संकरण किसे कहते हैं यह कितने प्रकार के होते हैं
Answers
Answer:
इस प्रकार एक बंध s से तथा तीन बंध ᴘ से बनते है परन्तु कार्बन में चारो बंध समान होते है , इस तथ्य को समझाने के लिए संकरण का सहारा लिया गया। .
Answer:
Usually, seeds are the most efficient, simple, economic and convenient resources to conserve plant germplasm.
This is because many plants are regenerated through seeds, and seeds cover relatively small space. In addition, seeds can be easily moved to various places.
Seed conservation is the most broadly used method of ex-situ conservation.
It is performed by drying the seeds at 10-25°C, 10-15% relative humidity followed by storage at -18°C.
limitations:
Viability of seeds is decreased or lost along with time.
Seeds are destructed by insect or pathogen
attack.
This approach is only confined to seed propagating plants, and thus it is useless for vegetatively propagated plants e.g. potato, Ipomoea, Dioscorea.
Heterogenous seeds are not suitable for true genotype maintenance.
Only orthodox seeds can be conserved by this method as the recalcitrant and intermediate seeds cannot stand the dessication.