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Publication Date
1977
Description
The results of the first-year evaluation of 192 0.lones of Panicum maximum Jacq. are presented. The clones were collected in different regions of Cuba or introduced from foreign countries (71 % and 29 %, respectively). The evaluation was carried out without fertilization nor water supply, each clone being represented per one row and each row divided into three sections, each one representing a particular treatment:(1) annual cutting; (2) cutting frequency of 6 weeks in the dry season and 4 weeks in the wet season; (3) cutting frequency of 8 weeks in the dry season and 6 weeks in the wet season. The evaluated biological parameters were vitality, yield, quality, increase growth, and seed production, a great variability being present in all of them. In respect to DM yield, 55 %, 43 %, and 2 % of the clones produced less than 1348, between 1348 and 1876, and between 1876 and 2405 g per plant per year, respectively. During the wet season, 29 % of the clones presented less than 10.5 % of crude protein, 67 % presented between 10.5% and 13.9%, and 4% presented between 13.9% and 17.2%. Most of the clones produced their major quantity of seed in October, although there is a great variability for flowering date, number of panicles per plant, number of seeds per plant, and germination percentage. High-yield clones were selected, the highest yields being 2405 g per plant per year and 342 g per plant in the dry season. The quality of those clones was acceptable: 17 .6 %of crude protein and 28.9 % of crude fibre in the dry season, and 13.9% of CP and 35.9% of CF in the wet season. Supported by the obtained results, it was concluded that yields can be increased by 15 % for the annual total and 8 % for the dry season production, that growth dynamics can be affected by the frequency of cutting, and that phenological stages are related to DM yields, by which reason they can be used to facilitate the selective process.
Citation
Sidak, V; Segui, Esoeranza; and Perez, C, "Variability in Panicum maximum Jacq. and some results of the selection" (1977). IGC Proceedings (1977-2023). 18.
(URL: https://uknowledge.uky.edu/igc/1977/sess2/18)
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Variability in Panicum maximum Jacq. and some results of the selection
The results of the first-year evaluation of 192 0.lones of Panicum maximum Jacq. are presented. The clones were collected in different regions of Cuba or introduced from foreign countries (71 % and 29 %, respectively). The evaluation was carried out without fertilization nor water supply, each clone being represented per one row and each row divided into three sections, each one representing a particular treatment:(1) annual cutting; (2) cutting frequency of 6 weeks in the dry season and 4 weeks in the wet season; (3) cutting frequency of 8 weeks in the dry season and 6 weeks in the wet season. The evaluated biological parameters were vitality, yield, quality, increase growth, and seed production, a great variability being present in all of them. In respect to DM yield, 55 %, 43 %, and 2 % of the clones produced less than 1348, between 1348 and 1876, and between 1876 and 2405 g per plant per year, respectively. During the wet season, 29 % of the clones presented less than 10.5 % of crude protein, 67 % presented between 10.5% and 13.9%, and 4% presented between 13.9% and 17.2%. Most of the clones produced their major quantity of seed in October, although there is a great variability for flowering date, number of panicles per plant, number of seeds per plant, and germination percentage. High-yield clones were selected, the highest yields being 2405 g per plant per year and 342 g per plant in the dry season. The quality of those clones was acceptable: 17 .6 %of crude protein and 28.9 % of crude fibre in the dry season, and 13.9% of CP and 35.9% of CF in the wet season. Supported by the obtained results, it was concluded that yields can be increased by 15 % for the annual total and 8 % for the dry season production, that growth dynamics can be affected by the frequency of cutting, and that phenological stages are related to DM yields, by which reason they can be used to facilitate the selective process.
