Precocious genotypes and homozygous tendency generated by self-pollination in walnut.

ABSTRACT:

Background

Observations of precocious (early bearing) genotypes of walnut (Juglans regia L.) under natural conditions encouraged us to study the origin and genetic control of these fascinating traits.

Results

In this study, the self-fertility, progeny performance, and simple sequence repeat (SSR) locus variation of iron walnut (Juglans sigillata Dode), an ecotype of J. regia, were investigated. The average self-pollinated fruit set rate of J. sigillata cv. 'Dapao' (DP) was 7.0% annually from 1979 to 1982. The average germination rate of self-pollinated seeds was 45.2% during the 4-year period. Most progeny had inbreeding depression. Nine representative self-pollinated progeny (SP₁-SP₉), with special or typical traits of DP, were selected. SP₁

SUBMITTER: Chen L 

PROVIDER: S-EPMC6278120 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature