Open AccessGenetic Studies in Peach: Inheritance of Sweet Kernel and Male Sterility
Author(s) -
Dennis J. Werner,
Michael A. Creller
Publication year - 1997
Publication title -
journal of the american society for horticultural science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.408
H-Index - 80
eISSN - 2327-9788
pISSN - 0003-1062
DOI - 10.21273/jashs.122.2.215
Subject(s) - biology , sterility , reciprocal cross , genetics , botany , cultivar , genotype , inheritance (genetic algorithm) , white (mutation) , gene , hybrid
Inheritance of the sweet kernel trait was studied in F 1 and F 2 families generated by crossing `Summer Beaut' nectarine (sweet kernel) with `Ellerbe' and `Biscoe' peach. F 1 plants showed bitter kernel. Segregation in the F 2 fit a 3 bitter : 1 sweet phenotypic ratio, suggesting that sweet kernel is controlled by a single recessive gene, for which the symbol sk is proposed. Sweet kernel ( sk ) was linked to nectarine ( g ) at a map distance of 12 cM. Seed bitterness phenotype is controlled by the genotype of the maternal tree and not the genotype of the individual embryo. Inheritance of male sterility derived from plant introduction (PI) 240928 and allelism of male sterile genes found in `Chinese Cling' and `White Glory' were investigated. Analysis of F 1 , F 1 open-pollinated, and BC 1 families derived from crossing PI 240928 with six different wild-type cultivars showed that male sterility in PI 240928 is controlled by cytoplasmic factors. Allelism studies showed that the male-sterile gene found in `White Glory' is not allelic to ps found in `Chinese Cling', and hence is designated ps2.