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Objectives of Plant Breeding

Major Objectives of Plant Breeding Program Plant breeding is an important branch of agricultural science. Its main purpose is to develop new and improved crop varieties. These improved varieties give better yield, better quality, and better resistance against diseases and harmful environmental conditions. A plant breeding program is planned according to the needs of farmers, consumers, industries, and climate. The major objectives of plant breeding are explained below in simple paragraph form. 1. Higher Yield The first and most important objective of plant breeding is to increase crop yield. Food demand is increasing due to rapid population growth, so breeders try to develop varieties that produce more grains, fruits, seeds, or biomass per unit area. High-yielding varieties help farmers earn more profit and improve food security. This is why yield improvement is considered the central objective of every breeding program. 2. Improved Quality Another major objective is to improve t...

Nucleus: Chemical constituents

  Chemical constituents of Nucleus Nucleus is called apparatus of heredity. It is the largest extractoplasmic component of cell which contains all the genetic information to control morphology, function and heredity. It is called control room / director/heart of cell. A nucleus in metabolic phase (nondividing phase) I phase is called interphase nucleus. It is not an organelle of cell but component of protoplasm or called extractoplasmic organelle . Nucleus has DNA 9-12 % , RNA 5 % , Lipids 3 % and Ca , Mg , Mn , Na , P , Fe and K , 80 % proteins (65 % acidic non-histone which have height mol. wt., rich in tyrosine and tryptophan, forms enzymes, and helps in transciption of dNA to form RNA ; 15 % proteins are basic like, histone proteins of low mol. wt ., rich in lysine and arginine), DNA : histone ratio is roughly 1 : 1 . Histones neutralize acidity of nucleic acid and prevent transcription of dNA . Histones are structural proteins and suppress genes . Non- histones are functional ...

Wild Mushroom collected from Gorubathan

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