Which tropical sugarcane variety is grown in South India,characterized by a thick stem and high sugar content,but does not grow well in North India?

Which is the oldest method of plant breeding for crop improvement?

Inbreeding depression is primarily associated with which of the following?

Plant breeding is a technique of improving

Plant breeding has a close relationship with

Select the correct option for $Saccharum$ $barberi$ and $Saccharum$ $officinarum$.
$I -$ Low sugar content
$II -$ High sugar content
$III -$ Low yield
$IV -$ High yield
$V -$ Grown in North India
$VI -$ Grown in South India
$Saccharum$ $barberi$ $\quad$ $Saccharum$ $officinarum$