Đánh giá khả năng thích ứng và sinh trưởng của các dòng vô tính loài Quao (Dolichandrone spathacea (L.f.) K. Schum) 9 tháng tuổi ở sưu tập nguồn gen kết hợp khảo nghiệm dòng vô tính tại tỉnh Quảng Trị

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Thái Dương Đặng, Thái Hoàng Đặng, Huy Tuấn Hoàng, Văn Minh Nguyễn, Cường Phạm, Tiến Dủng Phan

Ngôn ngữ: vie

Ký hiệu phân loại: 635.8 Mushrooms and truffles

Thông tin xuất bản: Nông nghiệp & Phát triển nông thôn, 2021

Mô tả vật lý: 125 - 133

Bộ sưu tập: Metadata

ID: 498221

Thêm vào giỏ

Dolichandrone spathacea (L. f.) K. Schum is a valuable multi - purpose species. Currently, the need for afforestation of this species has pressingly required the available of trial garden to select varieties, build seedling nurseries and provide good seeds. Therefore, it is necessary to evaluate the adaptability and growth in order to choose dominant trees providing good varieties for production. Different 9 - month - old Dolichandrone spathacea clones's survival rates assessed by standard are the same and range from 78.33% to 95%. Using Duncan test to categorize, 33 clones in growing diameter groups were selected with Do reached 1.5 cm to 1.67 cm while 25 clones in height groups were chosen among the highest growth rates with Hvn peaked 52.11 cm to 54.67 cm. As for the growing evaluation by diameter and height, Sig values in those groups completely reached above 0.05, showing that there was no growing difference among various clones in each group. The results of analysis and synthesis based on 3 criteria: survival rate, peak height, stem diameter have selected 19 elite Doìichandrone spathacea clones with survival rate, height, stem diameter, which are grouped and ranked. The highest rank in the forest of gene collection combined with clonal testing in Quang Tri province at 9 - month - old period, including: Doli.TTH1, Doli.TTH2, Doli.TTH4, Doli.TTH10, Doli.TTH13, Doli.TTH14, Doli.TTH15, Doli.TTH16, Doli.TTH23, Doli.TTH25, Doli.TTH28, Doli.TTH29, Doli.TTH30, Doli.TTH31, Doli.TTH41, Doli.TTH42, Doli.TTH43, Do11.TTH45, Doli.TTH46.Quao (Dolichandrone spathacea (L. f.) K. Schum) là loài cây đa mục mục đích có giá trị cao. Hiện nay chưa có các vườn khảo nghiệm giống nhằm chọn lọc giống để xây dựng vườn giống và cung cấp giống tốt cho công tác trồng rừng loài cây này. Vì vậy, đánh giá khả năng thích ứng và sinh trưởng nhằm lựa chọn các dòng cây trội cung cấp giống tốt cho sản xuất là rất cần thiết. Dùng tiêu chuẩn X052 để đánh giá tỷ lệ sống của các dòng Quao giai đoạn 9 tháng tuổi là có tỷ lệ sống như nhau và dao động từ 78,33% cho đến 95%. Dùng Duncan test để phân nhóm về sinh trưởng đường kính đã chọn được 33 dòng với D0 từ 1,5 cm đến 1,67 cm và phân nhóm về chiều cao đã chọn được 25 dòng thuộc nhóm có sinh trưởng cao nhất với Hvn từ 52,11 cm đến 54,67 cm. Đánh giá sinh trưởng đường kính và chiều cao các giá trị Sig ở các nhóm đều lớn hon 0,05 chứng tỏ không có sự sai khác về sinh trưởng của các dòng trong 1 nhóm. Kết quả phân tích, tổng hợp dựa vào 3 chỉ tiêu: tỷ lệ sống, chiều cao vút ngọn, đường kính gốc đã chọn được 19 dòng Quao ưu tú có tỷ lệ sống, sinh tưởng đường kính và chiều cao được phân nhóm, xếp hạng cao nhất ở vườn sưu tập nguồn gen kết hợp khảo nghiệm dòng vô tính tại tỉnh Quảng Trị giai đoạn 9 tháng tuổi gồm: Doli.TTH1, Doli.TTH2, Doli.TTH4, Doli.TTH10, Doli.TTH13, Doli.TTH14, Doli.TTH15, Doli.TTH16, Doli.TTH23, Doli.TTH25, Doli.TTH28, Doli.TTH29, Doli.TTH30, Doli.TTH31, Doli.TTH41, Doli.TTH42, Doli.TTH43, Do11.TTH45, Doli.TTH46.

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