This document discusses various methods for assessing genetic purity in plants, including morphological, chemical, and electrophoresis-based methods. Morphological methods involve examining seed or plant traits under magnification or in a grow-out test. Chemical methods analyze seed components like secondary metabolites and proteins. Electrophoresis separates proteins or DNA based on size and charge, allowing comparison of banding patterns between varieties. Together, these methods allow testing seed samples against a pure reference to validate their genetic purity or identify off-types.
Significance of seed borne diseases on crop production in bangladeshMd Kamaruzzaman
油
This document discusses the significance of seed borne diseases on crop production in Bangladesh. It outlines several objectives related to understanding seed borne pathogens, annual crop losses, seed infection and management. It then provides definitions of seed and seed borne disease. The document lists examples of common seed borne diseases and their pathogens for various crops. It discusses the role of unhealthy seeds in issues like germination failure and introduces new diseases. Finally, it provides data on losses for several crops and pathogens due to factors like reduced germination and yields.
畛 xem full ti li畛u Xin vui long li棚n h畛 page 畛 動畛c h畛 tr畛
: https://www.facebook.com/thuvienluanvan01
HO畉C
https://www.facebook.com/garmentspace/
https://www.facebook.com/thuvienluanvan01
https://www.facebook.com/thuvienluanvan01
tai lieu tong hop, thu vien luan van, luan van tong hop, do an chuyen nganh
25. 28/10/2008 GVHD: Nguy畛n Th畛 T狸nh - B動畛m :di 6,5 mm, s畉i c叩nh 12mm, mu n但u, ng畛c en, c叩nh tr動畛c nh畛n en c坦 4 ai ngang mu n但u 畉m. - Tr畛ng g畉n gi畛ng h畉t g畉o, di 0,4-0,6 mm, r畛ng 0,2-0,3 mm, mu h畛ng. - S但u non : mu h畛ng nh畉t, 畉y s畛c di 11-14 mm, mu 畛 h畛ng . - Nh畛ng :b畉u d畛c di 6-9 mm, r畛ng 2,5mm, mu vng nh畉t.
38. 28/10/2008 GVHD: Nguy畛n Th畛 T狸nh c/ H狸nh th叩i _ Tr動畛ng thnh : di 10-12mm, s畉i c叩nh 20- 24mm, th但n mu tro, m畉t k辿p mu en, c叩nh tr動畛c di h畉p. _ Tr畛ng : b畉u d畛c, di 0,49mm, r畛ng 0,37mm.Tr畛ng m畛i 畉 c坦 mu tr畉ng. _ S但u non 畉y s畛c di 14mm, mu c坦 mu 畛 t鱈m, b畛ng mu xanh. 畉u v m畉nh l動ng ng畛c tr動畛c c坦 mu n但u nh畉t hay mu kh叩c. Khi m畛i n畛 c坦 mu vng hoa tr畉ng sau chuy畛n thnh mu tr畉ng xanh. Sau khi d畛t k辿n c坦 mu vnh xanh. Gi畛a m畉nh l動ng ng畛c tr動畛c c坦 1v但n en h狸nh ^, hai b棚n v但n c坦 m畛t 畛m en. G畉n m辿p sau c坦 hai 畛m en. _ Nh担ng : di 10mm, r畛ng 3mm, mu vng n但u. M畉m c叩nh v r但u di t畛i m辿p 畛t b畛ng th畛 t動. Cu畛i b畛ng c坦 6 m坦c, h狸nh b畉u d畛c di mu tr畉ng.