germination of different jujube cultivars collected in New Mexico. The two unique germplasm resources of ‘Zaocuiwang’ and ‘Yu’ were identified during the phenology observation and pollen study process. Materials and Methods This experiment was conducted at New
Weisheng Liu, Dongcheng Liu, Aimin Zhang, Chenjing Feng, Jianmin Yang, Jaeho Yoon and Shaohua Li
, China has rich plum germplasm resources. According to Zhang (1990) , there are eight species, five botanical varieties, and ≈800 local cultivars distributed from Yi'an in Heilongjiang Province (lat. 47°50′N) to the middle parts of the Leizhou Peninsula
Zhongshuai Gai, Yu Wang, Jutang Jiang, Hui Xie, Zhaotang Ding, Shibo Ding and Hui Wang
, such as morphology, biochemistry, molecular markers, and sensory evaluation, have been used to evaluate tea germplasm resources ( Feng et al., 2014 ; Li et al., 2016 ; Wambulwa et al., 2016 ). Phenotype can be referred to a good standard for the
Xiaoli Wang, Zhiyong Wang, Li Liao, Xinyi Zhang and Changjun Bai
morphological and agronomic traits ( Liao et al., 2011 ). However, the genetic diversity of wild carpetgrass germplasm resources has been rarely explored, especially at the molecular level ( Xi et al., 2004a ). Thus, the purpose of this study was to assess this
Wenbin Zhang, Junru Zhang and Xulan Hu
Hoan T. Le, James F. Hancock, Ton-That Trinh and Pham-hoang Ho
Hongwen Huang, Ying Wang, Zhonghui Zhang, Zhengwang Jiang and Shengmei Wang
Robert R. Krueger and Mikeal L. Roose
New potential citrus germplasm accessions may be received as seed rather than budwood, thereby reducing phytosanitary risks. However, trueness-to-type may be an issue with seed materials because many varieties produce both apomictic (nucellar) and sexual (zygotic) embryos and most citrus is fairly heterozygous. To identify nucellar seedlings of polyembryonic types and to retain these as representing the type, we screened 1340 seedlings from 88 seed sources for markers amplified with two inter-simple sequence repeat (ISSR) primers. Sixteen seed sources produced no seedlings classified as being of nucellar origin. Among the remaining seed sources, seedlings classed as nucellar were identified for potential addition to the collection. In 37 accessions, both nucellar and zygotic seedlings were detected, and in some cases both types were retained. Inclusion of established accessions of the same cultivar group in the analysis allowed an initial assessment of similarity to existing accessions. This technique improved the efficiency of acquiring new germplasm of polyembryonic types by seed. The method identifies those seed sources that produce few or no nucellar seedlings, but it is not useful for determining which seedlings of monoembryonic types should be retained in collections.
Kai-Ge Zhao, Ming-Qin Zhou, Long-Qing Chen, Donglin Zhang and Gituru Wahiti Robert
cultivars were developed, and many germplasms were collected in Wuhan and Nanjing, China, in recent years. Accurate identification and correct nomenclature of these cultivars are essential for the management of wintersweet germplasm resources. However, only
Laura P. Peña-Yam, Liliana S. Muñoz-Ramírez, Susana A. Avilés-Viñas, Adriana Canto-Flick, Jacobo Pérez-Pastrana, Adolfo Guzmán-Antonio, Nancy Santana-Buzzy, Erick A. Aguilera-Cauich and Javier O. Mijangos-Cortés
The variability and genetic parameters of seven agronomic characteristics were estimated for 11 genotypes, and high values of the phenotypic coefficient of variation (PCV) of capsaicin content (CC) were obtained. Heritability (h2) was high for yield per plant (YP; 0.98) and CC (0.93). The principal components analysis (PCA) revealed that the first three components explained 94.02% of the total variation; therefore, genotypes with higher YP values and fruit weight (FW) (AKN-08, ASBC-09) were placed in quadrant I. Those with greater CC and lowest YP and FW (MBI-11, RES-05) were placed in quadrant II. The greatest fruit length (RNJ-04) was placed in quadrant III. Those with the greatest number of fruits per plant (NBA-06, RKI-01, RHC-02, RHN-03, NKA-07, and MSB-12) were placed in quadrant IV. The results showed that the genotypes studied comprise an excellent source of genetic material for Habanero pepper improvement programs.