(s) -
Liu Zhao,
Cai Xiwen,
Seiler Gerald J.,
Jan ChaoChien
Publication year - 2014
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12216
Subject(s) - biology , cytoplasmic male sterility , sterility , sunflower , helianthus annuus , stamen , population , software maintainer , botany , nuclear gene , hybrid , pollen , horticulture , gene , genetics , mitochondrial dna , demography , sociology
The cytoplasmic male‐sterility ( CMS )/fertility‐restoration system is important for hybrid sunflower ( Helianthus annuus L.) seed production. The objective of this study was to characterize two novel alloplasmic CMS s, designated CMS GRO 1 and CMS MAX 3, with defective anthers, narrow disc florets with no swollen corolla, and short, narrow ray flowers derived from two tetraploid amphiploids ( AMP s). Among 26 tested lines, only AMP Helianthus cusickii /P 21 and HA 410 failed to restore male‐fertility. Segregation of CMS , male‐fertile plants and plants with reduced male‐fertility was observed both in the testcross progeny of a six line half‐diallel cross of F 1 s with CMS MAX 3 and in an F 2 population of CMS GRO 1 × RHA 274. Male‐fertility restoration was controlled by at least two dominant genes. Detailed analysis of the mitochondrial genes may provide insight into the differences between these CMS s and other CMS lines. The new CMS s will facilitate the studies of the incompatibility between cytoplasmic and nuclear genes, especially for the alloplasmic CMS involving perennial species, and also provide unique ornamental flower types and CMS sources for hybrid sunflower breeding.